Current Stress Pattern and Geodynamics of the Baikal Rift System

被引：3

作者：

Rebetsky, Yu. L. ^{[1
]}

Dobrynina, A. A. ^{[2
,3
]}

San'kov, V. A. ^{[2
]}

机构：

[1] Russian Acad Sci, Shmidt Inst Phys Earth, Ul Bol Gruzinskaya 10,Bld 1, Moscow 123995, Russia

[2] Siberian Branch, Inst EarthsCrust, Russian Acad Sci, Ul Lermontova 128, Irkutsk 664033, Russia

[3] Russian Acad Sci, Geol Inst, Siberian Branch, Ul Sakhyanovoi 6a, Ulan Ude 670047, Russia

来源：

RUSSIAN GEOLOGY AND GEOPHYSICS | 2023年 / 64卷 / 01期

关键词：

stress; earthquake; tectonophysics; earthquake focal mechanism; fault; geodynamics; EARTHS CRUST; SEISMOTECTONIC DEFORMATIONS; EARTHQUAKE SEQUENCE; POSSIBLE MECHANISM; FOCAL MECHANISMS; CENTRAL-ASIA; UPPER-MANTLE; FIELD; STATE; ZONE;

D O I：

10.2113/RGG20214367

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The crustal stress field of the Baikal Rift System has been reconstructed by tectonophysical inversion of focal mechanisms from the catalog of earthquakes recorded by the regional seismological network. Cataclastic analysis of fault slip data developed at the Shmidt Institute of the Physics of the Earth (Moscow) revealed previously unknown features in the behavior of principal stresses. Namely, the maximum deviatoric stresses diverge off the rift axis while the normalized spherical and deviatoric stress tensor components reach high magnitudes in the crust of the Baikal Basin. The obtained stress pattern of the Baikal Rift System is consistent with the rift origin by a joint action of a vertical mantle flow (upwelling branch of convection) and a horizontal flow in the asthenosphere which drives the NW-SE mo-tion of the Amur plate off Eurasia.

引用

页码：75 / 92

页数：18

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