Bedrock Geology of the Eastern N emibnL akAr (Parts of NTS 73P03, 06, and 07) at1:2 ... · 2018....
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Syn- to Post-tectonic Intrusive Rocks Granite pegmatite, granite: coarse grained to pegmatitic; homogenous; massive to weakly foliated; biotite ± garnet; CI 1 =5; very low MS 2 : <0.1. Syenogranite, leucogranite: light pink to pink; fine to medium grained; locally gradational into pegmatite; homogeneous; generally massive to weakly foliated; postdates unit Mdi; quartz, K- feldspar, plagioclase, biotite (5%); CI= 5; very low MS: 0.05-0.1. Monzodiorite (monzonite, quartz monzonite): light grey, salt and pepper; medium to coarse grained; equigranular; homogeneous; massive to weakly foliated; commonly with abundant xenoliths of units Ps and Psp; locally with dioritic to gabbroic autoliths; cut by unit Gs and by intermediate and mafic dykes; post-dates F2; plagioclase (sub- to euhedral), hornblende (10- 20%), K-feldspar (10-15%), biotite (5-10%), quartz (0-10%); CI=15-25; low MS: 0.15-0.35. Nemeiben Lake Ultramafic Intrusion (units within intrusion were compiled from MacFarlane and Mossman (1982) 3 Nemeiben Lake Pyroxenite: pale green, dusky green to brown; medium to coarse grained; diopside (60-90%) with exsolved orthopyroxene, tremolite (5-20%), olivine (0-10%), serpentine, magnetite, pyrite, pyrrhotite, chalcopyrite; CI=95-100; very high MS: 3-30. Dunite Websterite Wehrlite Intrusive Rocks Predating Main Deformation Event Leucocratic orthogneiss: white, light grey to rusty brown; fine to medium grained; heterogeneous, sheared and altered partly silicified-sericitized granitoids; strongly foliated to mylonitic; quartz, plagioclase, K-feldspar, biotite (0-5%), muscovite (0-5%) ± magnetite ± garnet ± pyrite; CI=0-5; variable MS: 0.05-50. Granite (to granodiorite): light pink to pinkish grey; medium to coarse grained; generally homogeneous with local gradational changes into granitic pegmatite; massive to moderately foliated, becoming progressively mylonitic towards the southeast; post-dates units Ps and Psp; quartz (30-35%), K-feldspar (30%), plagioclase (25%), biotite (5-10%) ± magnetite; CI=5-10; variable MS: 0.05-17. Biotite granodiorite: light pinkish grey to grey; variable from medium grained, well foliated and locally gneissic to coarse grained, homogeneous and massive; locally cut granitic pegmatite sheets and dykes; plagioclase, quartz, K-feldspar, biotite (5-15%), magnetite (0-2%) ± hornblende; CI=5-15; variable MS: 0.2-50. Garnetiferous granodiorite gneiss: grey to pinkish grey; medium to coarse grained; homogeneous; gneissic; moderately to strongly foliated, locally mylonitic; plagioclase, quartz (25- 30%), biotite (5-10%), garnet (0-10%), magnetite (1-3%); CI=10-15; variable MS: 0.1-20. Biotite tonalite (-granodiorite): white, light grey to light pinkish grey; medium to coarse grained; homogeneous; massive to moderately foliated, locally gneissic; cut by late granite pegmatite dykes; contains screens and xenoliths of units Mv and Am; plagioclase, quartz (25-35%), biotite (5-10%) ± hornblende; CI=5-10; very low MS: 0.05-0.5, erratic high values; <1% potassium based on spectrometer. Diorite, microdiorite: salt and pepper; fine to medium grained; homogenous, equigranular; moderately to strongly foliated; local amphibolite inclusions and transposed tonalitic sheets; plagioclase (50-70%), hornblende (15-20%), biotite (5-10%), quartz (0-5%) ± titanite ± garnet; CI=25-35; low MS: 0.4-0.6. Gabbro: mottled black and white, greenish black; generally medium to coarse grained; moderately to strongly foliated; heterogeneous with abundant cross-cutting tonalitic sheets; plagioclase, hornblende (35-60%) ± clinopyroxene; CI=35-70; generally low to moderate MS: 0.4- 0.7, erratic high values. Pyroxenite, melagabbro: black to pale green; medium to coarse grained; cut by tonalitic sheets (unit T) and granitic pegmatite (unit P); CI=75-95; generally low to moderate MS: 0.4-0.7, erratic high values. Supracrustal Rocks Feldspathic psammite (psammopelite, feldspathic quartzite): grey to brownish grey; fine grained; equigranular; layered on cm- to dm-scale; interbedded with migmatitic psammopelite (unit Psp); well foliated and locally gneissic; contains up to 20% dismembered/boudinaged quartz veins; quartz (25-50%), plagioclase (20-30%), K-feldspar (10-30%), biotite (5-10%), muscovite (1- 10%) ± graphite ± garnet; CI=5-10; low MS: 0.2-0.3; relatively high potassium content based on spectrometer. Migmatitic feldspathic psammopelite (-psammite): grey to brownish grey; fine to medium grained; well foliated, locally gneissic; compositionally layered on cm- to dm-scale, psammopelitic layers predominating over minor