HR: 1340h
AN: V43B-1370    [Abstracts]
TI: P and S body wave travel-time tomography of northwestern Canada
AU: * Mercier, J
EM: jmercier@eos.ubc.ca
AF: Department of Earth and Ocean Sciences, The University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada
AU: Bostock, M G
EM: bostock@eos.ubc.ca
AF: Department of Earth and Ocean Sciences, The University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada
AU: Gaherty, J B
EM: gaherty@ldeo.columbia.edu
AF: Lamont-Doherty Earth Observatory, 61 Route 9W, Palisades, NY 10964, United States
AU: Garnero, E J
EM: garnero@asu.edu
AF: School of Earth and Space Exploration, Arizona State University, Bateman Physical Sciences Center F-wing, Room 686, Tempe, AZ 85287, United States
AU: Revenaugh, J
EM: justinr@umn.edu
AF: Department of Geology and Geophysics, University of Minnesota, 10 Pillsbury Drive SE, Minneapolis, MN 55455, United States
AB: Northwestern Canada is a unique collage of different geologic domains that accreted together at different stages in the planet's history. In this region the rock record spans close to 4.0 Ga, from Early Archean to the present day, over a distance of three thousand kilometers. This mosaic represents the most nearly complete and continuous sampling of geological time on the surface of the Earth. The IRIS-PASSCAL/{\sc Lithoprobe}-sponsored Canada NOrthwest Experiment (CANOE) experiment was designed to address fundamental questions on the variation in structure and geometry of the lithosphere from early Archean to present. Nearly 60 broadband, three-component instruments were deployed during a period of over two years between June 2003 to September 2005 along aY-shaped array with over 1000km aperture. The three legs of the array radiate away from Fort Nelson, the array center, to termini at Yellowknife, Whitehorse and Edmonton. In this poster, we present P and S body-wave travel-time tomography images of upper mantle velocity structure beneath the array using 675 earthquakes of magnitude 5 and above in the epicentral range of 30\circ to 100\circ recorded by the CANOE array.
DE: 7203 Body waves
DE: 7218 Lithosphere (1236)
DE: 7270 Tomography (6982, 8180)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting