Time Scales of a Geothermal Systemfrom Actinolite Fe-Mg Zoning
Item Type text; Electronic Thesis
Authors McIntire, Michael Zackery
Publisher The University of Arizona.
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Download date 29/05/2018 22:55:34
Link to Item http://hdl.handle.net/10150/555561
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Abstract
Volume diffusion provides a mechanism to assess the duration, and hence the
timescales of thermal events. In this study, interdiffusion of Fe and Mg across a sharply
zoned interface in actinolite was studied to determine timescales of hydrothermal
activity associated with the Santos deposit in Punta del Cobre, Chile. Petrographic
analysis to identify textures, mineral relations, and mineral orientation was conducted
on several thin sections of drill core from the Santos deposit. Mineral phase relations,
fluid inclusion results from the nearby Candelaria deposit, and comparison with the
modern Salton Sea Geothermal System allow estimation of the maximum temperatures
during ore formation. SEM analyses were performed on the samples to identify strongly
zoned actinolite crystals. Microprobe stage scan analyses were conducted to create a
diffusion profile and determine the diffusion coefficient and time. Although there is
little known about diffusion in actinolite, orthopyroxene (OPX) was chosen as a proxy
because it is a chain silicate and has Fe-Mg diffusion in both of the M sites and thus
broadly analogous to actinolite. Using OPX diffusion coefficients maximum timescales
from 104 to 106 years for maximum temperatures of 350 to 450˚C. These times match
data from some modern geothermal systems.
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Introduction
Timescales of ore formation are commonly limited to geochronological age
determinations on cross cutting features within the ore-forming system. These
relationships provide absolute ages, but often are not sufficiently precise (or accurate)
to constrain durations of the thermal anomalies that may have been related. Volume
diffusion provides an alternative mechanism to assess the duration, and hence the
timescales of related thermal events. This study uses Fe and Mg diffusion in
hydrothermally formed actinolite crystals to assess the maximum duration of the
thermal anomaly associated with iron oxide copper gold (IOCG) systems in Chile. IOCG
systems result from brine-dominated hydrothermal activity that is typically driven by
magmatism (Barton, 2014).
The timing and duration of hydrothermal systems are not well constrained. Currently,
conventional geochronology on cross-cutting events provides this information, however
the precision of the analyses and other uncertainties make it difficult to resolve
differences of much less than 1 m.y. Consequently, many ore-forming systems are
interpreted to last for many millions of years (e.g., Sillitoe and Perello, 2005) whereas
conductive cooling requires that the high-T thermal lifespans of causative igneous
centers almost always is less than 1 m.y. (e.g., Hanson and Barton, 1989). .
Diffusion profiles, which even out as a function of temperature and time, provide one
approach for tightening the timing constraints and placing an improved upper bound on
temperature and time. Actinolite is a common mineral found in IOCG systems, and it
can have considerable variation in Fe and Mg contents. Therefore, if sharp profiles exist,
the extent of diffusion, will reflect temperature and time. Using the mineral associations
present in the samples, fluid inclusions, and modern analogs to constrain the
temperature of the hydrothermal systems it becomes possible to calculate the time of
hydrothermal exposure of the sample based on the extent of diffusion across the Fe and
Mg interface in the actinolite crystal.
5
Geologic background and samples
The Santos deposit in the Punta del Cobre district is located near the town of Copiapó in
the Chilean Coastal Cordillera. The Punta del Cobre district formed east of the Atacama
fault zone, which is an arc-parallel strike slip system of faults and has been active since
the Jurassic (Marschik and Fontbote, 2001). The mineral deposits are IOCG type
deposits and are hosted in arc-derived volcanic rocks of Early Cretaceous age (Marschik
and Fontbote, 2001).
This study began with the observation that very fine-grained actinolite from the Santos
deposit exhibited sharp boundaries when observed in back-scattered electron (BSE)
images in JEOL 6010L SEM. These samples were among many from diamond drill core
obtained at Santos as part of a broader study of that deposit and the Chilean IOCG belt
(e.g., Barton SGA papers). The BSE images highlighted what turns out to be abrupt iron
and magnesium zoning within actinolite grains. These were selected for additional
petrographic and analytical work to determine if the profiles could yield useful
information about diffusion histories.
Analytical Methodology
Beginning with detailed petrography and SEM imaging, the core work in this project
were electron microprobe analyses to determine mineral compositions and their spatial
variation.
The selected samples were first observed through a petrographic microscope. This
process allowed identification of various textures and the location of appropriately sized
and oriented crystals. Crystals oriented with their long axis (C) in the plane of the
section were selected because this direction is both easy to determine and because it
corresponds to best estimates of diffusion data. Petrography was used to identify the
mineral assemblages to better constrain temperatures of formation. The samples were
viewed on a JEOL JSM-6010LA SEM at the University of Arizona, where preliminary data
6
was collected using the energy dispersive spectroscopy (EDS) and BSE imaging to see if
zoning was present. The samples were brought to the University of Arizona Cameca
SX100 electron probe microanalyzer where several overlapping points were setup in a
line spanning across the zonation and from the high Z into the low Z sections of the
actinolite grains (stage scan). Stage scans were run on several different grains and
several different orientations (Fig. 1). The standards used for microprobe analyses are;
albite-cr, ol-fo92, anor-hk, kspar-OR1, rutile1, rod791, fayalite, barite2, MgF2, ap-synap,
scap-s, v_1, chrom_s, scdi, nidi, codi, ZnO, SrTiO3, GGG, SnO2, and ZrO2. There were 2
operating conditions for the microprobe, condition 1 tested for the elements Na, Mg, Al,
Si, K, Ca, Ti, Mn, Fe, Ba, and condition 2 tested for F, S, P, Cl, V, Cr, Sc, Ni, Co, Zn, Sr, Ga,
Sn, Zr. Both conditions operated under 20keV, while condition 1 operated at 20nA and
condition 2 operated at 299nA.
The data obtained from the microprobe stage scan analyses were normalized using the
13eCNK normalization routine for calcic amphibole (Mazdab, 2003; Schumacher, 1997).
This routine assumes that there is no Mn, Fe, or Mg in the M4 site (Spear 1993, p. 104),
and charge balances the formula by assuming that there are 23 atoms of O (Mazdab,
2003). In order for the routine to be considered sound the total amount of calculated
ferric iron must not exceed the total iron and must be greater than zero (Spears 1993,
p. 104), and cations can only occupy structurally and energetically favorable sites
(Spears 1993, p. 104). Some of the uncertainties associated with normalizing data for an
amphibole come from the assumption that there is no deficiency in hydrogen (Spears
1993, p. 103), an unanalyzed element. Another uncertainty comes from the presence of
structural vacancies within the crystal lattice (Spears 1993, p. 103). The Fe+2/Fe+3 ratio is
not fixed for this routine and can vary from point to point within the same stage scan.
This can cause the normalized output to not have a continuous line on the diffusion
profile where the raw data will have a more smooth profile.
Diffusion profile calculations and solving for time
7
The normalized values of the mass fraction of Fe+2 compared to Mg, and the raw
microprobe values of the mass fraction of Fe compared to Mg were then used to solve
for Dt, (diffusion coefficient multiplied by time). Equation 1 is a solution to the diffusion
equation and the derivation can be found in Crank (1986). Equation 1 assumes that the
initial values are from a semi-infinite source (Ganguly, 2002).
Ci(t, x) = Ci(0) +∆C0
2[1 − erf
x
2√Di(EB)t] [1]
Equation 1 was used to fit a line to the normalized and original microprobe results, a
best fit line was obtained by substituting values for Dt. Figure 2 displays the plots of the
raw microprobe data, these data are normalized to the mass fraction of Fe compared to
Mg. Figure 3 shows the plot of the data that was normalized using the 13eCNK
amphibole normalization routine. The iron values of this plot are normalized to the mass
fraction of Fe+2 compared to Mg.
The microprobe electron beam penetrates and spreads out when it comes in contact
with the sample area (Ganguly et al. 1988). This convolutes the data giving values for a
larger area than what is analyzed. Deconvolution corrects for this by subtracting a
calculated additional amount from the convoluted Dt. Deconvolution of the Dt values
Ci(t,x) = The concentration of component i at time t
and position x
Ci(0) = The lower of the two initial values
ΔC0 = Difference between initial compositions
X = Distance from interface
Di(EB) = Effective binary diffusion of component i
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was performed to account for the added excitation within the grain by the microprobe
beam. The convoluted value can be found by equation 19 from Ganguly et al. (1988).
Dt = Dct − ϵ2
2 [2]
Where D is the deconvoluted diffusion coefficient and Dc is the convoluted diffusion
coefficient found from equation 1. The variable epsilon depends on the concentrations
of the components on either side of the interface, and the slope of the convoluted
profile at the interface (Ganguly et al. 1988). This project used 0.58 for epsilon, which
was experimentally determined by Ganguly et al. (1988) in numerical simulations of
previously step scanned garnet couples (Elphick et al. 1985) in an attempt to find
common epsilon values from microprobe analyses.
Once Dt was determined, a model time could be estimated by first calculating the
diffusion coefficient and assuming that the temperature was constant. Because
diffusion is an unknown in amphibole, the equation for calculating the diffusion
coefficient for orthopyroxene was used as a proxy (Ganguly and Tazzoli 1994).
log D(Fe − Mg)c−b = −5.54 + 2.6XFe −12530
T [3]
Because there is very little information about diffusion in amphiboles a proxy was
needed. A chain silicate would be the most likely proxy. Both OPX and clinopyroxene
(CPX) have diffusion data and were both looked at as possible proxys. Diffusion of Fe
and Mg is considerably slower in CPX than the diffusion in OPX (Muller et al., 2013) and
the diffusion durations found from the analysis of CPX were extraordinarily long and not
feasible. The jump distances (table 3) were looked at and found to be comparable, so
the metal sites available for diffusion were considered. Fe-Mg diffusion can occur
between the M1 through M3 sites in actinolite (Evans and Yang, 1998), both the M1 and
M2 sites in OPX (Ganguly and Tazzoli, 1994), and only in the M1 site in CPX (Muller et al.
2013). Because of the metal sites available for diffusion, OPX was chosen as the best
proxy for actinolite in this study.
9
Results
Petrographic description
Table 1 list the mineral associations found through petrography in samples
DDH673.376.8, DDH643-555.5, DDH628-480.3, and DDH628-593.2.
Table 1: Mineral Associations
Sample Sulfide
Minerals Non-Sulfide
DDH673-376.8
pyrite, chalcopyrite,
bornite
actinolite, epidote, titanite, apatite, magnetite, hematite,
DDH643-555.5
pyrite, chalcopyrite
actinolite, allanite, epidote, calcite, apatite, magnetite, hematite
DDH628-480.3
pyrite, chalcopyrite
calcite,actinolite,quartz,apatite,epidote,titanite, allanite, chlorite, magnetite
DDH628-593.2
pyrite, chalcopyrite
actinolite, epidote, chlorite, apatite, quartz, magnetite
There are many different textures associated with each individual sample, especially
when considering the actinolite. DDH673-376.8 is an actinolite-epidote-calcite-apatite
matrix supporting rounded magnetite-actinolite-pyrite clasts and rounded actinolite
clasts. Actinolite in matrix can have a fluidized texture, and actinolite is replacing some
of the magnetite clasts. Both the matrix and the clasts are cut by pyrite-chalcopyrite-
epidote ptygmatic veins.