psammitic layers; generally migmatitic with 10-20% transposed granitic leucosome; late cross-cutting granite pegmatite dykes; quartz, plagioclase, K-feldspar, biotite (10-15%), muscovite (0-10%) ± graphite ± sillimanite; CI=10-25; generally low MS: 0.15- 0.4; high potassium based on spectrometer. Felsic volcanic rock: grey; fine to medium grained; layered; strongly foliated to mylonitic; interlayered succession (m-scale) of felsic to intermediate volcaniclastic rocks; cut by rhyolitic sills and later mafic and aplitic dykes; contains local cm-thick biotite-rich veins with bleached feldspathic margins; plagioclase, quartz, K-feldspar, biotite (5-10%), garnet (0-5%); CI=10; low MS: 0.3. Intermediate volcanic and volcaniclastic rock: light grey, salt and pepper; fine grained; equigranular, mostly non-descript, in part compositionally layered on cm- to dm-scale, weakly foliated to sheared, locally lineated; in part interlayered with mafic rocks; locally intruded by granitic dykes; plagioclase (50-70%), hornblende (15-35%), epidote (0-15%); CI=15-35; low to moderate MS: 0.4-0.8. ‘Trachytic’-textured porphyritic mafic volcanic rock: dark grey to greenish black; fine to medium grained; weakly foliated to sheared; characterized by mm- to cm-long, randomly to flow- oriented plagioclase phenocrysts; with calc-silicate layers and locally abundant garnet porphyroblasts with variably developed plagioclase decompression haloes; intruded by locally abundant tonalitic sheets (unit T) and later granitic pegmatite (unit P); derived from volcanic flows and subvolcanic intrusions; hornblende (40-60%), plagioclase (20-40%), epidote (5-20%), quartz (5%), garnet (0-10%) ± pyroxene ± titanite ± carbonate ± sulphides; CI=40-60; moderate MS: 0.5- 0.7. Altered mafic volcanic rock: dm- to outcrop-scale zones of quartz-garnet ± amphibole (?cummingtonite) alteration zones invading mafic volcanic rocks; quartz (20-40%), hornblende (5-15%), garnet (5-15%), biotite (2-15%), magnetite (0-2%), pyrite (0-2%), chlorite (2-5%); high MS: 4-15. Layered calc-silicate rock: possibly representing highly strained quartz-epidote altered mafic volcanic rocks; transposed layering on dm-scale; with abundant diopside (40%), epidote or clinozoisite (30%), carbonate. Pillowed mafic volcanic flow: locally cut by 20-50 cm thick tonalitic sheets. Amphibolite: dark green to greenish grey; fine to medium grained; homogeneous to layered on dm-scale; massive to strongly foliated; 20-50% transposed tonalitic layers; cut by granitic pegmatite dykes that are locally folded; derived from both mafic volcanic and gabbroic protoliths; hornblende (50-60%), plagioclase (20-40%), clinopyroxene (0-15%) ± titanite ± epidote ± garnet; CI=50-60; moderate MS: 0.5-0.7. 1 Colour Index 2 Magnetic Susceptibility in 10 -3 SI units 3 MacFarlane, N.D. and Mossman, D.J. (1982): Geology of the Nemeiben Lake ultramafic complex, north- central Saskatchewan, CIM Bull., v75, no837, p83-91. Besnard Morin Lake Lake ake Lake Nemeiben Lake Egg LA RONGE LAC Lake Island Island Lake Black Black Bear Bear McIntosh Lake Wapawekka Lake Otter Lake 73P-11 73P-04 73P-02 73P-03 73P-05 73P-06 73P-07 73P-12 73P-10 73I-13 73I-15 73I-14 73O-09 73O-08 73J-16 Air Ronge 105°W 105°W 106°W 106°W 55°N 55°N Scale 1:20 000 8 39 51 30 50 35 47 60 50 50 77 48 42 44 70 70 68 80 53 68 50 50 70 75 60 75 45 74 58 60 58 85 55 62 45 37 40 32 57 12 28 39 15 35 40 30 38 59 45 29 80 37 21 85 53 26 36 85 75 70 78 78 80 68 50 72 85 50 47 60 80 60 85 85 65 65 80 75 80 85 80 78 80 78 75 85 70 85 65 78 65 63 80 70 80 71 55 75 58 50 51 85 78 89 75 80 78 85 85 78 55 85 85 80 75 80 80 85 80 40 80 78 60 70 53 60 15 53 55 40 84 68 68 50 70 60 75 62 68 65 58 68 55 72 60 55 68 58 75 69 72 65 73 85 80 67 80 80 53 63 70 58 51 60 50 43 50 53 60 50 65 45 45 67 59 53 50 42 67 60 65 62 55 55 70 45 52 48 56 55 55 57 47 78 55 85 75 55 35 77 52 65 75 60 77 50 76 79 75 65 60 39 52 52 52 47 45 62 46 72 55 67 55 69 63 68 43 47 36 52 48 48 35 49 35 53 28 46 42 30 21 12 17 37 48 49 54 61 75 50 45 50 52 85 85 79 85 82 85 88 85 80 80 78 77 75 80 55 50 40 85 82 85 85 85 76 80 85 80 85 80 80 78 78 63 66 69 60 85 85 85 85 80 80 75 78 42 80 43 85 83 82 67 62 55 52 75 53 78 52 63 78 85 85 80 85 80 85 70 85 65 51 73 75 80 63 85 70 80 80 80 85 67 77 63 75 67 85 67 70 80 77 80 80 78 80 49 43 71 47 59 77 58 45 63 48 47 50 61 75 67 61 40 47 75 80 70 70 68 77 72 65 71 60 67 68 78 73 80 73 78 73 78 75 82 68 62 80 55 56 71 65 68 55 60 85 85 67 77 60 80 75 81 80 70 80 75 80 80 70 80 80 80 80 85 80 80 60 51 67 41 39 50 43 42 48 43 40 40 45 39 45 47 47 80 45 65 58 85 41 50 47 40 48 68 55 40 60 52 48 65 37 77 48 44 39 40 37 50 42 56 56 45 46 41 35 47 49 80 24 38 31 41 34 42 60 28 51 51 41 40 35 34 51 22 40 