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) |
|---|---|
| Pages (from-to) | 2-1 - 2-4 |
| Journal | Geophysical Research Letters |
| Volume | 30 |
| Issue number | 4 |
| DOIs | |
| State | Published - Feb 15 2003 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Geophysics
- Earth and Planetary Sciences(all)
Cite this
}
Upper mantle P velocity structure beneath the Baikal Rift from modeling regional seismic data. / Brazier, Richard A.; Nyblade, Andrew A.
In: Geophysical Research Letters, Vol. 30, No. 4, 15.02.2003, p. 2-1 - 2-4.Research output: Contribution to journal › Article
TY - JOUR
T1 - Upper mantle P velocity structure beneath the Baikal Rift from modeling regional seismic data
AU - Brazier, Richard A.
AU - Nyblade, Andrew A.
PY - 2003/2/15
Y1 - 2003/2/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0038504835&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038504835&partnerID=8YFLogxK
U2 - 10.1029/2002GL016115
DO - 10.1029/2002GL016115
M3 - Article
AN - SCOPUS:0038504835
VL - 30
SP - 2-1 - 2-4
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 4
ER -