Within the textures of DDH643-555.5 are allanite-actinolite breccia vein supporting
magnetite-pyrite clasts cutting a magnetite-actinolite-pyrite host. Actinolite in matrix
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can have a fluid texture. Pyrite –chalcopyrite-magnetite veins cutting parallel to flow
through actinolite and allanite.
Complex textures are present in sample DDH628-480.3. This sample is defined by an
actinolite-magnetite-epidote-chalcopyrite-pyrite breccia vein supporting magnetite-
pyrite-chalcopyrite clasts. Calcite veins cut through the breccia vein and all of this is cut
by a foliated chlorite-chalcopyrite-calcite vein. This vein cuts perpendicular to the
magnetite-epidote-chalcopyrite-pyrite breccia vein, and is itself cut by actinolite veins.
The actinolite can have flow textures within the matrix.
Sample DDH628-593.2 is an actinolite-magnetite-pyrite supported breccia with
subrounded magnetite-pyrite, actinolite, epidote-magnetite, and magnetite-apatite-
relic feldspar clasts. The breccia and clasts are cut by late sub mm calcite veinlets. The
actinolite can have flow textures in the matrix.
Normalized and raw Dt results
Both the raw and the normalized data for samples DDH673-376.8, DDH643-555.5,
DDH628-480.3, and DDH628-593.2 can be found in the appendix. The Dt values for the
above samples were found for both the raw microprobe data and the normalized data.
Table 2 lists the normalized and raw values of Dt for each related samples after
deconvolution. The raw microprobe data does not take into consideration the amount
of Fe+3 that is present within the crystal structure and the normalized data has an
inconsistent amount of Fe+3. Based on equation 1, Dt is partially dependent on the
concentration of Fe present in the stage scan area. Fe+2 is more likely to diffuse with Mg
than Fe+3 because of like charges, so the raw data overestimates the concentration of
Fe, while the normalized data is more scattered and may overestimate the
concentration of Fe+3. The Dt values for the a and b axis scans were calculated but are
not discussed in this paper because they are not used in the calculation of time. It was
decided that only c axis diffusion would be meaningful due to diffusion along the a and b
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axes being much slower. The a and b axes are more effected by structure than the c axis
(Ganguly and Tazzoli, 1994).
Table 2: Raw and Normalized Dt values
Sample Dt (raw) Dt
(normalized)
DDH673-376.8 1.33E-08 1.33E-08 DDH643-555.5 8.82E-10 1.33E-08
DDH628-480.3 area 1 1.38E-09 1.58E-09
DDH628-480.3 area 3 1.12E-09 2.32E-09
DDH628-593.2 breccia 1.12E-09 2.82E-09
DDH628-593.2 flow band 1.82E-10 2.82E-09
Discussion
The abrupt transitions between magnesium-rich cores and iron-rich rims in the
actinolite found in these sample represents an evolved interface reflecting some
component of diffusion and some component of original gradient. The latter is an
unknown, it may have been sharp, or it may have been gradational, perhaps similar to
what is observed today. Indeed, there were instances where higher Z (Fe-rich) core and
a lower Z (Mg-rich) rim. The grains found displaying this characteristic were not large
and sufficiently idiomorphic to justify a stage scan.
The model assumes that if there was no diffusion within the grain the profile would be
sharp, with a vertical line separating the iron and magnesium rich portions of the
generated profile. When diffusion starts the profiles will begin to equilibrate starting at
the interface. Complete diffusion would mean equilibrium has been reached and the
profile would be a horizontal line. It is important to find a grain that has a profile that
still has horizontal sections on both sides of the interface, this means that there is a
semi-infinite source for diffusion. These horizontal segments are the initial conditions,
and the slope between them indicates the amount of diffusion that has taken place.
Several of the samples analyzed do not have a semi-infinite source, particularly in
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relation to the iron end rim. This study assumes that the highest concentration of iron
before the interface is the initial condition, but this may not be the case.
Little is known about amphibole diffusion, because amphibole has the tendency to
dehydrate under high pressures and temperatures making experimentation difficult
(Jibamitra Ganguly, pers comm.), because of this a proxy was needed to calculate the
diffusion coefficient of actinolite. The greater the distance between the diffusing metal
sites the more energy is needed to make the jump, and the slower the diffusive process
(Zhang, 2010). A comparison of the jump distances between metal sites for diopside,
enstatite, and actinolite completed to determine if the diffusion time would be similar.
The distances between the metal sites and associated angles between the sites are
listed in Table 3. The sites that are relevant for this study are M1 to M2 and M3 for
actinolite, M1 to M1 for diopside, and M1 to M2 and M1 to M1 for enstatite. Equation
3 was used to calculate the diffusion coefficient associated with orthopyroxene.
Table 3: Jump distances between metal sites Mineral Metal sites compared Distance (Å) Angle (°)
Actinolite Mg1 to Mg2 3.0939 94.782 Mg1 to Mg3 3.0826 95.992 Mg2 to Mg3 3.1998 98.839
Diopside Mg1 to Ca2 3.1827 93.14 Mg1 to Mg1 3.1139 95.379 Mg1 to Ca2 3.4443 101.41
Enstatite Mg1 to Mg1 3.105 95.899 Mg1 to Mg2 3.0313 93.388 Mg1 to Mg2 3.2856 96.786
Table 3: Data for actinolite was from Evans and Yang 1998, diopside data is from Gordan
et al. 1981, and enstatite data is from Yang and Ghose 1995. The data were processed
through the RRUFF project and XTALDRAW software. The data shows that the jump
distances between the relevant sites are similar.
Diffusion depends on temperature, consequently it is necessary to estimate the
maximum temperature of hydrothermal activity and any subsequent thermal events. In
the case of the Santos deposit there is little evidence for a thermal overprint in contrast
to the Candelaria deposit where contact metamorphism substantially modified the
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original hydrothermal assemblages. Although the actinolite-bearing samples are
products of sodic-calcic metasomatism, their mineralogy is compositionally similar to
the actinolite-epidote-albite-chlorite-titanite assemblages characteristic of the
greenschist metamorphic facies. This mineralogical similarity allows some constrains on
the P-T of the samples (Spear 1993, p. 16-17). The greenschist facies provides a
temperature range of approximately 200°C to about 450°C assuming pressure less than
1kbar. Marschik and Fontbote (2001) reported fluid inclusions filling temperatures in
the Candelaria deposit of 370 to 440°C. These temperatures may be overestimates due
to later contact metamorphism, however they are broadly comparable to a modern day
analog, the Salton Sea Geothermal System, where the temperatures reach 365°C
(McKibben et al. 1988). Figure 4 shows the graphs of both the normalized and raw time
frames when considering a range of temperatures from 365 to 445°C. The maximum
durations estimated by the raw data are generally about an order of magnitude less
than the time scales for the normalized data. This is because equation 3 has a
dependence on the mass fraction of Fe to determine the diffusion coefficient. The mass
fraction for Fe at the interface was used in all calculations. Because the normalized
value for Fe+2 was uneven, this value could be close to the mass fraction of Fe of the raw
value, which is what is expected, or it could be around 60 percent of the raw value. This
decrease in the mass fraction decreases D and increases time.
When looking at the timescales found, Figure 4, and looking at the same sample, but
different textures, Figure 4 E and F, it is obvious that the breccia has been exposed to
more hydrothermal activity than the fluid vein. This implies that the brecciated crystals
formed prior to the flow banding. When looking at the same texture at another point
on the same sample, Figure 4 C and D, the time frames are similar. The timeframes
throughout all samples, in general, suggest that the samples have been exposed to
different degrees and amounts of hydrothermal activity. This could mean that the
actinolite formed at different times, and the hydrothermal activity in the Punta del
Cobre region was constant. This idea would mean that the longer timeframes are more
14
accurate depictions of the duration of hydrothermal activity. It is also possible, and
perhaps more likely, that the hydrothermal activity was varied and would be dormant
for a periods of time. There have been several pulses of magmatic intrusions in the
region since the Jurassic (Marschik and Fontbote, 2001), and possible hydrothermal
activity associated with each pulse. These veins may have been active for more than
one pulse. Reintroduction of hydrothermal fluid into the veins could cause the
mineralization of new actinolite crystals, and the continuation of diffusion in the crystals
already present.
Conclusions
The Santos Deposit has experienced several pulses of magmatic intrusions and volcanic
activity. IOCG type deposits require a heat source for fluid transport, and the magmatic
pulses could be the heat engine that circulated the hydrothermal fluids. Geothermal
systems and associated hydrothermal activity can be an important part of ore
mineralization. Understanding the duration of hydrothermal activity within these
geothermal systems can provide insight into the grade of the ore deposit.
It is possible to constrain the temperatures associated with hydrothermal activity
through use of mineral associations, fluid inclusions, and modern analogs. A look at the
fluid inclusions in the nearby Candalaria deposit, as well as a comparison to the Salton
Sea Geothermal system provides a temperature constraint from 350°C to 450°C, which
is consistent with the mineral associations present that indicate a temperature similar to
a greenschist metamorphic system. Although diffusion in actinolite is not well studied,
it is possible to use OPX as a proxy to determine the timescales of diffusion and
hydrothermal activity. These hydrothermal systems are short lived and happen in
different pulses with different chemistry.
Acknowledgments
I would like to thank Professor Mark Barton for supporting and encouraging this
research. I would also like to thank Professor Jibamitra Ganguly for sharing his
15
knowledge of diffusion, Dr. Ken Domanik for his assistance patience with the
microprobe, Dr. Frank Mazdab for mineralogical and normalization assistance and
editing, and Simone Runyon for her assistance with rock descriptions and editing. This
research would not be possible without the support of Professor Mark Barton by
Freeport-McMoRan in his field and petrographic studies of the Santos deposit, the
Science Foundation of Arizona, and NSF Grant EAR08-38157 to Professor Mark Barton.
