The Committee Bay Drift Prospecting Survey, central...
Transcript of The Committee Bay Drift Prospecting Survey, central...
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The Committee Bay Drift Prospecting Survey,central mainland Nunavut
November 22, 2001
QUATERNARY COMPONENTof the
COMMITTEE BAY PROJECT
E. Little (C-NGO), I. McMartin (GSC), C. Ozyer (UWO), D. Utting (SFU), and T. Ferbey (UVIC)
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Study Area
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Study Area
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Study Area
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Study Area
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MultidisciplinaryGeoscienceApproach
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Geophysics
MultidisciplinaryGeoscienceApproach
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Geophysics
Bedrock Geology
MultidisciplinaryGeoscienceApproach
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Geophysics
Bedrock Geology
Quaternary Geology
MultidisciplinaryGeoscienceApproach
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Field Objectives
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Field Objectives
•Terrain Inventory
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Field Objectives
– Surficial mapping•Terrain Inventory
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Field Objectives
– Surficial mapping– Geomorphology/landscape evolution
•Terrain Inventory
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Field Objectives
– Surficial mapping– Geomorphology/landscape evolution– Ice-movement indicators
•Terrain Inventory
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Field Objectives
– Surficial mapping– Geomorphology/landscape evolution– Ice-movement indicators
•Terrain Inventory
•Drift Sampling
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Field Objectives
– Surficial mapping– Geomorphology/landscape evolution– Ice-movement indicators
•Terrain Inventory
•Drift Sampling– Base metals & Au-Ni-PGE’s
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Field Objectives
– Surficial mapping– Geomorphology/landscape evolution– Ice-movement indicators
•Terrain Inventory
•Drift Sampling– Base metals & Au-Ni-PGE’s– Kimberlite indicator minerals
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Developing a strategy...Till-Geochemistry Survey
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Developing a strategy...Looking NW at a fluted till blanket deposit (56 K/1).
Till-Geochemistry Survey
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Developing a strategy...Till-Geochemistry Survey
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Developing a strategy...
Multiple ice-movement directionsrecorded at site in 56J
Till-Geochemistry Survey
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Piecing together a history...
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Ice-movement data...
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Little, 2001
Ice-movement variation over TIME
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The
Plot
Thickens…
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Little et al., 2002
Ice-movement variation overSPACE
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Strategic Till SamplingProtocol
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Strategic Till SamplingProtocol
•Identification of areas with highest potential for base-metals and Au-Ni-PGE’s.
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Strategic Till SamplingProtocol
•Identification of areas with highest potential for base-metals and Au-Ni-PGE’s.
•Prioritize these areas from highest to lowest.
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Strategic Till SamplingProtocol
•Identification of areas with highest potential for base-metals and Au-Ni-PGE’s.
•Prioritize these areas from highest to lowest.
•Systematic sampling outside these areas for unknown point sources (including kimberlites).
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Till Blanket
Roches Moutonées
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Till Blanket
Roches MoutonéesS N
Quaternary history
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Till Blanket
Roches MoutonéesS N
Quaternary history +
mapping(bedrock & surficial)
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Till Blanket
Roches MoutonéesS N
Quaternary history +
mapping(bedrock & surficial)
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Qualitative Till SampleType
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Qualitative Till SampleType
Type I
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Qualitative Till SampleType
Type I
Type II
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Qualitative Till SampleType
Type I
Type II
Type III
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3 kg Samples (n=309)
10 kg Samples (n=209)
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3 kg Samples (n=309)
•Pebble lithology (4-8mm)•Carbonate content•Textural analysis•Trace/major elements (clay)
10 kg Samples (n=209)
•Heavy Mineral Concentrate (NMF)•VG•Indicator Minerals•Trace/major elements (silt/clay)•Pt, Pd from FA-ICP-AES (pulverized sand fractions)•Au from FA-AA and INAA (pulverized sand fractions)
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Developing a strategy...Kimberlite Indicator Mineral Survey
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20 kg Samples(n=165)
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20 kg Samples(n=165)
•Textural analysis•Heavy:Light mineral ratios•Heavy Mineral Concentrate (NMF)•VG•Indicator Minerals
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COMMITTEE BAY
QUATERNARY COMPONENT
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• Committee Bay offers some of the most interesting surficial geology and geomorphology in Canada.
COMMITTEE BAY
QUATERNARY COMPONENT
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• Committee Bay offers some of the most interesting surficial geology and geomorphology in Canada.
• Systematic mapping of these deposits is needed to reconstruct detailed Quaternary History.
COMMITTEE BAY
QUATERNARY COMPONENT
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• Committee Bay offers some of the most interesting surficial geology and geomorphology in Canada.
• Systematic mapping of these deposits is needed to reconstruct detailed Quaternary History.
• An integrated multidisciplinary geoscience approach allows strategic drift sampling:
COMMITTEE BAY
QUATERNARY COMPONENT
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• Committee Bay offers some of the most interesting surficial geology and geomorphology in Canada.
• Systematic mapping of these deposits is needed to reconstruct detailed Quaternary History.
• An integrated multidisciplinary geoscience approach allows strategic drift sampling: – maximize efficient sample coverage
COMMITTEE BAY
QUATERNARY COMPONENT
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• Committee Bay offers some of the most interesting surficial geology and geomorphology in Canada.
• Systematic mapping of these deposits is needed to reconstruct detailed Quaternary History.
• An integrated multidisciplinary geoscience approach allows strategic drift sampling: – maximize efficient sample coverage– decrease exploration risk
COMMITTEE BAY
QUATERNARY COMPONENT
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Till survey 56K, J(north), O(south)…
Kimberlite Indicator Mineral survey...
Results...
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GSC Open FileSpring 2002
Spring 2003
Till survey 56K, J(north), O(south)…
Kimberlite Indicator Mineral survey...
Results...
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Acknowledgements
November 22, 2001
QUATERNARY COMPONENTof the
COMMITTEE BAY PROJECT
I. McMartin (Geological Survey of Canada, Ottawa)
C. Ozyer (University of Western Ontario, London, ON)
D. Utting (Simon Fraser University, Burnaby, BC)
T. Ferbey (University of Victoria, Victoria, BC)