Improved teleseismic Green's functions and western Canada mantle structure and evolution ...

• Main Author: Mercier, Jean-Philippe
• Format: Text
• Language: English
• Published: University of British Columbia 2008
• Subjects: Northwest Territories; Canada; Liard
• Online Access: https://dx.doi.org/10.14288/1.0052560; https://doi.library.ubc.ca/10.14288/1.0052560

The present thesis is divided into three distinct parts and focuses both on the improvement of deconvolution technique in a teleseismic context for crustal and upper-mantle studies and on the understanding of western Canada structure and evolution through seismic imaging. The first part presents estimates of the P-component of the teleseismic-P Green's functions for three stations of the Canadian National Seismic Network (CNSN) obtained using a new deconvolution technique. Our results show evidence of the principal, first-order scattered Moho phases and, in particular, the Pp_Mp. The second part presents teleseismic receiver functions from 20 broadband three-component seismometers deployed along the MacKenzie-Liard Highway in Canada's Northwest Territories as part of the joint Lithoprobe-IRIS CAnadian NOrthwest Experiment (CANOE). These stations traverse a Paleoproterozoic suture and subduction zone that has been previously documented in detail to mantle depths using seismic reflection profiling. Our results ...