Seismic anisotropy and mantle flow beneath the Baikal rift zone

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doi: 10.1038/371149a0
Authors:Gao, S.; Davis, P. M.; Liu, H.; Slack, P. D.; Zorin, Y. A.; Mordvinova, V. V.; Kozhevnikov, V. M.; Meyer, R. P.
Author Affiliations:Primary:
University of California, Department of Earth and Space Sciences, Los Angeles, CA, United States
Other:
Russian Academy of Sciences, Russian Federation
University of Wisconsin, United States
Volume Title:Nature (London)
Source:Nature (London), 371(6493), p.149-151. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:1994
Note:In English. 28 refs.; illus., incl. 2 tables, sketch maps
Summary:Results are presented from an array of seismic stations across the Baikal rift zone in S Siberia. The splitting in arrival times of SKS seismic waves indicates that the upper mantle beneath the rift zone is anisotropic with the fast direction (reflecting that of mantle flow) being horizontal and normal to the rift axis. The broad upwarp associated with this continental rifting may be caused by mantle flow similar to that at mid-ocean rifts. The anisotropy around Lake Baikal is the result of uppermost mantle flow associated with recent tectonics. [R.K.H.]
Subjects:Anisotropy; Asthenosphere; Body waves; Elastic waves; Mantle; Nesosilicates; Olivine; Olivine group; Orthosilicates; Plate tectonics; Preferred orientation; Rift zones; Rifting; Seismic waves; Silicates; SKS-waves; Upwelling; Velocity structure; Wave splitting; Asia; Baikal rift zone; Commonwealth of Independent States; Russian Federation; Siberia
Abstract Numbers:95M/1136
Record ID:1995024717
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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