26 29 27 38 30 31 29 85 68 66 85 80 48 72 75 25 67 58 46 60 50 30 40 85 80 70 75 44 85 70 80 85 72 65 51 63 80 80 50 80 52 75 72 45 50 59 50 72 77 55 70 85 62 80 57 55 55 35 72 47 75 72 62 80 70 85 80 70 85 85 75 42 78 78 78 80 78 59 T Mdi G Ps Am Mvt Gd Gd G Mvt Psp Mvt NPx Gd Psp Gd Gd Gs Am Mvt Gd Gd G Lgd Psp Di Mvp Mvp T Iv Px Mvt Am T Mvc Iv Am Lgd P Di Gs P T Px T Di T Gdg Psp NWl Di Mva Di Mvt Am Mvt Mdi Ga Ps Gdg Am Gs Lgd Mva T Ga G NWb Mdi Iv G Mvt G T Fv Ga Ga Di G Mvp T Ps Am Mdi Mvc Mvc Psp Mdi NWb Am Psp Mva Mdi Mdi NWb T Mvt NDn Ps Ps Gs Mdi Mdi T T T T T T Mvt Mvt T T T T T T T T T Mvt Mvt Mvt Mvt Mvt Am Am Am Am Am Am T T T T G Ps Ps Ps Ps Ps Psp Psp Psp G Gd Gd Gd G G G G G Psp Lgd Mdi Mdi T T Gd Gd Gd Am Am Am T T T Mvt Mvt Lgd G G G Lgd Gd Psp Mvc Mvc Mvc G G Gdg T Mvt Mvt Mvt Mvt Mvt Mvt Mvt Mvt Di Di T T T T po py py py py po mal py, po po, cpy py, cpy py, po, cpy T T T T T P P P P P P P P P P P P Di Di Di Di Gd Di RM1001-052 RM1001-051 RM1001-020 RM1001-050 RM1001-016 RM1001-053 RM1001-043 RM1001-039 RM1001-036 RM1001-035 RM1001-027 RM1001-026 KM1001-002 KM1001-001 RM1001-5005 RM1001-5004 Bell Bay Wadin Bay Synform Lake Midway Lake Midway Creek Cycloid Lake Burgess Lakes Nemeiben Lake Sunset Island McBeth Island Thorson Island Nemeiben Creek Whitmore Island Munroe Peninsula Sucker River 156C Angus Lake Elizabeth Lake Lac La Ronge 0746 0749 0733 0744 0736 472000 472000 473000 473000 474000 474000 475000 475000 476000 476000 477000 477000 478000 478000 479000 479000 480000 480000 481000 481000 482000 482000 483000 483000 484000 484000 485000 485000 486000 486000 487000 487000 488000 488000 489000 489000 490000 490000 6121000 6121000 6122000 6122000 6123000 6123000 6124000 6124000 6125000 6125000 6126000 6126000 6127000 6128000 6128000 6129000 6129000 6130000 6130000 6131000 6131000 6132000 6132000 6133000 6133000 6134000 6134000 6135000 6135000 6136000 6136000 6137000 6137000 6138000 6138000 55°20'N 55°20'N 55°15'N 55°15'N 105°10'W 105°10'W 105°20'W 105°20'W 0 0.5 1 1.5 2 0.25 Kilometres 0 0.25 0.5 0.75 1 Miles This map Although the Ministry of Energy and Resources has exercised all reasonable care in the compilation, interpretation, and production of this item, it is not possible to ensure total accuracy, and all persons that rely on the information contained herein do so at their own risk. The Ministry of Energy and Resources and the Government of Saskatchewan do not accept liability for any errors, omissions or inaccuracies that may be included in or derived from, this item. Glacial drift Gradational Contacts Catalogue Number 2010-4.2-(1) The area was mapped by Ralf Maxeiner and Kate MacLachlan , in the summer of 20 10, with the assistance of Anna Torgunrud, Kyle Blazek, and Cameron MacKay. This map was printed from the geologist’s digital file. Geological data were processed using Microsoft Access, and ArcView 9.3 software. Base maps were compiled from CanVec 1:50 000 scale digital cartographic maps produced by Natural Resources Canada . Grid coordinates are NAD83 CSRS98 UTM zone 13. The map was processed overall using ArcView 9.3 software. The map is issued in a package with the Summary of Investigations 20 10 Volume 2, Saskatchewan Geological Survey, and is available separately from http://www.er.gov.sk.ca/geo -reports . This map accompanies the following publication: Maxeiner, R.O. and MacLachlan, K. (2010): Preliminary bedrock geology of the eastern Nemeiben Lake area in the vicinity of the Elizabeth Lake Cu deposit and the Dunlop Cu -Ni deposit, western Glennie Domain (Parts of NTS 73P03, 06, and 07); in Summary of Investigations 20 10 Volume 2, Saskatchewan Geological Survey, Sask . Ministry of Energy and Resources, Misc. Rep. 2010-4.2. This map may be referenced as: Maxeiner, R.O. and MacLachlan, K. (2010): Geology of the eastern Nemeiben Lake a rea (Parts of NTS 73P03, 06, and 07); 1:20 000 scale prelim. map; with Summary of Investigations 20 10, Volume 2, Saskatchewan Geological Survey, Sask. Ministry of Energy and Resources, Misc. Rep. 20 10-4.2. Location Map Legend P Gs Mdi NPx NDn NWb NWl Lgd G Gd Gdg T Di Ga Mvc Am Mvp Mva Mvt Fv Psp Iv Ps Px Geological contact: defined to approximate Airphoto lineament Trace of axial planes: F1, F2, F3, F4 Mineral occurrence, trench cpy - chalcopyrite, po - pyrrhotite, py – pyrite, mal – malachite Mineral occurrence with SMDI number (copper, nickel, molybdenum) Geochemistry sample (analyses listed in table) Outcrop examined Glacial striae (macro- and microstriations, chattermarks): first generation; second generation Sedimentary layering, igneous layering: younging direction unknown (inclined, vertical), younging direction known Main foliation (commonly composite S1/S2 