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Appendix
Table 4: Microprobe oxides and normalized crystal chemistry for DDH673-376.8 Distance (µ) 0 0.51 1.02 1.53 2.04
Na2O 0.519267 0.421319 0.451387 0.332337 0.384591 MgO 14.55967 14.3271 13.67758 14.41045 14.40755
Al2O3 5.05887 4.856478 5.347431 2.496383 2.939853 SiO2 51.0423 51.42751 50.50892 53.55719 52.9565 K2O 0.262932 0.229903 0.283961 0.098917 0.151832 CaO 12.60279 12.69652 12.69211 12.50632 12.53498 TiO2 0.174642 0.131961 0.135765 0.095369 0.15552 MnO 0.20086 0.219796 0.26047 0.272793 0.270221 FeO 14.74549 14.7576 15.62698 15.43123 15.80646
F 0.129364 0.04322 0.063545 0.084477 0.053271 Cl 0.174898 0.163074 0.184493 0.087188 0.140112
Cr2O3 0.013075 0.010241 0.005424 0.026568 0.000015 Total 99.48416 99.28472 99.23808 99.39922 99.8009
Si (T) 7.26 7.34 7.25 7.63 7.53 Al (T) 0.74 0.66 0.75 0.37 0.47
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.11 0.15 0.15 0.05 0.02 Fe3 (VI) 0.55 0.45 0.49 0.36 0.47 Fe2 (VI) 1.20 1.32 1.39 1.48 1.41 Mg (VI) 3.09 3.05 2.93 3.06 3.05
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.02 0.03 0.03 0.03 0.03
Ti (VI) 0.02 0.01 0.01 0.01 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.92 1.94 1.95 1.91 1.91 Na (VIII) 0.08 0.06 0.05 0.09 0.09
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.06 0.06 0.08 0.00 0.01 K (A) 0.05 0.04 0.05 0.02 0.03
VAC (A) 0.89 0.90 0.87 0.98 0.96 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.90 1.94 1.93 1.94 1.94 F (X) 0.06 0.02 0.03 0.04 0.02 Cl (X) 0.04 0.04 0.04 0.02 0.03 Total 2.00 2.00 2.00 2.00 2.00
Table 4 Continued: Microprobe oxides and normalized crystal chemistry for DDH673-376.8 Distance (µ) 2.55 3.06 3.56 4.07 4.58
Na2O 0.408162 0.423888 0.421482 0.478739 0.473774 MgO 14.55595 14.38833 14.76061 14.88309 15.03837
Al2O3 3.359402 3.715355 3.844183 3.900386 3.959491 SiO2 52.94041 52.49299 52.44128 52.47442 52.26669 K2O 0.175183 0.193389 0.176893 0.199738 0.188215 CaO 12.65911 12.73792 12.68481 12.7293 12.86726 TiO2 0.199635 0.21503 0.245183 0.225789 0.22195 MnO 0.249485 0.158026 0.141517 0.098744 0.117438 FeO 15.73143 15.38431 14.90993 14.85579 14.35876
F 0.00001 0.00001 0.0121 0.00001 0.058975 Cl 0.161335 0.202463 0.196504 0.213148 0.214511
Cr2O3 0.028801 0.000015 0.003083 0.000015 0.014433 Total 100.4689 99.91173 99.83759 100.0592 99.77985
Si (T) 7.47 7.46 7.43 7.42 7.41 Al (T) 0.53 0.54 0.57 0.58 0.59
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.03 0.08 0.07 0.07 0.08 Fe3 (VI) 0.49 0.38 0.45 0.44 0.38 Fe2 (VI) 1.37 1.45 1.32 1.32 1.32 Mg (VI) 3.06 3.05 3.12 3.14 3.18
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.03 0.02 0.02 0.01 0.01
Ti (VI) 0.02 0.02 0.03 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.91 1.94 1.93 1.93 1.96 Na (VIII) 0.09 0.06 0.07 0.07 0.04
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.03 0.06 0.04 0.06 0.09 K (A) 0.03 0.04 0.03 0.04 0.03
VAC (A) 0.94 0.91 0.93 0.90 0.88 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.96 1.95 1.95 1.95 1.92 F (X) 0.00 0.00 0.01 0.00 0.03 Cl (X) 0.04 0.05 0.05 0.05 0.05 Total 2.00 2.00 2.00 2.00 2.00
Table 4 Continued: Microprobe oxides and normalized crystal chemistry for DDH673-376.8 Distance (µ) 5.09 5.6 6.11 6.62 7.13
Na2O 0.442132 0.512275 0.518661 0.479107 0.456026 MgO 15.28259 15.30001 15.39255 15.39272 15.20216
Al2O3 3.942601 4.02721 3.924323 3.97318 3.866466 SiO2 52.54899 52.58978 52.86752 52.19217 52.36048 K2O 0.20767 0.210552 0.200102 0.218312 0.184264 CaO 12.80655 12.6964 12.84857 12.84384 12.79669 TiO2 0.234081 0.24513 0.231105 0.242594 0.244033 MnO 0.062146 0.11445 0.115825 0.086368 0.120327 FeO 14.24932 14.02949 14.02057 13.8183 13.71777
F 0.110959 0.048646 0.227365 0.00001 0.00001 Cl 0.200165 0.200163 0.216837 0.2111 0.199427
Cr2O3 0.00166 0.000015 0.000015 0.007231 0.001538 Total 100.0889 99.97411 100.5634 99.46493 99.14919
Si (T) 7.42 7.42 7.44 7.40 7.45 Al (T) 0.58 0.58 0.56 0.60 0.55
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.07 0.09 0.09 0.07 0.10 Fe3 (VI) 0.43 0.43 0.38 0.40 0.33 Fe2 (VI) 1.25 1.23 1.27 1.24 1.30 Mg (VI) 3.21 3.22 3.23 3.26 3.23
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.02 0.03 0.02 0.03 0.03 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.94 1.92 1.94 1.95 1.95 Na (VIII) 0.06 0.08 0.06 0.05 0.05
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.06 0.06 0.08 0.08 0.08 K (A) 0.04 0.04 0.04 0.04 0.03
VAC (A) 0.91 0.90 0.89 0.88 0.89 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.90 1.93 1.85 1.95 1.95 F (X) 0.05 0.02 0.10 0.00 0.00 Cl (X) 0.05 0.05 0.05 0.05 0.05 Total 2.00 2.00 2.00 2.00 2.00
Table 4 Continued: Microprobe oxides and normalized crystal chemistry for DDH673-376.8 Distance (µ) 7.64 8.15 8.66 9.17 9.67
Na2O 0.481154 0.457539 0.388452 0.440991 0.365737 MgO 15.4275 15.67463 15.76145 15.66146 15.75693
Al2O3 3.745101 3.641818 3.553113 3.502499 3.503314 SiO2 52.57456 52.74845 52.96543 52.73114 52.92246 K2O 0.189162 0.179674 0.193066 0.17316 0.1815 CaO 12.78398 12.92563 12.89273 12.76454 12.86321 TiO2 0.233011 0.234508 0.219969 0.239299 0.223788 MnO 0.088516 0.077727 0.092318 0.08154 0.080185 FeO 13.56013 13.37833 13.1098 13.2302 13.13558
F 0.099339 0.209359 0.049038 0.022731 0.00001 Cl 0.209778 0.168208 0.194513 0.198566 0.177945
Cr2O3 0.012142 0.009095 0.009562 0.01807 0.006854 Total 99.40437 99.70496 99.42944 99.06419 99.21752
Si (T) 7.46 7.47 7.50 7.49 7.50 Al (T) 0.54 0.53 0.50 0.51 0.50
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.09 0.07 0.09 0.08 0.08 Fe3 (VI) 0.34 0.33 0.32 0.34 0.33 Fe2 (VI) 1.27 1.25 1.23 1.23 1.22 Mg (VI) 3.26 3.31 3.33 3.32 3.33
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.02 0.02 0.02 0.03 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.94 1.96 1.95 1.94 1.95 Na (VIII) 0.06 0.04 0.05 0.06 0.05
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.08 0.09 0.06 0.06 0.05 K (A) 0.03 0.03 0.03 0.03 0.03
VAC (A) 0.89 0.88 0.90 0.90 0.91 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.90 1.87 1.93 1.94 1.96 F (X) 0.04 0.09 0.02 0.01 0.00 Cl (X) 0.05 0.04 0.05 0.05 0.04 Total 2.00 2.00 2.00 2.00 2.00
Table 4 Continued: Microprobe oxides and normalized crystal chemistry for DDH673-376.8 Distance (µ) 10.18 10.69 11.2 11.71 12.22
Na2O 0.397179 0.419068 0.452505 0.431625 0.357185 MgO 15.64601 15.71471 15.67726 15.64084 15.53106
Al2O3 3.565337 3.47147 3.592242 3.480875 3.619801 SiO2 52.75032 52.78931 52.90253 52.91132 52.8401 K2O 0.176522 0.18503 0.184607 0.173976 0.171346 CaO 12.87965 12.84021 12.79866 12.83519 12.85929 TiO2 0.23404 0.218335 0.229449 0.256881 0.226056 MnO 0.083662 0.096856 0.107568 0.107684 0.106022 FeO 13.20909 13.18159 13.30209 13.1764 13.22409
F 0.00001 0.022753 0.00001 0.073503 0.131189 Cl 0.184707 0.165884 0.186138 0.180336 0.194561
Cr2O3 0.002727 0.003686 0.007702 0.004289 0.000015 Total 99.12926 99.1089 99.44077 99.27291 99.2607
Si (T) 7.49 7.49 7.48 7.51 7.50 Al (T) 0.51 0.51 0.52 0.49 0.50
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.09 0.07 0.08 0.09 0.11 Fe3 (VI) 0.32 0.33 0.35 0.30 0.30 Fe2 (VI) 1.25 1.23 1.23 1.26 1.27 Mg (VI) 3.31 3.33 3.31 3.31 3.29
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.03 0.02 0.02 0.03 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.96 1.95 1.94 1.95 1.96 Na (VIII) 0.04 0.05 0.06 0.05 0.04
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.07 0.07 0.06 0.07 0.05 K (A) 0.03 0.03 0.03 0.03 0.03
VAC (A) 0.90 0.90 0.90 0.90 0.91 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.96 1.95 1.96 1.92 1.89 F (X) 0.00 0.01 0.00 0.03 0.06 Cl (X) 0.04 0.04 0.04 0.04 0.05 Total 2.00 2.00 2.00 2.00 2.00
Table 4 Continued: Microprobe oxides and normalized crystal chemistry for DDH673-376.8 Distance (µ) 12.73 13.24 13.75 14.26 14.76
Na2O 0.408381 0.351796 0.342956 0.357261 0.380009 MgO 15.60645 15.76653 15.78032 15.86888 15.8658
Al2O3 3.513559 3.470657 3.436912 3.361399 3.302072 SiO2 52.81885 52.88058 52.82555 53.19252 53.18951 K2O 0.158067 0.192428 0.160569 0.161543 0.164689 CaO 12.86178 12.82919 12.83973 12.807 12.90865 TiO2 0.247032 0.231615 0.251074 0.218685 0.253259 MnO 0.09757 0.125158 0.115753 0.077442 0.088766 FeO 13.3606 13.20102 13.0396 13.0709 12.99801
F 0.005247 0.078773 0.154035 0.056065 0.078919 Cl 0.199725 0.186532 0.17528 0.186033 0.176764
Cr2O3 0.007015 0.000015 0.000015 0.006796 0.000015 Total 99.28426 99.31429 99.12179 99.36452 99.40645
Si (T) 7.49 7.49 7.50 7.52 7.53 Al (T) 0.51 0.51 0.50 0.48 0.47
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.08 0.07 0.07 0.08 0.08 Fe3 (VI) 0.33 0.37 0.35 0.35 0.29 Fe2 (VI) 1.25 1.19 1.20 1.19 1.24 Mg (VI) 3.30 3.33 3.34 3.34 3.35
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.02 0.01 0.01 0.01
Ti (VI) 0.03 0.02 0.03 0.02 0.03 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.95 1.95 1.95 1.94 1.96 Na (VIII) 0.05 0.05 0.05 0.06 0.04
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.07 0.04 0.05 0.04 0.06 K (A) 0.03 0.03 0.03 0.03 0.03
VAC (A) 0.90 0.92 0.92 0.93 0.91 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.95 1.92 1.89 1.93 1.92 F (X) 0.00 0.04 0.07 0.03 0.04 Cl (X) 0.05 0.04 0.04 0.04 0.04 Total 2.00 2.00 2.00 2.00 2.00
The crystal chemistry values are from normalization routine 13eCNK. Values for BaO, S03, P2O5, V2O3, Sc2O3, NiO, CoO, ZnO, SrO, Ga2O3, SnO, and CrO were not analyzed with this sample.
