black lake uranium property
TRANSCRIPT
Black Lake Uranium Property
Northern Saskatchewanby
Delio TortosaGeological Consultant
January, 2015
Athabasca Basin Location MapSaskatchewan
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
Distribution of Mineral Dispositions Athabasca Basin
Black Lake Property
Regional Geology and Geophysics
Geological Map of the Athabasca Basin
Regional Magnetic Field, Northern Saskatchewan and Alberta
after Card et al. 2007
50 Km
Regional Gravity 1VD and the Athabasca Basin
Snow
bird
Tec
toni
c Zo
ne
50 Km
Athabasca Basin, Late Regional Faults, and Gravity Lows
Black Lake
Property
Low Gravity Zones
WMTZ
Black Lake PropertyLand Tenure
Black Lake Area Mineral Dispositions
Black Lake Property
Nisto MineBlack Lake Uranium Prospect
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
Local Geology, Geophysics and Geochemical Surveys
Black Lake Area Geology
Nisto MineBlack Lake Uranium Prospect
Black L
ake F
ault
Plat
t Cre
ek F
ault
Black Lake Area Regional Gravity 1VD
Black Lake Area Regional Magnetic 1VD
Black Lake Area Regional Alteration Trends
Detailed Geology, Geophysics and Geochemical SurveysBlack Lake Property
Black Lake PropertyLocal Geology
Manitou Falls Formation
Lazenby Lake Formation
Wolverine Point Formation
Black Lake PropertyGravity Vertical Gradient Survey
Black Lake PropertyMagnetic Vertical Gradient Survey
Black Lake PropertyMegaTEM Survey Decay Constant (Tao)
Black Lake PropertyZTEM Survey 180 Hz
Black Lake PropertyGround Fixed Loop TDEM Survey
Surface Geochemical Exploration and
Diamond DrillingBlack Lake Property and Area
Dickite + Kaolinite ContentHistorical Drill Holes
JNR Resources 1998 and 2008
Illite ContentHistorical Drill Holes
JNR Resources 1998 and 2008
Black Lake Uranium Property
JNR DDH Clay Alteration
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
Black Lake Property
After Wright and Potter, 2014
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
Pb 207/206 ratios in basal Athabasca SandstoneBlack Lake area
3D visualizationSummary and
Recommendations
DEM, Black Lake Area, Looking NE
Gravity Gradient Tzz, Black Lake Area, Looking NE
Measured Magnetic Vertical Gradient draped over
Gravity Gradient Tzz, Black Lake Area, Looking NE
ZTEM 45 Hz overlain on Garvity Gradient Tzz, Black Lake Property, Looking NE
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.
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
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).
(after Marlatt and Kyser, 2011)
Athabasca Basin Uranium Exploration ‘Learning Curve’
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