fabric): inclined, vertical Second generation foliation: inclined, vertical Third generation foliation: inclined, vertical Fold axial plane (inclined): first generation (isoclinal), second generation (isoclinal to tight; with local axial planar biotite, retrogressed sillimanite, leucosome layers), third generation (tight east dipping folds; locally with weak axial planar schistosity), fourth generation (metre-scale, upright, gentle folds) Fold axial plane (vertical): first generation (isoclinal), third generation (tight east dipping folds; locally with weak axial planar schistosity) Lineation (unknown age): unknown type, mineral lineation, stretching lineation Fold axis (symmetry unknown): first generation, second generation Fold axis (symmetrical): second generation, third generation Fold axis (s-fold): second generation, third generation Fold axis (z-fold): second generation Small ductile shear (inclined): sense unknown, dextral Small ductile shear (vertical): sense unknown Dyke (inclined, vertical): pegmatite (P), tonalite (T), microdiorite and diorite (Di), granodiorite (Gd) High strain Abundant granite sheets Abundant tonalite sheets Building Muskeg Reef or small island Contour intervals (10m) Road Analyte Symbol Pd Pt Au Au Ag Cu Cd Mo Pb Ni Zn S Al Ba Be Ca Co Cr Eu Fe Hf K Mg Mn Na P Rb Sb Sc Sr Ta Ti Th U V Y La Ce Nd Sm Yb Lu Mass Unit Symbol ppb ppb ppb ppb ppm ppm ppm ppm ppm ppm ppm % % ppm ppm % ppm ppm ppm % ppm % % ppm % % ppm ppm ppm ppm ppm % ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm g Sample Station Detection Limit 1 1 2 1 0.3 1 0.3 1 3 1 1 0.01 0.01 50 1 0.01 1 2 0.2 0.01 1 0.01 0.01 1 0.01 0.001 15 0.1 0.1 1 0.5 0.01 0.2 0.5 2 1 0.5 3 5 0.1 0.2 0.05 Number Number Analysis Method A A A B C D D D D C C D D B D D B B B B B D D D B D B B B D B D B B D D B B B B B B B KM1001-002 KM10-03-ST03 < 2 < 0.3 14 < 0.3 < 1 16 20 69 < 0.01 6.64 950 2 1.29 9 70 1.3 3.24 7 1.67 1.09 441 2.13 0.064 116 0.4 10.5 194 < 0.5 0.34 14.4 4.6 66 17 43.9 84 27 5.6 3.3 0.6 27.5 KM1001-001 KM10-02-ST05 < 2 < 0.3 22 0.4 < 1 5 4 32 0.11 0.1 60 < 1 0.2 < 1 41 < 0.2 5.97 < 1 0.03 0.04 90 0.02 0.006 20 0.6 0.2 2 < 0.5 < 0.01 < 0.2 < 0.5 37 < 1 0.6 < 3 < 5 < 0.1 < 0.2 < 0.05 28.5 RM1001-016 RM10-09-ST14 12 < 0.3 129 0.6 < 1 < 3 69 142 0.42 5.97 < 50 11 10.7 31 114 0.6 9.19 < 1 0.37 3.37 2630 1.23 0.042 < 15 0.4 34 93 1 0.4 < 0.2 < 0.5 238 26 4.2 8 7 2.1 4.1 0.4 35.2 RM1001-020 RM10-11-ST04 < 2 < 0.3 163 0.7 < 1 < 3 98 104 0.96 6.78 180 < 1 7.25 53 150 0.9 7.96 2 0.68 3.88 1370 1.49 0.031 < 15 0.4 45.4 130 < 0.5 0.62 < 0.2 1.6 349 22 3.4 11 < 5 1.9 3 0.35 30.2 RM1001-026 RM10-14-ST13 < 2 < 0.3 34 < 0.3 2 < 3 2 28 1.43 6.36 < 50 1 0.6 5 16 2 3.86 6 0.32 0.97 434 3.93 0.049 32 0.8 12 77 < 0.5 0.33 2.8 1.1 9 11 45.2 92 36 8.4 4.8 0.78 29.3 RM1001-027 RM10-14-ST14 < 2 0.4 22 < 0.3 < 1 < 3 4 11 0.72 7.42 480 2 1.39 10 14 1.8 3.74 6 0.69 0.74 417 3.95 0.054 < 15 0.6 10.9 272 1.8 0.34 2.6 1.6 31 21 25.6 64 23 6.2 4.5 0.6 25.9 RM1001-035 RM10-18-ST17 < 2 0.3 5 < 0.3 2 < 3 4 15 0.37 6.84 1020 2 0.97 8 15 1.1 2.24 6 1.01 0.87 252 4.08 0.03 < 15 0.2 6.8 158 < 0.5 0.25 3.2 2.9 27 10 22 45 17 4 3.7 0.63 28.8 RM1001-036 RM10-18-ST22 < 2 < 0.3 4 < 0.3 13 < 3 3 8 0.95 6.26 780 2 0.77 10 13 1.6 1.67 6 0.73 0.59 137 4.24 0.022 < 15 < 0.1 8.1 102 < 0.5 0.18 3.7 < 0.5 15 14 25.3 58 28 6.1 4 0.67 28.2 RM1001-039 RM10-20-ST07 < 2 < 0.3 274 0.6 < 1 < 3 107 78 0.15 6.29 < 50 < 1 7.16 83 190 0.7 6.79 2 0.34 4.39 600 2.43 0.023 < 15 0.2 34.4 222 < 0.5 0.3 < 0.2 1.2 225 7 1.8 6 < 5 1.7 0.8 0.09 27.8 RM1001-043 RM10-24-ST01 60 5 13 18 0.7 2330 0.5 < 1 11 2620 40 1.52 6.75 < 50 < 1 7.11 152 228 0.3 7.38 1 0.4 6.06 641 1.28 0.004 32 < 0.1 38.8 294 < 0.5 0.32 0.4 1 176 8 1.9 7 < 5 1 1.3 0.09 31.6 Analyte Symbol SiO2 Al2O3 Fe2O3 MnO MgO CaO Na2O K2O TiO2 P2O5 LOI Total Sc V Cr Co Ni Cu Zn Ga Ge Rb Sr Y Zr Nb Ag Ba La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Pb Th U Unit Symbol % % % % % % % % % % % % ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm Sample Station Detection Limit 0.01 0.01 0.01 0.001 0.01 0.01 0.01 0.01 0.001 0.01 0.01 1 5 20 1 20 10 30 1 0.5 1 2 0.5 1 0.2 0.5 3 0.05 0.05 0.01 0.05 0.01 0.005 0.01 0.01 0.01 0.01 0.01 0.005 0.01 0.002 0.1 0.01 0.5 5 0.05 0.01 Number Number Analysis Method E E E E E E E E E E E E E E F F F F F F F F E F F F F E F F F F F F F F F F F F F F F F F F F F RM1001-050 RM10-11-ST03 49.43 14.28 12.55 0.18 8.11 10.85 2.04 0.8 0.861 0.06 1.18 100.3 44 316 190 47 100 150 90 16 2 10 86 18.5 50 2 < 0.5 74 3.27 7.78 1.18 5.96 2.1 0.794 2.46 0.49 3.43 0.73 2.07 0.308 2.19 0.387 1.4 0.14 0.7 < 5 0.22 0.13 RM1001-051 RM10-11-ST14 49.42 13.98 12.19 0.202 7.86 12.74 1.6 0.34 0.772 0.06 1.01 100.2 47 295 180 48 90 50 90 15 2 3 99 16.1 