Deep structure and origin of the Baikal rift zone

Dapeng Zhao, Jianshe Lei, Tomofumi Inoue, Akira Yamada, Stephen S. Gao

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)

Abstract

P-wave velocity images are determined under the Baikal rift zone in Siberia by using teleseismic tomography. Our results show prominent low-velocity anomalies in the upper mantle under the Baikal rift zone and high-velocity anomalies in the lithosphere under the Siberian craton. The low-velocity anomalies are interpreted as a mantle upwelling (plume) which has played an important role in the initiation and evolution of the Baikal rift zone. The rift formation may be also controlled by other factors such as older (prerift) linear lithosphere structures favorably positioned relative to the upwelling and favorable orientation of the far-field forces caused by the India-Asia collision.

Original languageEnglish
Pages (from-to)681-691
Number of pages11
JournalEarth and Planetary Science Letters
Volume243
Issue number3-4
DOIs
Publication statusPublished - 2006 Mar 30
Externally publishedYes

Keywords

  • Baikal rift zone
  • India-Asia collision
  • Mantle upwelling
  • Plume
  • Teleseismic tomography

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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