Table 5: Microprobe oxides and normalized crystal chemistry for DDH643-555.5 Distance (µ) 0 0.98 2.2 2.95 3.93
Na2O 0.287009 0.212233 0.269898 0.26797 0.347931 MgO 16.10707 16.16111 15.65491 14.89329 14.52678
Al2O3 2.736518 2.609233 2.606664 3.119677 3.383566 SiO2 52.40801 53.67068 52.41477 51.59157 50.84804 K2O 0.16251 0.165902 0.211922 0.229136 0.300104 CaO 12.58959 12.40059 12.66402 12.47091 12.39353 TiO2 0.054768 0.037434 0.033618 0.056676 0.066948 MnO 0.091738 0.122977 0.104829 0.097466 0.115891 FeO 12.22146 12.29539 12.10623 13.3659 14.74549
F 0.060765 0.021662 0.096337 0.105839 0.056424 Cl 0.282076 0.303644 0.340188 0.372914 0.396501
Cr2O3 0.002818 0.002304 0.001274 0.001424 0.00631 Total 97.13262 98.11849 96.643 96.6788 97.32754
Si (T) 7.56 7.69 7.64 7.55 7.42 Al (T) 0.43 0.30 0.35 0.45 0.57
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.03 0.14 0.09 0.09 0.01 Fe3 (VI) 0.37 0.06 0.16 0.30 0.50 Fe2 (VI) 1.11 1.42 1.31 1.33 1.30 Mg (VI) 3.47 3.36 3.40 3.25 3.16
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.01 0.00 0.00 0.01 0.01 Sc (VI) 0.01 0.01 0.01 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.10 0.00 0.00 0.00 Ca (VIII) 1.95 1.90 1.98 1.96 1.94 Na (VIII) 0.05 0.00 0.02 0.04 0.06
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.03 0.06 0.05 0.03 0.04 K (A) 0.03 0.03 0.04 0.04 0.06
VAC (A) 0.94 0.91 0.90 0.92 0.90 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.90 1.92 1.87 1.86 1.88 F (X) 0.03 0.01 0.04 0.05 0.03 Cl (X) 0.07 0.07 0.08 0.09 0.10 Total 2.00 2.00 2.00 2.00 2.00
Table 5 continued: Microprobe oxides and normalized crystal chemistry for DDH643-555.5 Distance (µ) 5.01 5.89 6.88 7.86 8.84
Na2O 0.440451 0.452692 0.477658 0.540967 0.550938 MgO 13.85717 13.59122 13.38689 13.35596 13.22397
Al2O3 3.766688 3.92723 4.114139 4.367727 4.468776 SiO2 50.47624 49.87773 49.7136 49.49511 49.38494 K2O 0.353972 0.382668 0.402671 0.425468 0.459806 CaO 12.16555 12.19038 12.18114 12.19531 12.16523 TiO2 0.074799 0.068929 0.077251 0.094116 0.103532 MnO 0.090074 0.111927 0.100352 0.108642 0.145637 FeO 15.75359 15.784 16.11042 16.11966 16.16055
F 0.048534 0.040017 0.057415 0.077468 0.010523 Cl 0.437832 0.481076 0.503991 0.524528 0.481575
Cr2O3 0.005244 0.004957 0.006225 0.003828 0.002216 Total 97.5722 97.03063 97.24844 97.39343 97.26689
Si (T) 7.38 7.35 7.33 7.29 7.28 Al (T) 0.62 0.64 0.67 0.71 0.71
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.03 0.04 0.04 0.05 0.06 Fe3 (VI) 0.56 0.52 0.54 0.54 0.53 Fe2 (VI) 1.37 1.42 1.45 1.44 1.46 Mg (VI) 3.02 2.99 2.94 2.93 2.91
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.02
Ti (VI) 0.01 0.01 0.01 0.01 0.01 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.91 1.93 1.92 1.92 1.92 Na (VIII) 0.09 0.07 0.08 0.08 0.08
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.03 0.06 0.06 0.08 0.08 K (A) 0.07 0.07 0.08 0.08 0.09
VAC (A) 0.90 0.87 0.86 0.84 0.83 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.87 1.86 1.85 1.83 1.87 F (X) 0.02 0.02 0.03 0.04 0.00 Cl (X) 0.11 0.12 0.13 0.13 0.12 Total 2.00 2.00 2.00 2.00 2.00
Table 5 continued: Microprobe oxides and normalized crystal chemistry for DDH643-555.5 Distance (µ) 9.82 10.81 11.79 12.77 13.75
Na2O 0.48291 0.193456 0.17523 0.20637 0.202371 MgO 13.51221 15.17494 15.4207 15.94684 16.09793
Al2O3 4.167784 1.719176 1.830549 1.944489 2.021532 SiO2 50.36562 53.64281 53.55624 53.30651 53.68781 K2O 0.406051 0.108166 0.090965 0.104865 0.106458 CaO 12.06904 12.34585 12.50065 12.50793 12.57591 TiO2 0.09018 0.046614 0.095855 0.111541 0.136455 MnO 0.167994 0.233921 0.164112 0.100375 0.101787 FeO 15.49293 11.41357 11.51912 11.65987 11.69249
F 0.044904 0.053833 0.094456 0.06774 0.065609 Cl 0.253767 0.091989 0.087651 0.092139 0.096046
Cr2O3 0.000904 0.004567 0.005012 0.005077 0.003614 Total 97.14985 95.12344 95.63325 96.15733 96.882
Si (T) 7.39 7.89 7.85 7.75 7.75 Al (T) 0.61 0.11 0.15 0.24 0.25
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.11 0.19 0.16 0.09 0.09 Fe3 (VI) 0.47 0.00 0.00 0.14 0.15 Fe2 (VI) 1.43 1.40 1.41 1.28 1.26 Mg (VI) 2.95 3.33 3.37 3.46 3.46
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.02 0.03 0.02 0.01 0.01
Ti (VI) 0.01 0.01 0.01 0.01 0.01 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 4.96 4.98 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.90 1.95 1.96 1.95 1.94 Na (VIII) 0.10 0.05 0.04 0.05 0.06
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.03 0.00 0.01 0.01 0.00 K (A) 0.08 0.02 0.02 0.02 0.02
VAC (A) 0.89 0.98 0.97 0.97 0.98 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.92 1.95 1.93 1.95 1.95 F (X) 0.02 0.03 0.04 0.03 0.03 Cl (X) 0.06 0.02 0.02 0.02 0.02 Total 2.00 2.00 2.00 2.00 2.00
Table 5 continued: Microprobe oxides and normalized crystal chemistry for DDH643-555.5 Distance (µ) 14.74 15.72 16.7 17.68 18.66
Na2O 0.210594 0.235403 0.278751 0.266813 0.218256 MgO 16.19386 16.45159 16.337 16.60188 16.392
Al2O3 2.137289 2.13234 2.167007 2.14666 2.17007 SiO2 53.53266 53.72642 53.09923 53.51255 53.75572 K2O 0.119801 0.122454 0.126372 0.118091 0.111616 CaO 12.69156 12.50931 12.48836 12.43561 12.58005 TiO2 0.13787 0.179363 0.199516 0.199972 0.18337 MnO 0.117771 0.07621 0.079519 0.08015 0.077452 FeO 11.64333 11.61915 11.44201 11.4248 11.41015
F 0.070494 0.06336 0.090613 0.08498 0.086715 Cl 0.093352 0.099834 0.101783 0.100161 0.098169
Cr2O3 0.004845 0.003525 0.003896 0.004302 0.004096 Total 97.0473 97.321 96.52431 97.08208 97.21858
Si (T) 7.72 7.74 7.68 7.72 7.72 Al (T) 0.28 0.26 0.32 0.28 0.28
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.08 0.10 0.05 0.09 0.08 Fe3 (VI) 0.16 0.02 0.23 0.04 0.19 Fe2 (VI) 1.25 1.38 1.15 1.34 1.18 Mg (VI) 3.48 3.46 3.52 3.49 3.51
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.01 0.02 0.02 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.07 0.00 0.08 0.00 Ca (VIII) 1.96 1.93 1.94 1.92 1.93 Na (VIII) 0.04 0.00 0.06 0.00 0.06
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.02 0.07 0.01 0.07 0.00 K (A) 0.02 0.02 0.02 0.02 0.02
VAC (A) 0.96 0.91 0.96 0.90 0.98 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.95 1.95 1.93 1.94 1.94 F (X) 0.03 0.03 0.04 0.04 0.04 Cl (X) 0.02 0.02 0.02 0.02 0.02 Total 2.00 2.00 2.00 2.00 2.00
Table 5 continued: Microprobe oxides and normalized crystal chemistry for DDH643-555.5 Distance (µ) 19.65
Na2O 0.242991
MgO 16.49746
Al2O3 2.281999
SiO2 53.5663
K2O 0.125191
CaO 12.6449
TiO2 0.207579
MnO 0.083351
FeO 11.59051
F 0.084827
Cl 0.096804
Cr2O3 0.001028
Total 97.53289
Si (T) 7.67
Al (T) 0.33
Total T 8.00
Al (VI) 0.05
Fe3 (VI) 0.25
Fe2 (VI) 1.13
Mg (VI) 3.52
Mn3 (VI) 0.00
Mn2 (VI) 0.01
Ti (VI) 0.02
Sc (VI) 0.00
Total (VI) 5.00
Fe2 (VIII) 0.00
Mn2 (VIII) 0.00
Mg (VIII) 0.00
Ca (VIII) 1.94
Na (VIII) 0.06
Total 2.00
Na (A) 0.01
K (A) 0.02
VAC (A) 0.97
Total 1.00
OH (X) 1.94
F (X) 0.04
Cl (X) 0.02
Total 2.00
The crystal chemistry values are from normalization routine 13eCNK. Values for BaO, S03, P2O5, V2O3, Sc2O3, NiO, CoO, ZnO, SrO, Ga2O3, SnO, and CrO were analyzed but the normalized values of
V, Cr, Ga, Co, Ni, Cu, Zn, Zr, S, P, Sn, Sr, Ba, And Y were below 0.01 and not reported in this table.
