Black Lake Uranium Property
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Transcript of Black Lake Uranium Property
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Black Lake Uranium Property
Northern Saskatchewanby
Delio TortosaGeological Consultant
January, 2015
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Athabasca Basin Location MapSaskatchewan
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Uranium Deposits and Mines, N. Sask.
McArthur River
Cigar Lake
Key Lake
Beaverlodge Area
Cluff Lake
Rabbit Lake
Snow
bird
Tecto
nic Z
one
Black Lake Uranium Property
Nisto Uranium Mine
Centennial Deposit
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Distribution of Mineral Dispositions Athabasca Basin
Black Lake Property
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Regional Geology and Geophysics
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Geological Map of the Athabasca Basin
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Regional Magnetic Field, Northern Saskatchewan and Alberta
after Card et al. 2007
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50 Km
Regional Gravity 1VD and the Athabasca Basin
Snow
bird
Tec
toni
c Zo
ne
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50 Km
Athabasca Basin, Late Regional Faults, and Gravity Lows
Black Lake
Property
Low Gravity Zones
WMTZ
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Black Lake PropertyLand Tenure
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Black Lake Area Mineral Dispositions
Black Lake Property
Nisto MineBlack Lake Uranium Prospect
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1883,009.053Total
26-Jan-1726-Oct-14861374.305MC00002844Black Lake DT 4
18-Dec-1611-Sep-1432514.119MC00002584Black Lake DT 3
8-Dec-162-Sep-1436575.797MC00002478Black Lake DT 2
8-Dec-162-Sep-1434544.832MC00002477Black Lake DT 1
Due DateEffective
DateUnitsArea (Ha)ClaimName
Black Lake Property
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Local Geology, Geophysics and Geochemical Surveys
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Black Lake Area Geology
Nisto MineBlack Lake Uranium Prospect
Black L
ake F
ault
Plat
t Cre
ek F
ault
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Black Lake Area Regional Gravity 1VD
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Black Lake Area Regional Magnetic 1VD
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Black Lake Area Regional Alteration Trends
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Detailed Geology, Geophysics and Geochemical SurveysBlack Lake Property
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Black Lake PropertyLocal Geology
Manitou Falls Formation
Lazenby Lake Formation
Wolverine Point Formation
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Black Lake PropertyGravity Vertical Gradient Survey
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Black Lake PropertyMagnetic Vertical Gradient Survey
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Black Lake PropertyMegaTEM Survey Decay Constant (Tao)
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Black Lake PropertyZTEM Survey 180 Hz
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Black Lake PropertyGround Fixed Loop TDEM Survey
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Surface Geochemical Exploration and
Diamond DrillingBlack Lake Property and Area
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Dickite + Kaolinite ContentHistorical Drill Holes
JNR Resources 1998 and 2008
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Illite ContentHistorical Drill Holes
JNR Resources 1998 and 2008
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Black Lake Uranium Property
JNR DDH Clay Alteration
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JNR Historical DDHK2O/Al2O3 Ratio
Longitudinal Section
BM-2 (SMDC 1979)
BL-08-104 (JNR 2008)
BL-08-103 (JNR 2008)
BL-08-101 (JNR 2008)
Bla
ck L
ake
Faul
t
Unconformity
Unconformity
Athabasca Sandstone
Basement
Basement
Athabasca Sandstone
2 km 1 km
SW NE
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Black Lake Property
After Wright and Potter, 2014
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After Alexandre et al., 2012
Centennial Uranium DepositPb 207/206 Isotopic Ratios
Pb 207/206 ratio decrease with
increasing depth
Pb 207/206 ratio decrease with increasing
uranium content
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Pb 207/206 ratios in basal Athabasca SandstoneBlack Lake area
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3D visualizationSummary and
Recommendations
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DEM, Black Lake Area, Looking NE
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Gravity Gradient Tzz, Black Lake Area, Looking NE
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Measured Magnetic Vertical Gradient draped over
Gravity Gradient Tzz, Black Lake Area, Looking NE
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ZTEM 45 Hz overlain on Garvity Gradient Tzz, Black Lake Property, Looking NE
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Summary• Airborne geophysical surveys have identified a major lithotectonic boundary
which is thought to be the Snowbird Tectonic Zone and associated late brittle faults,
• Boulder and outcrop sampling have identified a regional alteration zone which follows the NE trend of Black Lake and regional structures,
• Drill holes have verified a strong illite signature reflective of a large-scale hydrothermal system within the regional alteration zone,
• Anomalous pathfinder elements and uranium have been identified in the basal sandstone of the Athabasca, Manitou Falls Formation, along with anomalous Pb 207/206, indicative of a concentrated uranium source,
• ZTEM and ground TDEM surveys have identified a conductive zone occurring in a gravity trough at the transition zone represented by the Snowbird Tectonic Zone and associated structures (Black Lake Fault).
• The Black Lake Property reflects all the characteristics identified above, including a 7 km long untested conductor.
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Recommendations• Complete modeling of the various geophysical surveys covering the
Black Lake Property
• Establish a structural and geological model based on geophysics,geochemistry and geology of the area
• Sample and analyse the 2008 JNR drill holes for Pb isotopic signatures (if the drill core is still available)
• Seismic survey to locate major structures and unconformity offsets
• Continue with the drill program initiated by JNR to test the conductive zone
• Complete comprehensive down-hole geophysical surveys along with lithogeochemical and isotopic analyses, and analysis of clay mineralogy
• Joint Venture with a major uranium producer and acquire a skilled exploration team
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Knowledge Gaps• How significant is the role of regional structures
in the development of large scale uranium-bearing hydrothermal systems in/near the Athabasca Basin?
• There are a limited number of examples of large, high-grade uranium deposit discoveries at significant depths which provide justification for deep drilling programs (Centennial, Shea Creek).
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(after Marlatt and Kyser, 2011)
Athabasca Basin Uranium Exploration ‘Learning Curve’
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Contact Information
Delio Tortosa, P.Eng., M.Sc.Geological Consultant
Tel: 705 946-1040Cell: 705 971-4768
Email: [email protected]
The Black Lake Uranium Property is available for option