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Kimberlite trends in NW Canada

D. B. Snyder and G. D. Lockhart
Journal of the Geological Society, 162, 737-740, 1 September 2005, https://doi.org/10.1144/0016-764905-010
D. B. Snyder
11Geological Survey of Canada, 615 Booth Street, Ottawa, ON. K1A 0E, Canada (e-mail: dsnyder@NRCan.gc.ca)
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G. D. Lockhart
33Present address: Indicator Minerals, Inc., 1440 625 Howe Street, Vancouver, BC V6C 2T6, Canada
22BHP-Billiton Diamonds Inc., 1699 Powick Road, Kelowna BC V1X 4L1, Canada
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Abstract

Kimberlite deposits attract much interest as the host rock for diamonds, but their eruption mechanisms and deep root structure remain poorly perceived. Independent geochronological and seismic shear-wave anisotropy studies in NW Canada near the world's newest diamond mines revealed an unexpected correlation in structural trends. Age of eruption grouped 36 kimberlites into linear clusters; forward modelling of shear-wave delays indicated two distinct layers of seismic anisotropy with a boundary about 120 km deep. The similarity of inferred age and trend direction at surface and at depth indicates that these kimberlites erupted along lithospheric-scale fractures oriented by continental stress fields related to North American plate motions.

  • Slave craton
  • kimberlite pipes
  • lithosphere
  • anisotropy
  • diamonds
  • © 2005 The Geological Society of London
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Journal of the Geological Society: 162 (5)
Journal of the Geological Society
Volume 162, Issue 5
September 2005
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Kimberlite trends in NW Canada

D. B. Snyder and G. D. Lockhart
Journal of the Geological Society, 162, 737-740, 1 September 2005, https://doi.org/10.1144/0016-764905-010
D. B. Snyder
11Geological Survey of Canada, 615 Booth Street, Ottawa, ON. K1A 0E, Canada (e-mail: dsnyder@NRCan.gc.ca)
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
G. D. Lockhart
33Present address: Indicator Minerals, Inc., 1440 625 Howe Street, Vancouver, BC V6C 2T6, Canada
22BHP-Billiton Diamonds Inc., 1699 Powick Road, Kelowna BC V1X 4L1, Canada
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site

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Kimberlite trends in NW Canada

D. B. Snyder and G. D. Lockhart
Journal of the Geological Society, 162, 737-740, 1 September 2005, https://doi.org/10.1144/0016-764905-010
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    • Geochronology of kimberlite clusters.
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