Table 6: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 1 Distance (µ) 0 0.5 1 1.5 2.01
Na2O 0.124188 0.131647 0.161532 0.096286 0.132225 MgO 15.43566 15.82126 15.34364 14.68176 14.42008
Al2O3 1.46826 1.261785 1.629474 1.153458 1.039538 SiO2 53.56938 53.72037 53.95241 53.29184 53.71281 K2O 0.059476 0.044267 0.070982 0.055795 0.065175 CaO 12.56593 12.67766 12.55667 12.32495 12.37114 TiO2 0.04042 0.022248 0.028014 0.071703 0.052387 MnO 0.214987 0.248788 0.226249 0.227248 0.26992 FeO 13.36833 13.35207 13.72995 14.21705 15.10472
F 0.042148 0.045188 0.039173 0.024084 0.037288 Cl 0.024945 0.022554 0.018316 0.026107 0.049583
Cr2O3 0.00383 0.006721 0.003412 0.00453 0.004595 Total 97.01707 97.46828 97.86226 96.28015 97.39112
Si (T) 7.76 7.74 7.75 7.81 7.81 Al (T) 0.24 0.21 0.25 0.19 0.18
Total T 8.00 7.95 8.00 8.00 7.99
Al (VI) 0.01 0.00 0.03 0.01 0.00 Fe3 (VI) 0.27 0.33 0.28 0.25 0.27 Fe2 (VI) 1.35 1.28 1.37 1.49 1.57 Mg (VI) 3.33 3.35 3.29 3.21 3.12
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.03 0.03 0.03 0.03 0.03
Ti (VI) 0.00 0.00 0.00 0.01 0.01 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.05 0.00 0.00 0.01 Ca (VIII) 1.95 1.96 1.93 1.93 1.93 Na (VIII) 0.03 0.00 0.04 0.03 0.04
Total 1.98 2.00 1.98 1.96 1.97
Na (A) 0.00 0.04 0.00 0.00 0.00 K (A) 0.01 0.01 0.01 0.01 0.01
VAC (A) 0.99 0.95 0.99 0.99 0.99 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.97 1.97 1.98 1.98 1.97 F (X) 0.02 0.02 0.02 0.01 0.02 Cl (X) 0.01 0.01 0.00 0.01 0.01 Total 2.00 2.00 2.00 2.00 2.00
Table 6 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 1 Distance (µ) 2.51 3.01 3.51 4.01 4.51
Na2O 0.145725 0.145951 0.130504 0.238145 0.290429 MgO 14.25298 14.59661 14.3236 15.3197 16.95057
Al2O3 1.111166 1.28432 1.20603 2.187879 2.744884 SiO2 53.38709 53.36925 53.45059 52.93176 52.78889 K2O 0.062361 0.077084 0.077634 0.11029 0.128691 CaO 12.30003 12.32835 12.32568 12.47706 12.57995 TiO2 0.071575 0.099982 0.068889 0.204643 0.210447 MnO 0.270287 0.254536 0.253896 0.206464 0.111567 FeO 14.55312 14.10391 14.36565 12.25973 11.0372
F 0.012295 0.027248 0.06392 0.013726 0.064553 Cl 0.050561 0.052607 0.048257 0.075143 0.102522
Cr2O3 0.004951 0.004086 0.004618 0.004423 0.002955 Total 96.32806 96.44 96.43168 96.13532 97.10756
Si (T) 7.84 7.81 7.84 7.73 7.55 Al (T) 0.15 0.19 0.15 0.27 0.44
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.04 0.04 0.05 0.11 0.02 Fe3 (VI) 0.16 0.19 0.14 0.11 0.41 Fe2 (VI) 1.63 1.54 1.62 1.39 0.92 Mg (VI) 3.12 3.19 3.13 3.34 3.62
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.03 0.03 0.03 0.03 0.01
Ti (VI) 0.01 0.01 0.01 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.94 1.93 1.94 1.95 1.93 Na (VIII) 0.04 0.04 0.04 0.05 0.07
Total 1.98 1.98 1.98 2.00 2.00
Na (A) 0.00 0.00 0.00 0.02 0.01 K (A) 0.01 0.01 0.01 0.02 0.02
VAC (A) 0.99 0.98 0.98 0.96 0.97 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.98 1.97 1.96 1.98 1.95 F (X) 0.01 0.01 0.03 0.01 0.03 Cl (X) 0.01 0.01 0.01 0.02 0.02 Total 2.00 2.00 2.00 2.00 2.00
Table 6 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 1 Distance (µ) 5.01 5.52 6.02 6.52 7.02
Na2O 0.288656 0.262609 0.301167 0.278148 0.294483 MgO 16.78955 16.86835 16.87154 16.76071 16.69034
Al2O3 2.727419 2.738327 2.808064 2.827103 2.888112 SiO2 52.60579 52.7618 52.66639 52.7476 52.41558 K2O 0.142599 0.132992 0.125679 0.127848 0.124784 CaO 12.62733 12.59123 12.63602 12.47946 12.64222 TiO2 0.209527 0.189293 0.190127 0.184374 0.18667 MnO 0.083325 0.071165 0.101396 0.083098 0.095152 FeO 11.18346 11.20607 11.43079 11.38011 11.31483
F 0.092443 0.058638 0.067396 0.087349 0.046455 Cl 0.104831 0.105447 0.102102 0.110657 0.109799
Cr2O3 0.003437 0.002452 0.003295 0.003962 0.003684 Total 96.93964 97.09879 97.40619 97.17768 96.89837
Si (T) 7.56 7.56 7.53 7.55 7.53 Al (T) 0.44 0.44 0.47 0.45 0.46
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.02 0.02 0.00 0.03 0.02 Fe3 (VI) 0.37 0.41 0.44 0.44 0.39 Fe2 (VI) 0.97 0.94 0.92 0.92 0.97 Mg (VI) 3.60 3.60 3.59 3.57 3.58
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.02 0.02 0.02 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.94 1.93 1.93 1.91 1.95 Na (VIII) 0.06 0.07 0.07 0.08 0.05
Total 2.00 2.00 2.00 1.99 2.00
Na (A) 0.02 0.01 0.02 0.00 0.03 K (A) 0.03 0.02 0.02 0.02 0.02
VAC (A) 0.95 0.97 0.96 0.97 0.95 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.93 1.95 1.94 1.93 1.95 F (X) 0.04 0.03 0.03 0.04 0.02 Cl (X) 0.03 0.03 0.02 0.03 0.03 Total 2.00 2.00 2.00 2.00 2.00
Table 6 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 1 Distance (µ) 7.52 8.02 8.53 9.03 9.53
Na2O 0.304051 0.344628 0.36427 0.368279 0.364371 MgO 16.79421 16.62755 16.92573 16.44981 16.40588
Al2O3 2.89768 3.007605 3.079923 3.103014 3.221648 SiO2 52.45288 52.29482 52.51835 52.2137 52.43023 K2O 0.143338 0.147226 0.138036 0.133294 0.135159 CaO 12.54535 12.53988 12.6249 12.62627 12.62648 TiO2 0.181106 0.20122 0.198386 0.201662 0.217928 MnO 0.060664 0.112573 0.090191 0.076757 0.098971 FeO 11.25918 11.25603 11.25051 11.52201 11.3765
F 0.050665 0.099155 0.099519 0.062232 0.084966 Cl 0.112101 0.111036 0.116145 0.11535 0.11951
Cr2O3 0.004291 0.002224 0.001962 0.004483 0.002527 Total 96.89725 96.83778 97.5024 96.97023 97.17344
Si (T) 7.53 7.52 7.50 7.52 7.53 Al (T) 0.47 0.47 0.50 0.48 0.47
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.02 0.04 0.02 0.04 0.08 Fe3 (VI) 0.43 0.39 0.44 0.36 0.32 Fe2 (VI) 0.92 0.96 0.90 1.03 1.05 Mg (VI) 3.59 3.57 3.60 3.53 3.51
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.02 0.02 0.02 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.93 1.93 1.93 1.95 1.94 Na (VIII) 0.07 0.07 0.07 0.05 0.06
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.01 0.03 0.03 0.05 0.04 K (A) 0.03 0.03 0.03 0.02 0.02
VAC (A) 0.96 0.94 0.94 0.92 0.93 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.95 1.93 1.93 1.94 1.93 F (X) 0.02 0.05 0.04 0.03 0.04 Cl (X) 0.03 0.03 0.03 0.03 0.03 Total 2.00 2.00 2.00 2.00 2.00
Table 6 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 1 Distance (µ) 10.03 10.53 11.03 11.53 12.04
Na2O 0.347917 0.385058 0.395488 0.363744 0.329936 MgO 16.30459 16.5194 16.36086 16.34169 16.56752
Al2O3 3.164592 3.241377 3.250029 3.256594 3.079368 SiO2 52.10678 52.05676 51.80301 51.85868 51.89906 K2O 0.13892 0.137864 0.117925 0.151233 0.138746 CaO 12.50324 12.58503 12.49677 12.51524 12.60611 TiO2 0.198932 0.199245 0.202823 0.200803 0.188959 MnO 0.108736 0.094037 0.062539 0.093994 0.096685 FeO 11.28087 11.24648 11.13987 10.87431 10.7798
F 0.061113 0.069043 0.055492 0.083942 0.056206 Cl 0.120019 0.119897 0.116166 0.117245 0.135332
Cr2O3 0.003583 0.00342 0.004525 0.003235 0.003316 Total 96.43362 96.75699 96.10753 95.95107 95.9615
Si (T) 7.54 7.50 7.51 7.54 7.54 Al (T) 0.46 0.50 0.48 0.46 0.46
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.08 0.05 0.07 0.10 0.06 Fe3 (VI) 0.33 0.37 0.33 0.28 0.30 Fe2 (VI) 1.03 0.99 1.02 1.04 1.00 Mg (VI) 3.52 3.55 3.54 3.54 3.59
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.02 0.02 0.02 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.94 1.94 1.94 1.95 1.96 Na (VIII) 0.06 0.06 0.06 0.05 0.04
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.04 0.05 0.05 0.05 0.05 K (A) 0.03 0.03 0.02 0.03 0.03
VAC (A) 0.94 0.92 0.92 0.92 0.92 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.94 1.94 1.95 1.93 1.94 F (X) 0.03 0.03 0.03 0.04 0.03 Cl (X) 0.03 0.03 0.03 0.03 0.03 Total 2.00 2.00 2.00 2.00 2.00
Table 6 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 1 Distance (µ) 12.54 13.04
Na2O 0.301774 0.275662
MgO 16.99285 17.17798
Al2O3 2.95508 2.683072
SiO2 52.49677 52.61824
K2O 0.128771 0.135649
CaO 12.60902 12.63974
TiO2 0.220886 0.21595
MnO 0.105415 0.084302
FeO 10.68676 10.4008
F 0.081642 0.086219
Cl 0.119122 0.117599
Cr2O3 0.00493 0.001763
Total 96.7928 96.53176
Si (T) 7.54 7.57
Al (T) 0.46 0.43
Total T 8.00 8.00
Al (VI) 0.04 0.02
Fe3 (VI) 0.38 0.35
Fe2 (VI) 0.90 0.90
Mg (VI) 3.64 3.68
Mn3 (VI) 0.00 0.00
Mn2 (VI) 0.01 0.01
Ti (VI) 0.02 0.02
Sc (VI) 0.00 0.00
Total (VI) 5.00 5.00
Fe2 (VIII) 0.00 0.00
Mn2 (VIII) 0.00 0.00
Mg (VIII) 0.00 0.00
Ca (VIII) 1.94 1.95
Na (VIII) 0.06 0.05
Total 2.00 2.00
Na (A) 0.02 0.02
K (A) 0.02 0.02
VAC (A) 0.95 0.95
Total 1.00 1.00
OH (X) 1.93 1.93
F (X) 0.04 0.04
Cl (X) 0.03 0.03
Total 2.00 2.00
The crystal chemistry values are from normalization routine 13eCNK. Values for BaO, S03, P2O5, V2O3, Sc2O3, NiO, CoO, ZnO, SrO, Ga2O3, SnO, and CrO were analyzed but the normalized values of
V, Cr, Ga, Co, Ni, Cu, Zn, Zr, S, P, Sn, Sr, Ba, And Y were below 0.01 and not reported in this table.
