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Detailed Reference Information |
Brazier, R.A. and Nyblade, A.A. (2003). Upper mantle P velocity structure beneath the Baikal Rift from modeling regional seismic data. Geophysical Research Letters 30: doi: 10.1029/2002GL016115. issn: 0094-8276. |
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Uppermost mantle P wave velocity structure beneath the Baikal rift and southern margin of the Siberian Platform has been investigated by using a grid search method to model Pnl waveforms from two moderate earthquakes recorded by station TLY at the southwestern end of Lake Baikal. The results yielded a limited number of successful models which indicate the presence of upper mantle P wave velocities beneath the rift axis and the margin of the platform that are 2--5% lower than expected. The magnitude of the velocity anomalies and their location support the presence of a thermal anomaly that extends laterally beyond the rift proper, possibly created by small-scale convection or a plume-like, thermal upwelling. |
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Abstract |
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Keywords
Seismology, Body wave propagation, Seismology, Continental crust, Tectonophysics, Continental tectonics--extensional |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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