41 1.4 < 0.5 62 2.16 5.31 0.9 4.97 1.74 0.666 2.18 0.44 3.06 0.65 1.9 0.284 1.96 0.349 1.2 0.1 0.5 < 5 0.13 0.08 RM1001-052 RM10-11-ST15 48.24 14.53 11.63 0.176 8.4 13.45 1.62 0.26 0.812 0.11 1.32 100.6 47 292 330 53 130 120 100 16 1.9 3 149 17.2 38 1 < 0.5 58 2.84 7.39 1.2 6.29 2.1 0.783 2.52 0.48 3.22 0.69 1.98 0.298 2.12 0.373 1.2 0.13 0.6 < 5 0.18 0.15 RM1001-053 RM10-29-ST02 51.08 14.93 10.9 0.181 6.23 11.38 2.4 0.24 0.95 0.07 1.24 99.6 47 340 170 47 100 100 90 16 1.8 2 93 21 47 1.3 < 0.5 58 2.53 6.89 1.12 5.86 2.13 0.818 2.79 0.56 3.88 0.84 2.45 0.379 2.65 0.459 1.5 0.13 0.7 < 5 0.15 0.16 RM1001-5004 RM10-12-ST18 75.05 15.63 0.8 0.01 0.17 2.33 5.83 0.51 0.065 0.02 0.34 100.8 < 1 < 5 < 20 < 1 < 20 < 10 < 30 18 0.6 11 1059 < 0.5 52 0.4 < 0.5 376 1.08 1.94 0.21 0.67 0.11 0.227 0.06 0.01 0.07 0.02 0.07 0.013 0.09 0.014 1.6 0.04 1.6 5 < 0.05 0.09 RM1001-5005 RM10-16-ST09 61.09 16.99 5.29 0.077 3.4 4.98 4.28 1.66 0.597 0.25 1.07 99.69 12 88 120 16 40 20 90 21 1.2 33 883 15.3 170 5.7 < 0.5 740 25.2 51.5 6.84 28 5.63 1.49 4.15 0.59 3.18 0.62 1.68 0.236 1.55 0.268 4 0.3 0.9 8 3.25 1.34 Note: Analysis methods are A - FA-MS; B - INAA; C - MULT B / TD-ICP; D - TD-ICP; E - FUS-ICP; F - FUS-MS Digital data and UTM coordinates available from [email protected] Analyses performed by Activation Laboratories, Ancaster, ONT Table of Geochemical Analyses Bedrock Geology of the Eastern Nemeiben Lake Area (Parts of NTS 73P03, 06, and 07) at 1:20 000 scale Preliminary Geological Map (2010) by R.O. Maxeiner and K. MacLachlan Symbols
Transcript of Bedrock Geology of the Eastern N emibnL akAr (Parts of NTS 73P03, 06, and 07) at1:2 ... · 2018....
Syn- to Post-tectonic Intrusive Rocks P Granite pegmatite, granite: coarse grained to pegmatitic; homogenous; massive to weakly
foliated; biotite ± garnet; CI1=5; very low MS2: <0.1. Gs Syenogranite, leucogranite: light pink to pink; fine to medium grained; locally gradational into
pegmatite; homogeneous; generally massive to weakly foliated; postdates unit Mdi; quartz, K-feldspar, plagioclase, biotite (5%); CI= 5; very low MS: 0.05-0.1.
Mdi Monzodiorite (monzonite, quartz monzonite): light grey, salt and pepper; medium to coarse
grained; equigranular; homogeneous; massive to weakly foliated; commonly with abundant xenoliths of units Ps and Psp; locally with dioritic to gabbroic autoliths; cut by unit Gs and by intermediate and mafic dykes; post-dates F2; plagioclase (sub- to euhedral), hornblende (10-20%), K-feldspar (10-15%), biotite (5-10%), quartz (0-10%); CI=15-25; low MS: 0.15-0.35.
Nemeiben Lake Ultramafic Intrusion (units within intrusion were compiled from MacFarlane and Mossman (1982)3 NPx Nemeiben Lake Pyroxenite: pale green, dusky green to brown; medium to coarse grained;
diopside (60-90%) with exsolved orthopyroxene, tremolite (5-20%), olivine (0-10%), serpentine, magnetite, pyrite, pyrrhotite, chalcopyrite; CI=95-100; very high MS: 3-30.
NDn Dunite NWb Websterite NWl Wehrlite
Intrusive Rocks Predating Main Deformation Event Lgd Leucocratic orthogneiss: white, light grey to rusty brown; fine to medium grained;
heterogeneous, sheared and altered partly silicified-sericitized granitoids; strongly foliated to mylonitic; quartz, plagioclase, K-feldspar, biotite (0-5%), muscovite (0-5%) ± magnetite ± garnet ± pyrite; CI=0-5; variable MS: 0.05-50.
G Granite (to granodiorite): light pink to pinkish grey; medium to coarse grained; generally
homogeneous with local gradational changes into granitic pegmatite; massive to moderately foliated, becoming progressively mylonitic towards the southeast; post-dates units Ps and Psp; quartz (30-35%), K-feldspar (30%), plagioclase (25%), biotite (5-10%) ± magnetite; CI=5-10; variable MS: 0.05-17.
Gd Biotite granodiorite: light pinkish grey to grey; variable from medium grained, well foliated and locally gneissic to coarse grained, homogeneous and massive; locally cut granitic pegmatite sheets and dykes; plagioclase, quartz, K-feldspar, biotite (5-15%), magnetite (0-2%) ± hornblende; CI=5-15; variable MS: 0.2-50.
Gdg Garnetiferous granodiorite gneiss: grey to pinkish grey; medium to coarse grained;
homogeneous; gneissic; moderately to strongly foliated, locally mylonitic; plagioclase, quartz (25-30%), biotite (5-10%), garnet (0-10%), magnetite (1-3%); CI=10-15; variable MS: 0.1-20.
T Biotite tonalite (-granodiorite): white, light grey to light pinkish grey; medium to coarse grained;
homogeneous; massive to moderately foliated, locally gneissic; cut by late granite pegmatite dykes; contains screens and xenoliths of units Mv and Am; plagioclase, quartz (25-35%), biotite (5-10%) ± hornblende; CI=5-10; very low MS: 0.05-0.5, erratic high values; <1% potassium based on spectrometer.