Table 7: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 3 Distance (µ) 0 0.5 1 1.51 2.01
Na2O 0.255558 0.18866 0.133751 0.131519 0.082341 MgO 15.6691 15.53198 15.21335 14.89038 14.83903
Al2O3 1.595021 1.337254 1.179283 1.085852 1.089694 SiO2 52.87681 53.10532 53.08377 53.08326 53.50794 K2O 0.071833 0.07241 0.053584 0.053831 0.051922 CaO 12.16159 12.38291 12.55566 12.36372 12.37108 TiO2 0.034961 0.043875 0.010734 0.024498 0.039021 MnO 0.252541 0.273638 0.267494 0.330054 0.303793 FeO 13.02463 13.08735 13.5029 14.50978 14.55941
F 0.005415 0.046859 0.017983 0.023132 0.021232 Cl 0.084691 0.071032 0.07695 0.053098 0.044576
Cr2O3 0.003435 0.003822 0.005636 0.004051 0.004543 Total 96.15991 96.26161 96.23116 96.65363 97.0218
Si (T) 7.69 7.75 7.77 7.75 7.78 Al (T) 0.27 0.23 0.20 0.19 0.19
Total T 7.97 7.98 7.98 7.94 7.96
Al (VI) 0.00 0.00 0.00 0.00 0.00 Fe3 (VI) 0.43 0.31 0.23 0.38 0.35 Fe2 (VI) 1.15 1.28 1.42 1.39 1.42 Mg (VI) 3.37 3.36 3.30 3.18 3.18
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.03 0.03 0.03 0.04 0.04
Ti (VI) 0.00 0.00 0.00 0.00 0.00 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.03 0.02 0.02 0.06 0.04 Ca (VIII) 1.90 1.94 1.97 1.93 1.93 Na (VIII) 0.07 0.04 0.01 0.00 0.02
Total 2.00 2.00 2.00 2.00 1.98
Na (A) 0.00 0.01 0.03 0.03 0.00 K (A) 0.01 0.01 0.01 0.01 0.01
VAC (A) 0.98 0.97 0.96 0.96 0.99 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.98 1.96 1.97 1.98 1.98 F (X) 0.00 0.02 0.01 0.01 0.01 Cl (X) 0.02 0.02 0.02 0.01 0.01 Total 2.00 2.00 2.00 2.00 2.00
Table 7 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 3 Distance (µ) 2.51 3.01 3.51 4.02 4.52
Na2O 0.175338 0.256944 0.272841 0.451785 0.480676 MgO 14.55688 14.33457 14.44087 14.84125 15.23904
Al2O3 1.508446 1.841977 2.465327 3.777301 4.063733 SiO2 52.97834 52.3985 51.70597 50.43498 50.78951 K2O 0.0766 0.098151 0.104401 0.167267 0.173084 CaO 12.22121 12.0983 12.07601 12.28517 12.35143 TiO2 0.051904 0.066586 0.100695 0.146201 0.158612 MnO 0.369041 0.332989 0.31907 0.125073 0.097632 FeO 15.42449 15.1082 15.08744 13.98666 13.26859
F 0.070443 0.018598 0.006678 0.008767 0.065758 Cl 0.038964 0.050811 0.029779 0.03239 0.054997
Cr2O3 0.006818 0.005539 0.005035 0.007255 0.004882 Total 97.56429 96.71215 96.7182 96.38569 96.87395
Si (T) 7.67 7.66 7.54 7.37 7.36 Al (T) 0.26 0.32 0.42 0.63 0.64
Total T 7.93 7.97 7.96 8.00 8.00
Al (VI) 0.00 0.00 0.00 0.02 0.06 Fe3 (VI) 0.52 0.46 0.60 0.56 0.52 Fe2 (VI) 1.35 1.38 1.24 1.14 1.08 Mg (VI) 3.07 3.10 3.10 3.23 3.29
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.05 0.04 0.04 0.02 0.01
Ti (VI) 0.01 0.01 0.01 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.07 0.03 0.04 0.00 0.00 Ca (VIII) 1.90 1.89 1.89 1.92 1.92 Na (VIII) 0.03 0.07 0.08 0.08 0.08
Total 2.00 1.99 2.00 2.00 2.00
Na (A) 0.02 0.00 0.00 0.05 0.05 K (A) 0.01 0.02 0.02 0.03 0.03
VAC (A) 0.97 0.98 0.98 0.92 0.91 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.96 1.98 1.99 1.99 1.96 F (X) 0.03 0.01 0.00 0.00 0.03 Cl (X) 0.01 0.01 0.01 0.01 0.01 Total 2.00 2.00 2.00 2.00 2.00
Table 7 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 3 Distance (µ) 5.02 5.52 6.02 6.53 7.03
Na2O 0.50241 0.474705 0.458216 0.458339 0.421867 MgO 15.54626 15.50916 15.80972 16.09756 16.02263
Al2O3 4.109682 4.009792 3.952286 4.013048 3.869598 SiO2 50.36153 50.47868 50.55305 50.51099 50.53104 K2O 0.174433 0.175001 0.145657 0.169396 0.168341 CaO 12.40172 12.41851 12.31719 12.41052 12.47449 TiO2 0.148088 0.162271 0.156105 0.141426 0.144834 MnO 0.114508 0.085567 0.071562 0.085507 0.092739 FeO 12.74287 12.45608 12.23771 12.06408 12.02878
F 0.038963 0.069048 0.045307 0.02082 0.061375 Cl 0.075196 0.093708 0.107986 0.111386 0.109087
Cr2O3 0.0066 0.004878 0.003981 0.006211 0.006902 Total 96.34139 96.05486 95.97382 96.19466 96.03344
Si (T) 7.33 7.37 7.36 7.33 7.36 Al (T) 0.67 0.63 0.64 0.67 0.64
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.03 0.06 0.04 0.02 0.02 Fe3 (VI) 0.55 0.46 0.55 0.59 0.53 Fe2 (VI) 1.01 1.06 0.94 0.88 0.93 Mg (VI) 3.37 3.38 3.43 3.48 3.48
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.02 0.02 0.02 0.02 0.02 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.93 1.94 1.92 1.93 1.95 Na (VIII) 0.07 0.06 0.08 0.07 0.05
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.08 0.08 0.05 0.06 0.06 K (A) 0.03 0.03 0.03 0.03 0.03
VAC (A) 0.89 0.89 0.92 0.91 0.90 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.96 1.94 1.95 1.96 1.94 F (X) 0.02 0.03 0.02 0.01 0.03 Cl (X) 0.02 0.02 0.03 0.03 0.03 Total 2.00 2.00 2.00 2.00 2.00
Table 7 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 3 Distance (µ) 7.53 8.03 8.54 9.04 9.54
Na2O 0.493815 0.482232 0.491994 0.428822 0.455158 MgO 16.00585 16.03854 16.14016 16.1452 16.18777
Al2O3 4.223752 4.031686 4.039726 3.874258 4.000408 SiO2 50.39448 50.32508 50.33794 50.59422 50.59677 K2O 0.155944 0.16511 0.150855 0.158318 0.149331 CaO 12.38986 12.36465 12.42413 12.42718 12.43877 TiO2 0.115316 0.14652 0.127053 0.138555 0.11984 MnO 0.068211 0.080159 0.07297 0.078071 0.060697 FeO 12.18648 12.00773 11.94625 11.85887 11.96976
F 0.070174 0.015486 0.113651 0.057423 0.0655 Cl 0.109729 0.105498 0.101517 0.101733 0.104885
Cr2O3 0.008277 0.006145 0.005358 0.003652 0.00523 Total 96.3183 95.87046 96.03848 95.96567 96.24893
Si (T) 7.31 7.33 7.32 7.36 7.34 Al (T) 0.69 0.67 0.68 0.64 0.66
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.03 0.02 0.02 0.02 0.02 Fe3 (VI) 0.60 0.58 0.58 0.55 0.58 Fe2 (VI) 0.88 0.88 0.87 0.89 0.87 Mg (VI) 3.46 3.48 3.50 3.50 3.50
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.01 0.02 0.01 0.02 0.01 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.93 1.93 1.94 1.94 1.93 Na (VIII) 0.07 0.07 0.06 0.06 0.07
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.06 0.07 0.08 0.06 0.06 K (A) 0.03 0.03 0.03 0.03 0.03
VAC (A) 0.91 0.90 0.90 0.91 0.91 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.94 1.97 1.92 1.95 1.94 F (X) 0.03 0.01 0.05 0.03 0.03 Cl (X) 0.03 0.03 0.03 0.03 0.03 Total 2.00 2.00 2.00 2.00 2.00
Table 7 continued: Microprobe oxides and normalized crystal chemistry for DDH628-480.3 area 3 Distance (µ) 10.04 10.54 11.05
Na2O 0.45259 0.456383 0.486985
MgO 16.02625 15.95768 16.076
Al2O3 4.076816 4.116143 4.094569
SiO2 49.93295 50.52214 50.20464
K2O 0.146318 0.147766 0.151819
CaO 12.3561 12.40912 12.39686
TiO2 0.118868 0.120194 0.11411
MnO 0.098932 0.058053 0.077808
FeO 11.71441 11.84327 11.88384
F 0.044294 0.051988 0.050248
Cl 0.107748 0.104214 0.10433
Cr2O3 0.006249 0.004462 0.005574
Total 95.16895 95.88638 95.74671
Si (T) 7.32 7.36 7.32
Al (T) 0.68 0.64 0.68
Total T 8.00 8.00 8.00
Al (VI) 0.03 0.07 0.03
Fe3 (VI) 0.57 0.51 0.57
Fe2 (VI) 0.86 0.93 0.87
Mg (VI) 3.50 3.46 3.49
Mn3 (VI) 0.00 0.00 0.00
Mn2 (VI) 0.01 0.01 0.01
Ti (VI) 0.01 0.01 0.01
Sc (VI) 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00
Mn2 (VIII) 0.00 0.00 0.00
Mg (VIII) 0.00 0.00 0.00
Ca (VIII) 1.94 1.94 1.94
Na (VIII) 0.06 0.06 0.06
Total 2.00 2.00 2.00
Na (A) 0.07 0.07 0.07
K (A) 0.03 0.03 0.03
VAC (A) 0.90 0.91 0.90
Total 1.00 1.00 1.00
OH (X) 1.95 1.95 1.95
F (X) 0.02 0.02 0.02
Cl (X) 0.03 0.03 0.03
Total 2.00 2.00 2.00
The crystal chemistry values are from normalization routine 13eCNK. Values for BaO, S03, P2O5, V2O3, Sc2O3, NiO, CoO, ZnO, SrO, Ga2O3, SnO, and CrO were analyzed but the normalized values of
V, Cr, Ga, Co, Ni, Cu, Zn, Zr, S, P, Sn, Sr, Ba, And Y were below 0.01 and not reported in this table.
