Teleseismic investigation of the upper mantle beneath the Archean Slave craton, NW Canada, and of the Moho beneath Canadian broad-band stations ...
In this thesis I apply various algorithmic techniques to teleseismic data with a twofold objective: to investigate upper mantle structure beneath the Archean Slave craton to gain an understanding of early craton formation and kimberlite genesis, and to characterize elastic properties, including anis...
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| Format: | Text |
| Language: | English |
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University of British Columbia
2009
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| Online Access: | https://dx.doi.org/10.14288/1.0052533 https://doi.library.ubc.ca/10.14288/1.0052533 |
| Summary: | In this thesis I apply various algorithmic techniques to teleseismic data with a twofold objective: to investigate upper mantle structure beneath the Archean Slave craton to gain an understanding of early craton formation and kimberlite genesis, and to characterize elastic properties, including anisotropy, at Moho levels beneath Canadian seismic stations. The Archean Slave craton is the site of the oldest known rocks on Earth and of numerous diamondiferous kimberlites. The Yellowknife seismic array and 13 temporary stations recorded teleseisms between November 1996 and May 1998. P-wave travel-time tomography reveals the oldest part of the craton, the Central Slave Basement Complex, to be underlain by the fastest seismic velocities. Receiver function analysis requires only the Moho as a major 5-wave velocity discontinuity and points to a fairly constant crustal thickness throughout the craton. SKS splitting analysis shows little variation in results across the array, supporting present-day plate motion as the ... |
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