Di Diorite, microdiorite: salt and pepper; fine to medium grained; homogenous, equigranular; moderately to strongly foliated; local amphibolite inclusions and transposed tonalitic sheets; plagioclase (50-70%), hornblende (15-20%), biotite (5-10%), quartz (0-5%) ± titanite ± garnet; CI=25-35; low MS: 0.4-0.6.
Ga Gabbro: mottled black and white, greenish black; generally medium to coarse grained;
moderately to strongly foliated; heterogeneous with abundant cross-cutting tonalitic sheets; plagioclase, hornblende (35-60%) ± clinopyroxene; CI=35-70; generally low to moderate MS: 0.4-0.7, erratic high values.
Px Pyroxenite, melagabbro: black to pale green; medium to coarse grained; cut by tonalitic sheets
(unit T) and granitic pegmatite (unit P); CI=75-95; generally low to moderate MS: 0.4-0.7, erratic high values.
Supracrustal Rocks Ps Feldspathic psammite (psammopelite, feldspathic quartzite): grey to brownish grey; fine
grained; equigranular; layered on cm- to dm-scale; interbedded with migmatitic psammopelite (unit Psp); well foliated and locally gneissic; contains up to 20% dismembered/boudinaged quartz veins; quartz (25-50%), plagioclase (20-30%), K-feldspar (10-30%), biotite (5-10%), muscovite (1-10%) ± graphite ± garnet; CI=5-10; low MS: 0.2-0.3; relatively high potassium content based on spectrometer.
Psp Migmatitic feldspathic psammopelite (-psammite): grey to brownish grey; fine to medium
grained; well foliated, locally gneissic; compositionally layered on cm- to dm-scale, psammopelitic layers predominating over minor psammitic layers; generally migmatitic with 10-20% transposed granitic leucosome; late cross-cutting granite pegmatite dykes; quartz, plagioclase, K-feldspar, biotite (10-15%), muscovite (0-10%) ± graphite ± sillimanite; CI=10-25; generally low MS: 0.15-0.4; high potassium based on spectrometer.
Fv Felsic volcanic rock: grey; fine to medium grained; layered; strongly foliated to mylonitic;
interlayered succession (m-scale) of felsic to intermediate volcaniclastic rocks; cut by rhyolitic sills and later mafic and aplitic dykes; contains local cm-thick biotite-rich veins with bleached feldspathic margins; plagioclase, quartz, K-feldspar, biotite (5-10%), garnet (0-5%); CI=10; low MS: 0.3.
Iv Intermediate volcanic and volcaniclastic rock: light grey, salt and pepper; fine grained;
equigranular, mostly non-descript, in part compositionally layered on cm- to dm-scale, weakly foliated to sheared, locally lineated; in part interlayered with mafic rocks; locally intruded by granitic dykes; plagioclase (50-70%), hornblende (15-35%), epidote (0-15%); CI=15-35; low to moderate MS: 0.4-0.8.
Mvt ‘Trachytic’-textured porphyritic mafic volcanic rock: dark grey to greenish black; fine to medium grained; weakly foliated to sheared; characterized by mm- to cm-long, randomly to flow-oriented plagioclase phenocrysts; with calc-silicate layers and locally abundant garnet porphyroblasts with variably developed plagioclase decompression haloes; intruded by locally abundant tonalitic sheets (unit T) and later granitic pegmatite (unit P); derived from volcanic flows and subvolcanic intrusions; hornblende (40-60%), plagioclase (20-40%), epidote (5-20%), quartz (5%), garnet (0-10%) ± pyroxene ± titanite ± carbonate ± sulphides; CI=40-60; moderate MS: 0.5-0.7.
Mva Altered mafic volcanic rock: dm- to outcrop-scale zones of quartz-garnet ± amphibole
(?cummingtonite) alteration zones invading mafic volcanic rocks; quartz (20-40%), hornblende (5-15%), garnet (5-15%), biotite (2-15%), magnetite (0-2%), pyrite (0-2%), chlorite (2-5%); high MS: 4-15.
Mvc Layered calc-silicate rock: possibly representing highly strained quartz-epidote altered
mafic volcanic rocks; transposed layering on dm-scale; with abundant diopside (40%), epidote or clinozoisite (30%), carbonate.
Mvp Pillowed mafic volcanic flow: locally cut by 20-50 cm thick tonalitic sheets.
Am Amphibolite: dark green to greenish grey; fine to medium grained; homogeneous to layered on
dm-scale; massive to strongly foliated; 20-50% transposed tonalitic layers; cut by granitic pegmatite dykes that are locally folded; derived from both mafic volcanic and gabbroic protoliths; hornblende (50-60%), plagioclase (20-40%), clinopyroxene (0-15%) ± titanite ± epidote ± garnet; CI=50-60; moderate MS: 0.5-0.7.
1 Colour Index 2 Magnetic Susceptibility in 10-3 SI units 3 MacFarlane, N.D. and Mossman, D.J. (1982): Geology of the Nemeiben Lake ultramafic complex, north-
central Saskatchewan, CIM Bull., v75, no837, p83-91.
Besnard
MorinLake
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73P-05 73P-06 73P-07
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73I-13 73I-1573I-14
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RM1001-052 RM1001-051
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Bell Bay
Wadin Bay
Synform Lake
Midway Lake
Midway Creek
Cycloid Lake
Burgess Lakes
Nemeiben Lake
Sunset Island
McBeth Island
Thorson IslandNemeiben Creek
Whitmore Island
Munroe Peninsula
Sucker River 156C
Angus Lake
Elizabeth Lake
Lac La Ronge
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0 0.5 1 1.5 20.25Kilometres
0 0.25 0.5 0.75 1Miles
This map
Although the Ministry of Energy and Resources has exercised all reasonable care in the compilation, interpretation, and production of this item, it is not possible to ensure total accuracy, and all persons that rely on the information contained herein do so at their own risk. The Ministry of Energy and Resources and the Government of Saskatchewan do not accept liability for any errors, omissions or inaccuracies that may be included in or derived from, this item.
