| Title | Kimberlite trends in NW Canada
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| Author | Snyder, D B ;
Lockhart, G D |
| Source | Journal of the Geological Society vol. 162, no. 5, 2005 p. 737-740, https://doi.org/10.1144/0016-764905-010 |
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| Year | 2005 |
| Alt Series | Geological Survey of Canada, Contribution Series 2004015 |
| Publisher | Geological Society of London |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | html; pdf |
| Province | Northwest Territories |
| NTS | 75E; 75F; 75G; 75H; 75I; 75J; 75K; 75L; 75M; 75N; 75O; 75P; 76; 85F; 85G; 85H; 85I; 85J; 85K; 85N; 85O; 85P; 86 |
| Area | Great Slave Lake; Ekati Diamond Mine |
| Lat/Long WENS | -117.0000 -105.0000 68.0000 61.0000 |
| Subjects | economic geology; geophysics; kimberlites; diamond; mineral deposits; craton; lithosphere; anisotropy; s waves; seismic methods; Diamonds |
| Illustrations | location maps; 3-D models; graphs |
| Program | POLARIS - Portable Observatories
for Lithospheric Analysis and Research Investigating Seismicity |
| Released | 2005 09 01 |
| 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. |
| GEOSCAN ID | 215447 |
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