Abstract
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.
Original language | English (US) |
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Pages (from-to) | 2-1 - 2-4 |
Journal | Geophysical Research Letters |
Volume | 30 |
Issue number | 4 |
DOIs | |
State | Published - Feb 15 2003 |
All Science Journal Classification (ASJC) codes
- Geophysics
- Earth and Planetary Sciences(all)