- 责任者：Xiong Xiong (Key Laboratory of Dynamic Geodesy ; Institute of Geodesy and Geophysics ; Chinese Academy of Sciences ; Wuhan 430077 ; China) ; Shan Bin
- 刊名：Chinese Journal of Geophysics
- 出版年：2010
- 卷期：53(7)
- 关键词：地幔对流 ; mantle convection ; 地球动力学 ; geodynamics ; 蒙古 ; Mongolia
- 页码：p.1594-1604
- 图表：5 illus., 54 refs.
- 分类号：0400
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
Based on the equations relating regional isostatic gravity anomalies and small-scale upper mantle convection, the convection flow field beneath the MBRZ and convection-generated stress field were investigated by using the regional isostatic gravity anomalies data. The numerical results exhibit a very complicated pattern of the mantle convection and the generated stress field. The mantle flow and the stress beneath the Siberia Platform and Mongolian fold belt are weak, being consistent with the current inactive tectonics in the regions. A mantle upwelling and extension stress regime is found beneath the Baikal Rift Zone. The magnitude of the extension stress is low (~8 MPa), suggesting that the mantle convection is not the cause responsible for the rifting of the Baikal rift. Mantle upwellings are also found beneath the Hangay Plateau, Altai and Gobi-Altai, leading to extension stress in the regions. The mantle upwellings may be the mechanism responsible for the uplift of the Hangay Plateau, and the dynamic background for defining the western boundary of the Amurian Plate.oft-com:office:office" />