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TitleKimberlite trends in NW Canada
AuthorSnyder, D BORCID logo; Lockhart, G D
SourceJournal of the Geological Society vol. 162, no. 5, 2005 p. 737-740,
Alt SeriesGeological Survey of Canada, Contribution Series 2004015
PublisherGeological Society of London
Mediapaper; on-line; digital
File formathtml; pdf
ProvinceNorthwest Territories
NTS75E; 75F; 75G; 75H; 75I; 75J; 75K; 75L; 75M; 75N; 75O; 75P; 76; 85F; 85G; 85H; 85I; 85J; 85K; 85N; 85O; 85P; 86
AreaGreat Slave Lake; Ekati Diamond Mine
Lat/Long WENS-117.0000 -105.0000 68.0000 61.0000
Subjectseconomic geology; geophysics; kimberlites; diamond; mineral deposits; craton; lithosphere; anisotropy; s waves; seismic methods; Diamonds
Illustrationslocation maps; 3-D models; graphs
ProgramPOLARIS - Portable Observatories for Lithospheric Analysis and Research Investigating Seismicity
Released2005 09 01
AbstractKimberlite 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.

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