Geochemical Exploration through Thick Glacial Cover: a Case History - - PowerPoint PPT Presentation

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Geochemical Exploration through Thick Glacial Cover: a Case History - - PowerPoint PPT Presentation

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Geochemical Exploration through Thick Glacial Cover: a Case History from Kwanika, North-Central BC. by David R Heberlein and Hugh Samson Roundup 2010 The Challenge Nechako River The Challenge Deposits Prospects Why this study? A clear

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Geochemical Exploration through Thick Glacial Cover: a Case History from Kwanika, North-Central BC.

by

David R Heberlein and Hugh Samson Roundup 2010

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SLIDE 2

The Challenge

Nechako River

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SLIDE 3

The Challenge

Deposits Prospects

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Why this study?

  • A clear need to develop geochemical

exploration techniques to see through cover.

  • There is a poor understanding of ‘Deep

Penetrating’ Geochemical methods.

  • Influenced by laboratories who

promote their own often proprietary methods.

  • Relative effectiveness of these

methods is poorly understood.

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Questions

  • Can soil geochemistry see through

glaciofluvial cover?

  • Is there any benefit to using laboratory

specific methods over ‘generic’ techniques?

  • What is the optimum combination of

sample medium and geochemical extraction?

  • Does conventional soil sampling

work in this environment?

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Location Map/Regional Setting

^ _

400 200 Km

Kwanika

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Property Geology and Targets

T1 T2

Courtesy of Serengeti Resources Inc.

Diorite Granite Quartz Monzonite Monzonite Monzodiorite Andesite Gabbro Cache Creek Terrane L E G E N D

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Survey Area

Post-mineral sedimentary basin

T1 T2

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Cross Section of Transect 2

Courtesy of Serengeti Resources Inc.

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Surficial Environment

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Soil Profiles

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Sampling and analyses

Laboratory specific methods

Soil Profile

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Upper B horizon – Aqua Regia

Conventional Soil Sampling

N S

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Ah Horizon – Aqua Regia

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Ah Horizon – Aqua Regia

N S

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Selective and Partial Extraction results – Copper

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Selective and Partial Extraction results – Tungsten

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Comparison of methods

Very Strong Strong Moderate Weak

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Conclusions

  • Yes. Soil Geochemistry can be used.
  • No. Conventional soil sampling is ineffective.
  • No. There is no advantage to using lab specific

methods in this environment.

  • Best response occurs in the Ah horizon.
  • Aqua regia is the best performing digestion.
  • Tungsten is a potentially useful pathfinder.
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Acknowledgements

TSX-V:SIR