Table 8: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 breccia Distance (µ) 0 0.5 1 1.5 2
Na2O 0.276688 0.247971 0.28343 0.386046 0.375872 MgO 14.94384 14.86842 14.84999 14.0323 13.99916
Al2O3 4.071506 4.066408 4.257202 4.444167 4.216791 SiO2 49.53284 49.57242 49.76262 48.92889 49.49532 K2O 0.167313 0.175534 0.176827 0.222134 0.2442 CaO 11.78134 11.81334 11.67719 11.11669 11.35327 TiO2 0.080033 0.060905 0.079042 0.04839 0.054881 MnO 0.110967 0.118386 0.09815 0.163188 0.139047 FeO 14.5574 14.42555 14.98422 15.40705 15.34512
F 0.044497 0.029824 0.004461 0.009952 0.019537 Cl 0.300381 0.315351 0.348061 0.446741 0.485622
Cr2O3 0.004521 0.008425 0.006346 0.003757 0.006047 Total 96.05783 95.88361 96.76093 95.37531 95.87373
Si (T) 7.23 7.25 7.21 7.21 7.28 Al (T) 0.70 0.70 0.73 0.77 0.72
Total T 7.93 7.95 7.93 7.98 8.00
Al (VI) 0.00 0.00 0.00 0.00 0.01 Fe3 (VI) 1.00 0.95 1.08 1.12 0.95 Fe2 (VI) 0.77 0.81 0.74 0.78 0.93 Mg (VI) 3.18 3.19 3.14 3.06 3.07
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.02 0.02
Ti (VI) 0.01 0.01 0.01 0.01 0.01 Sc (VI) 0.01 0.01 0.02 0.01 0.01
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.07 0.05 0.07 0.02 0.00 Ca (VIII) 1.84 1.85 1.81 1.75 1.79 Na (VIII) 0.08 0.07 0.08 0.11 0.11
Total 1.99 1.97 1.96 1.88 1.90
Na (A) 0.00 0.00 0.00 0.00 0.00 K (A) 0.03 0.03 0.03 0.04 0.05
VAC (A) 0.97 0.97 0.97 0.96 0.95 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.91 1.91 1.91 1.88 1.87 F (X) 0.02 0.01 0.00 0.00 0.01 Cl (X) 0.07 0.08 0.09 0.11 0.12 Total 2.00 2.00 2.00 2.00 2.00
Table 8 continued: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 breccia Distance (µ) 2.5 3 3.5 4 4.5
Na2O 0.360837 0.353317 0.44245 0.408322 0.324175 MgO 13.74302 13.73979 13.25991 12.89789 13.20297
Al2O3 3.889334 3.847445 4.347393 4.4231 4.479348 SiO2 49.81773 50.08559 49.27581 49.04765 49.12655 K2O 0.255862 0.289888 0.331925 0.322845 0.316008 CaO 11.9036 12.01279 12.05431 12.01397 11.94352 TiO2 0.050496 0.08216 0.079436 0.051842 0.058052 MnO 0.150863 0.163685 0.118996 0.131288 0.135769 FeO 15.69876 15.88171 15.87173 15.99512 15.92053
F 0.00001 0.00001 0.012224 0.016337 0.005813 Cl 0.492627 0.484903 0.482021 0.428134 0.399134
Cr2O3 0.0062 0.003291 0.003849 0.004142 0.006014 Total 96.54012 97.08603 96.42681 95.85023 96.03987
Si (T) 7.33 7.34 7.30 7.32 7.29 Al (T) 0.66 0.66 0.69 0.68 0.71
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.01 0.01 0.07 0.10 0.07 Fe3 (VI) 0.71 0.68 0.57 0.53 0.66 Fe2 (VI) 1.22 1.26 1.40 1.47 1.32 Mg (VI) 3.02 3.00 2.93 2.87 2.92
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.02 0.02 0.01 0.02 0.02
Ti (VI) 0.01 0.01 0.01 0.01 0.01 Sc (VI) 0.01 0.01 0.01 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.88 1.89 1.91 1.92 1.90 Na (VIII) 0.10 0.10 0.09 0.08 0.09
Total 1.98 1.99 2.00 2.00 1.99
Na (A) 0.00 0.00 0.04 0.04 0.00 K (A) 0.05 0.05 0.06 0.06 0.06
VAC (A) 0.95 0.94 0.89 0.90 0.94 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.88 1.88 1.87 1.88 1.90 F (X) 0.00 0.00 0.01 0.01 0.00 Cl (X) 0.12 0.12 0.12 0.11 0.10 Total 2.00 2.00 2.00 2.00 2.00
Table 8 continued: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 breccia Distance (µ) 5 5.5 6 6.5 7
Na2O 0.412872 0.473472 0.44172 0.498757 0.48135 MgO 13.61205 14.35674 14.73616 15.45263 16.01417
Al2O3 4.504942 4.614328 4.641646 4.738469 4.970694 SiO2 49.78043 49.76379 50.21269 50.50721 50.17589 K2O 0.284983 0.275565 0.264774 0.242505 0.216255 CaO 12.05108 12.2415 12.3573 12.59438 12.50985 TiO2 0.055389 0.101735 0.123971 0.228927 0.282418 MnO 0.098144 0.10023 0.110557 0.086606 0.113692 FeO 15.5223 14.41892 14.06858 12.92956 11.94571
F 0.01531 0.064931 0.084333 0.038358 0.031056 Cl 0.305636 0.259389 0.197782 0.162011 0.155887
Cr2O3 0.010055 0.007705 0.010262 0.006072 0.007299 Total 96.78679 96.80303 97.38049 97.6279 97.05824
Si (T) 7.31 7.28 7.28 7.27 7.22 Al (T) 0.69 0.72 0.72 0.73 0.78
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.09 0.07 0.07 0.08 0.07 Fe3 (VI) 0.62 0.59 0.60 0.51 0.60 Fe2 (VI) 1.29 1.17 1.11 1.04 0.84 Mg (VI) 2.98 3.13 3.18 3.32 3.44
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.01 0.01 0.01 0.02 0.03 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.89 1.92 1.92 1.94 1.93 Na (VIII) 0.11 0.08 0.08 0.06 0.07
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.01 0.05 0.04 0.08 0.06 K (A) 0.05 0.05 0.05 0.04 0.04
VAC (A) 0.93 0.90 0.91 0.87 0.90 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.92 1.91 1.91 1.94 1.95 F (X) 0.01 0.03 0.04 0.02 0.01 Cl (X) 0.08 0.06 0.05 0.04 0.04 Total 2.00 2.00 2.00 2.00 2.00
Table 8 continued: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 breccia Distance (µ) 7.5 8 8.5 9 9.5
Na2O 0.476212 0.408232 0.328948 0.345429 0.239461 MgO 15.96565 16.20637 16.45341 16.25948 16.53497
Al2O3 4.904079 4.989052 5.04174 5.034905 5.141586 SiO2 50.29659 50.38572 50.86842 50.59635 51.19116 K2O 0.2253 0.217969 0.182194 0.180717 0.165773 CaO 12.65487 12.60811 12.76736 12.65772 12.59689 TiO2 0.336549 0.361009 0.358059 0.361219 0.364555 MnO 0.103709 0.100102 0.110719 0.084074 0.086407 FeO 11.61219 11.511 11.38942 11.32708 11.2137
F 0.083075 0.067554 0.073048 0.094763 0.081943 Cl 0.147551 0.144763 0.148952 0.149543 0.151686
Cr2O3 0.008833 0.010285 0.010615 0.00904 0.012669 Total 96.96839 97.15401 97.87651 97.286 97.92731
Si (T) 7.26 7.24 7.24 7.25 7.25 Al (T) 0.74 0.76 0.76 0.75 0.74
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.10 0.08 0.09 0.10 0.11 Fe3 (VI) 0.46 0.55 0.56 0.52 0.61 Fe2 (VI) 0.94 0.83 0.80 0.83 0.72 Mg (VI) 3.44 3.47 3.49 3.47 3.49
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.04 0.04 0.04 0.04 0.04 Sc (VI) 0.00 0.00 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.96 1.94 1.95 1.94 1.91 Na (VIII) 0.04 0.06 0.05 0.06 0.07
Total 2.00 2.00 2.00 2.00 1.98
Na (A) 0.09 0.05 0.04 0.04 0.00 K (A) 0.04 0.04 0.03 0.03 0.03
VAC (A) 0.87 0.91 0.93 0.92 0.97 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.93 1.93 1.93 1.92 1.93 F (X) 0.04 0.03 0.03 0.04 0.04 Cl (X) 0.04 0.04 0.04 0.04 0.04 Total 2.00 2.00 2.00 2.00 2.00
Table 8 continued: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 breccia Distance (µ) 10 10.5 11
Na2O 0.252799 0.527579 0.451821
MgO 16.53743 16.31207 15.93952
Al2O3 5.120896 5.329885 5.279683
SiO2 51.45661 50.14428 49.8477
K2O 0.150395 0.219891 0.212689
CaO 12.57421 12.54697 12.49679
TiO2 0.365929 0.362766 0.356446
MnO 0.096492 0.11515 0.084571
FeO 11.27621 11.27192 11.29127
F 0.091529 0.076616 0.104753
Cl 0.163998 0.166344 0.165962
Cr2O3 0.007938 0.010275 0.010297
Total 98.25729 97.25082 96.40536
Si (T) 7.27 7.19 7.22
Al (T) 0.73 0.81 0.78
Total T 8.00 8.00 8.00
Al (VI) 0.12 0.09 0.12
Fe3 (VI) 0.61 0.57 0.51
Fe2 (VI) 0.72 0.78 0.86
Mg (VI) 3.48 3.49 3.44
Mn3 (VI) 0.00 0.00 0.00
Mn2 (VI) 0.01 0.01 0.01
Ti (VI) 0.04 0.04 0.04
Sc (VI) 0.00 0.00 0.00
Total (VI) 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00
Mn2 (VIII) 0.00 0.00 0.00
Mg (VIII) 0.00 0.00 0.00
Ca (VIII) 1.90 1.93 1.94
Na (VIII) 0.07 0.07 0.06
Total 1.97 2.00 2.00
Na (A) 0.00 0.07 0.07
K (A) 0.03 0.04 0.04
VAC (A) 0.97 0.88 0.89
Total 1.00 1.00 1.00
OH (X) 1.92 1.92 1.91
F (X) 0.04 0.03 0.05
Cl (X) 0.04 0.04 0.04
Total 2.00 2.00 2.00
The crystal chemistry values are from normalization routine 13eCNK. Values for BaO, S03, P2O5, V2O3, Sc2O3, NiO, CoO, ZnO, SrO, Ga2O3, SnO, and CrO were analyzed but the normalized values of
V, Cr, Ga, Co, Ni, Cu, Zn, Zr, S, P, Sn, Sr, Ba, And Y were below 0.01 and not reported in this table.