Glacial drift
Grad
ation
al Co
ntacts
Catalogue Number 2010-4.2-(1)The area was mapped by Ralf Maxeiner and Kate MacLachlan , in the summer of 2010, with the assistance of Anna Torgunrud, Kyle Blazek, and Cameron MacKay. This map was printed from the geologist’s digital file. Geological data were processed using Microsoft Access, and ArcView 9.3 software. Base maps were compiled from CanVec 1:50 000 scale digital cartographic maps produced by Natural Resources Canada. Grid coordinates are NAD83 CSRS98 UTM zone 13. The map was processed overall using ArcView 9.3 software. The map is issued in a package with the Summary of Investigations 20 10 Volume 2, Saskatchewan Geological Survey, and is available separately from http://www.er.gov.sk.ca/geo-reports. This map accompanies the following publication: Maxeiner, R.O. and MacLachlan, K. (2010): Preliminary bedrock geology of the eastern Nemeiben Lake area in the vicinity of the Elizabeth Lake Cu deposit and the Dunlop Cu -Ni deposit, western Glennie Domain (Parts of NTS 73P03, 06, and 07); in Summary of Investigations 2010 Volume 2, Saskatchewan Geological Survey, Sask . Ministry of Energy and Resources, Misc. Rep. 2010-4.2. This map may be referenced as: Maxeiner, R.O. and MacLachlan, K. (2010): Geology of the eastern Nemeiben Lake a rea (Parts of NTS 73P03, 06, and 07); 1:20 000 scale prelim. map; with Summary of Investigations 2010, Volume 2, Saskatchewan Geological Survey, Sask. Ministry of Energy and Resources, Misc. Rep. 20 10-4.2.
Location Map
Legend
P
Gs
Mdi
NPx
NDnNWb
NWl
Lgd
G
Gd
Gdg
T
Di
Ga
Mvc
AmMvp
Mva
Mvt
Fv
Psp
Iv
Ps
Px
Geological contact: defined to approximate Airphoto lineament Trace of axial planes: F1, F2, F3, F4 Mineral occurrence, trench cpy - chalcopyrite, po - pyrrhotite, py – pyrite, mal – malachite
Mineral occurrence with SMDI number (copper, nickel, molybdenum)
Geochemistry sample (analyses listed in table) Outcrop examined Glacial striae (macro- and microstriations, chattermarks): first generation; second generation Sedimentary layering, igneous layering: younging direction unknown (inclined, vertical), younging
direction known Main foliation (commonly composite S1/S2 fabric): inclined, vertical
Second generation foliation: inclined, vertical
Third generation foliation: inclined, vertical
Fold axial plane (inclined): first generation (isoclinal), second generation (isoclinal to tight; with local axial planar biotite, retrogressed sillimanite, leucosome layers), third generation (tight east dipping folds; locally with weak axial planar schistosity), fourth generation (metre-scale, upright, gentle folds)
Fold axial plane (vertical): first generation (isoclinal), third generation (tight east dipping folds; locally with weak axial planar schistosity)
Lineation (unknown age): unknown type, mineral lineation, stretching lineation
Fold axis (symmetry unknown): first generation, second generation
Fold axis (symmetrical): second generation, third generation
Fold axis (s-fold): second generation, third generation
Fold axis (z-fold): second generation
Small ductile shear (inclined): sense unknown, dextral
Small ductile shear (vertical): sense unknown
Dyke (inclined, vertical): pegmatite (P), tonalite (T), microdiorite and diorite (Di), granodiorite (Gd)
High strain Abundant granite sheets Abundant tonalite sheets Building Muskeg Reef or small island Contour intervals (10m) Road
Analyte Symbol Pd Pt Au Au Ag Cu Cd Mo Pb Ni Zn S Al Ba Be Ca Co Cr Eu Fe Hf K Mg Mn Na P Rb Sb Sc Sr Ta Ti Th U V Y La Ce Nd Sm Yb Lu MassUnit Symbol ppb ppb ppb ppb ppm ppm ppm ppm ppm ppm ppm % % ppm ppm % ppm ppm ppm % ppm % % ppm % % ppm ppm ppm ppm ppm % ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm g
Sample Station Detection Limit 1 1 2 1 0.3 1 0.3 1 3 1 1 0.01 0.01 50 1 0.01 1 2 0.2 0.01 1 0.01 0.01 1 0.01 0.001 15 0.1 0.1 1 0.5 0.01 0.2 0.5 2 1 0.5 3 5 0.1 0.2 0.05Number Number Analysis Method A A A B C D D D D C C D D B D D B B B B B D D D B D B B B D B D B B D D B B B B B B BKM1001-002 KM10-03-ST03 < 2 < 0.3 14 < 0.3 < 1 16 20 69 < 0.01 6.64 950 2 1.29 9 70 1.3 3.24 7 1.67 1.09 441 2.13 0.064 116 0.4 10.5 194 < 0.5 0.34 14.4 4.6 66 17 43.9 84 27 5.6 3.3 0.6 27.5KM1001-001 KM10-02-ST05 < 2 < 0.3 22 0.4 < 1 5 4 32 0.11 0.1 60 < 1 0.2 < 1 41 < 0.2 5.97 < 1 0.03 0.04 90 0.02 0.006 20 0.6 0.2 2 < 0.5 < 0.01 < 0.2 < 0.5 37 < 1 0.6 < 3 < 5 < 0.1 < 0.2 < 0.05 28.5RM1001-016 RM10-09-ST14 12 < 0.3 129 0.6 < 1 < 3 69 142 0.42 5.97 < 50 11 10.7 31 114 0.6 9.19 < 1 0.37 3.37 2630 1.23 0.042 < 15 0.4 34 93 1 0.4 < 0.2 < 0.5 238 26 4.2 8 7 2.1 4.1 0.4 35.2RM1001-020 RM10-11-ST04 < 2 < 0.3 163 0.7 < 1 < 3 98 104 0.96 6.78 180 < 1 7.25 53 150 0.9 7.96 2 0.68 3.88 1370 1.49 0.031 < 15 0.4 45.4 130 < 0.5 0.62 < 0.2 1.6 349 22 3.4 11 < 5 1.9 3 0.35 30.2RM1001-026 RM10-14-ST13 < 2 < 0.3 34 < 0.3 2 < 3 2 28 1.43 6.36 < 50 1 0.6 5 16 2 3.86 6 0.32 0.97 434 3.93 0.049 32 0.8 12 77 < 0.5 0.33 2.8 1.1 9 11 45.2 92 36 8.4 4.8 0.78 29.3RM1001-027 RM10-14-ST14 < 2 0.4 22 < 0.3 < 1 < 3 4 11 0.72 7.42 480 2 1.39 10 14 1.8 3.74 6 0.69 0.74 417 3.95 0.054 < 15 0.6 10.9 272 1.8 0.34 2.6 1.6 31 21 25.6 64 23 6.2 4.5 0.6 25.9RM1001-035 RM10-18-ST17 < 2 0.3 5 < 0.3 2 < 3 4 15 0.37 6.84 1020 2 0.97 8 15 1.1 2.24 6 1.01 0.87 252 4.08 0.03 < 15 0.2 6.8 158 < 0.5 0.25 3.2 2.9 27 10 22 45 17 4 3.7 0.63 28.8RM1001-036 RM10-18-ST22 < 2 < 0.3 4 < 0.3 13 < 3 3 8 0.95 6.26 780 2 0.77 10 13 1.6 1.67 6 0.73 0.59 137 4.24 0.022 < 15 < 0.1 8.1 102 < 0.5 0.18 3.7 < 0.5 15 14 25.3 58 28 6.1 4 0.67 28.2RM1001-039 RM10-20-ST07 < 2 < 0.3 274 0.6 < 1 < 3 107 78 0.15 6.29 < 50 < 1 7.16 83 190 0.7 6.79 2 0.34 4.39 600 2.43 0.023 < 15 0.2 34.4 222 < 0.5 0.3 < 0.2 1.2 225 7 1.8 6 < 5 1.7 0.8 0.09 27.8RM1001-043 RM10-24-ST01 60 5 13 18 0.7 2330 0.5 < 1 11 2620 40 1.52 6.75 < 50 < 1 7.11 152 228 0.3 7.38 1 0.4 6.06 641 1.28 0.004 32 < 0.1 38.8 294 < 0.5 0.32 0.4 1 176 8 1.9 7 < 5 1 1.3 0.09 31.6
Analyte Symbol SiO2 Al2O3 Fe2O3 MnO MgO CaO Na2O K2O TiO2 P2O5 LOI Total Sc V Cr Co Ni Cu Zn Ga Ge Rb Sr Y Zr Nb Ag Ba La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Pb Th UUnit Symbol % % % % % % % % % % % % ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm
Sample Station Detection Limit 0.01 0.01 0.01 0.001 0.01 0.01 0.01 0.01 0.001 0.01 0.01 1 5 20 1 20 10 30 1 0.5 1 2 0.5 1 0.2 0.5 3 0.05 0.05 0.01 0.05 0.01 0.005 0.01 0.01 0.01 0.01 0.01 0.005 0.01 0.002 0.1 0.01 0.5 5 0.05 0.01Number Number Analysis Method E E E E E E E E E E E E E E F F F F F F F F E F F F F E F F F F F F F F F F F F F F F F F F F FRM1001-050 RM10-11-ST03 49.43 14.28 12.55 0.18 8.11 10.85 2.04 0.8 0.861 0.06 1.18 100.3 44 316 190 47 100 150 90 16 2 10 86 18.5 50 2 < 0.5 74 3.27 7.78 1.18 5.96 2.1 0.794 2.46 0.49 3.43 0.73 2.07 0.308 2.19 0.387 1.4 0.14 0.7 < 5 0.22 0.13RM1001-051 RM10-11-ST14 49.42 13.98 12.19 0.202 7.86 12.74 1.6 0.34 0.772 0.06 1.01 100.2 47 295 180 48 90 50 90 15 2 3 99 16.1 41 1.4 < 0.5 62 2.16 5.31 0.9 4.97 1.74 0.666 2.18 0.44 3.06 0.65 1.9 0.284 1.96 0.349 1.2 0.1 0.5 < 5 0.13 0.08RM1001-052 RM10-11-ST15 48.24 14.53 11.63 0.176 8.4 13.45 1.62 0.26 0.812 0.11 1.32 100.6 47 292 330 53 130 120 100 16 1.9 3 149 17.2 38 1 < 0.5 58 2.84 7.39 1.2 6.29 2.1 0.783 2.52 0.48 3.22 0.69 1.98 0.298 2.12 0.373 1.2 0.13 0.6 < 5 0.18 0.15RM1001-053 RM10-29-ST02 51.08 14.93 10.9 0.181 6.23 11.38 2.4 0.24 0.95 0.07 1.24 99.6 47 340 170 47 100 100 90 16 1.8 2 93 21 47 1.3 < 0.5 58 2.53 6.89 1.12 5.86 2.13 0.818 2.79 0.56 3.88 0.84 2.45 0.379 2.65 0.459 1.5 0.13 0.7 < 5 0.15 0.16RM1001-5004 RM10-12-ST18 75.05 15.63 0.8 0.01 0.17 2.33 5.83 0.51 0.065 0.02 0.34 100.8 < 1 < 5 < 20 < 1 < 20 < 10 < 30 18 0.6 11 1059 < 0.5 52 0.4 < 0.5 376 1.08 1.94 0.21 0.67 0.11 0.227 0.06 0.01 0.07 0.02 0.07 0.013 0.09 0.014 1.6 0.04 1.6 5 < 0.05 0.09RM1001-5005 RM10-16-ST09 61.09 16.99 5.29 0.077 3.4 4.98 4.28 1.66 0.597 0.25 1.07 99.69 12 88 120 16 40 20 90 21 1.2 33 883 15.3 170 5.7 < 0.5 740 25.2 51.5 6.84 28 5.63 1.49 4.15 0.59 3.18 0.62 1.68 0.236 1.55 0.268 4 0.3 0.9 8 3.25 1.34
Note: Analysis methods are A - FA-MS; B - INAA; C - MULT B / TD-ICP; D - TD-ICP; E - FUS-ICP; F - FUS-MSDigital data and UTM coordinates available from [email protected]
Analyses performed by Activation Laboratories, Ancaster, ONT
Table of Geochemical Analyses
Bedrock Geology of the Eastern Nemeiben Lake Area (Parts of NTS 73P03, 06, and 07) at 1:20 000 scale Preliminary Geological Map (2010)
by R.O. Maxeiner and K. MacLachlan
Symbols