Table 9: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 fluidized vein Distance (µ) 0 0.49 0.98 1.47 1.96
Na2O 0.616228 0.643948 0.499511 0.557221 0.50212 MgO 14.18896 14.7763 14.65565 14.74578 14.9323
Al2O3 4.608243 4.450142 4.116554 4.240263 4.145957 SiO2 49.25074 49.92078 50.67001 50.51616 50.80428 K2O 0.392315 0.331757 0.295848 0.290564 0.299951 CaO 12.12522 12.15174 12.27855 12.22928 12.19658 TiO2 0.176978 0.157096 0.15064 0.167698 0.168456 MnO 0.118593 0.103859 0.12098 0.133673 0.130627 FeO 13.89458 13.71642 13.78099 13.68583 13.91527
F 0.090465 0.056923 0.030788 0.072783 0.098604 Cl 0.600342 0.574878 0.55484 0.531275 0.522328
Cr2O3 0.012671 0.011122 0.008787 0.008495 0.010705 Total 96.31524 97.17488 97.44309 97.47692 97.99744
Si (T) 7.29 7.28 7.37 7.35 7.34 Al (T) 0.71 0.71 0.62 0.65 0.66
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.09 0.05 0.08 0.07 0.04 Fe3 (VI) 0.46 0.55 0.45 0.48 0.58 Fe2 (VI) 1.26 1.13 1.23 1.18 1.10 Mg (VI) 3.13 3.21 3.18 3.20 3.21
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.02 0.02
Ti (VI) 0.02 0.02 0.02 0.02 0.02 Sc (VI) 0.02 0.02 0.02 0.02 0.02
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.92 1.90 1.91 1.91 1.89 Na (VIII) 0.08 0.10 0.09 0.09 0.11
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.10 0.08 0.06 0.06 0.03 K (A) 0.07 0.06 0.05 0.05 0.06
VAC (A) 0.83 0.85 0.89 0.88 0.92 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.81 1.83 1.85 1.84 1.83 F (X) 0.04 0.03 0.01 0.03 0.05 Cl (X) 0.15 0.14 0.14 0.13 0.13 Total 2.00 2.00 2.00 2.00 2.00
Table 9 cont: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 fluidized vein Distance (µ) 2.45 2.94 3.43 3.92 4.41
Na2O 0.459417 0.447791 0.415261 0.48283 0.410283 MgO 15.43684 16.05642 16.72971 17.19838 17.18
Al2O3 3.880028 3.599146 3.727839 3.802659 3.638127 SiO2 50.94036 51.24562 51.95573 52.21526 52.55521 K2O 0.216081 0.17928 0.140998 0.127111 0.132818 CaO 12.4009 12.39946 12.53332 12.50612 12.53915 TiO2 0.167395 0.192898 0.284165 0.309446 0.330705 MnO 0.107481 0.102518 0.106353 0.089507 0.110957 FeO 12.81604 11.75689 10.47326 9.938597 9.859152
F 0.057643 0.057194 0.044403 0.068381 0.040736 Cl 0.471967 0.450115 0.320313 0.200497 0.174416
Cr2O3 0.010845 0.012147 0.006916 0.009196 0.009414 Total 97.20545 96.74438 96.94944 97.14528 97.14034
Si (T) 7.39 7.43 7.46 7.45 7.49 Al (T) 0.61 0.57 0.54 0.55 0.51
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.05 0.04 0.10 0.09 0.11 Fe3 (VI) 0.47 0.44 0.35 0.38 0.34 Fe2 (VI) 1.08 0.98 0.91 0.80 0.84 Mg (VI) 3.34 3.47 3.58 3.66 3.65
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.02 0.02 0.03 0.03 0.04 Sc (VI) 0.01 0.01 0.01 0.01 0.01
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.93 1.93 1.93 1.91 1.92 Na (VIII) 0.07 0.07 0.07 0.09 0.08
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.06 0.05 0.04 0.05 0.03 K (A) 0.04 0.03 0.03 0.02 0.02
VAC (A) 0.90 0.91 0.93 0.93 0.95 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.86 1.86 1.90 1.92 1.94 F (X) 0.03 0.03 0.02 0.03 0.02 Cl (X) 0.12 0.11 0.08 0.05 0.04 Total 2.00 2.00 2.00 2.00 2.00
Table 9 cont: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 fluidized vein Distance (µ) 4.9 5.39 5.88 6.36 6.85
Na2O 0.372639 0.387697 0.405831 0.365029 0.370687 MgO 17.24808 17.42558 17.37906 17.26682 17.17839
Al2O3 3.514935 3.58926 3.495939 3.506949 3.455597 SiO2 52.33304 52.66204 52.64145 52.5106 52.57007 K2O 0.13912 0.135386 0.134132 0.1375 0.135239 CaO 12.63288 12.52495 12.53114 12.64888 12.56851 TiO2 0.325436 0.329967 0.32922 0.315063 0.297157 MnO 0.102318 0.090995 0.076503 0.099747 0.110512 FeO 9.903116 10.02925 10.20088 9.968587 9.951324
F 0.094852 0.134459 0.043814 0.091815 0.10036 Cl 0.129631 0.108869 0.103667 0.097338 0.098636
Cr2O3 0.009273 0.006635 0.009026 0.008896 0.009968 Total 96.97705 97.58324 97.51756 97.17515 97.01857
Si (T) 7.48 7.47 7.47 7.49 7.51 Al (T) 0.52 0.53 0.53 0.51 0.49
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.08 0.07 0.05 0.08 0.09 Fe3 (VI) 0.35 0.44 0.44 0.35 0.34 Fe2 (VI) 0.83 0.75 0.77 0.84 0.85 Mg (VI) 3.68 3.68 3.68 3.67 3.66
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.04 0.04 0.04 0.03 0.03 Sc (VI) 0.01 0.01 0.01 0.01 0.01
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.94 1.90 1.90 1.93 1.92 Na (VIII) 0.06 0.10 0.10 0.07 0.08
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.04 0.01 0.02 0.03 0.03 K (A) 0.03 0.02 0.02 0.03 0.02
VAC (A) 0.93 0.96 0.96 0.94 0.95 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.93 1.91 1.96 1.94 1.93 F (X) 0.04 0.06 0.02 0.04 0.05 Cl (X) 0.03 0.03 0.02 0.02 0.02 Total 2.00 2.00 2.00 2.00 2.00
Table 9 cont: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 fluidized vein Distance (µ) 7.34 7.83 8.32 8.81 9.3
Na2O 0.349625 0.39943 0.345135 0.306143 0.357678 MgO 17.33293 17.1598 17.4588 17.09636 17.20603
Al2O3 3.454551 3.497281 3.505378 3.433743 3.23456 SiO2 52.50746 52.56879 52.68046 52.79105 52.61652 K2O 0.125463 0.125406 0.149655 0.143597 0.129358 CaO 12.60102 12.54147 12.54582 12.54355 12.54733 TiO2 0.326719 0.323484 0.298521 0.299066 0.330176 MnO 0.094123 0.083414 0.110288 0.063432 0.119729 FeO 9.997779 10.16026 10.06195 9.862707 9.863163
F 0.108787 0.048736 0.086219 0.098746 0.099773 Cl 0.096674 0.101601 0.102802 0.097193 0.102798
Cr2O3 0.009552 0.008508 0.009371 0.01032 0.008862 Total 97.14782 97.16942 97.50852 96.89342 96.78101
Si (T) 7.48 7.49 7.47 7.54 7.53 Al (T) 0.52 0.51 0.53 0.46 0.47
Total T 8.00 8.00 8.00 8.00 8.00
Al (VI) 0.06 0.08 0.06 0.12 0.08 Fe3 (VI) 0.40 0.37 0.46 0.30 0.32 Fe2 (VI) 0.79 0.84 0.74 0.88 0.86 Mg (VI) 3.68 3.65 3.69 3.64 3.67
Mn3 (VI) 0.00 0.00 0.00 0.00 0.00 Mn2 (VI) 0.01 0.01 0.01 0.01 0.01
Ti (VI) 0.04 0.03 0.03 0.03 0.04 Sc (VI) 0.01 0.01 0.01 0.01 0.01
Total (VI) 5.00 5.00 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mn2 (VIII) 0.00 0.00 0.00 0.00 0.00 Mg (VIII) 0.00 0.00 0.00 0.00 0.00 Ca (VIII) 1.92 1.92 1.91 1.92 1.92 Na (VIII) 0.08 0.08 0.09 0.08 0.08
Total 2.00 2.00 2.00 2.00 2.00
Na (A) 0.02 0.03 0.00 0.01 0.02 K (A) 0.02 0.02 0.03 0.03 0.02
VAC (A) 0.96 0.95 0.97 0.97 0.95 Total 1.00 1.00 1.00 1.00 1.00
OH (X) 1.93 1.95 1.94 1.93 1.93 F (X) 0.05 0.02 0.04 0.04 0.05 Cl (X) 0.02 0.02 0.02 0.02 0.02 Total 2.00 2.00 2.00 2.00 2.00
Table 9 cont: Microprobe oxides and normalized crystal chemistry for DDH628-593.2 fluidized vein Distance (µ) 9.79 10.28 10.77
Na2O 0.34311 0.311051 0.369184
MgO 17.25094 17.27954 17.17951
Al2O3 3.435767 3.346753 3.295756
SiO2 52.22982 52.52411 52.48994
K2O 0.128831 0.130831 0.123139
CaO 12.56801 12.58694 12.51267
TiO2 0.317902 0.303304 0.301362
MnO 0.076936 0.104656 0.080555
FeO 10.03776 9.961198 9.859683
F 0.041305 0.100408 0.053834
Cl 0.104773 0.100682 0.097243
Cr2O3 0.009242 0.009254 0.00908
Total 96.70744 96.93014 96.5383
Si (T) 7.48 7.50 7.53
Al (T) 0.52 0.50 0.47
Total T 8.00 8.00 8.00
Al (VI) 0.06 0.07 0.09
Fe3 (VI) 0.40 0.38 0.33
Fe2 (VI) 0.80 0.81 0.85
Mg (VI) 3.68 3.68 3.67
Mn3 (VI) 0.00 0.00 0.00
Mn2 (VI) 0.01 0.01 0.01
Ti (VI) 0.03 0.03 0.03
Sc (VI) 0.01 0.01 0.01
Total (VI) 5.00 5.00 5.00
Fe2 (VIII) 0.00 0.00 0.00
Mn2 (VIII) 0.00 0.00 0.00
Mg (VIII) 0.00 0.00 0.00
Ca (VIII) 1.93 1.93 1.92
Na (VIII) 0.07 0.07 0.08
Total 2.00 2.00 2.00
Na (A) 0.02 0.01 0.03
K (A) 0.02 0.02 0.02
VAC (A) 0.95 0.96 0.95
Total 1.00 1.00 1.00
OH (X) 1.96 1.93 1.95
F (X) 0.02 0.05 0.02
Cl (X) 0.03 0.02 0.02
Total 2.00 2.00 2.00
The crystal chemistry values are from normalization routine 13eCNK. Values for BaO, S03, P2O5, V2O3, Sc2O3, NiO, CoO, ZnO, SrO, Ga2O3, SnO, and CrO were analyzed but the normalized values of
V, Cr, Ga, Co, Ni, Cu, Zn, Zr, S, P, Sn, Sr, Ba, And Y were below 0.01 and not reported in this table.
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