Movement Features of Mantle Fluid Flows based on the S-Wave Velocity Structure of Asia
详细信息
- 责任者：Yang Wencai (State Key Laboratory of Tectonics and Dynamics ; Institute of Geology ; CAGS ; Beijing 100037 ; China) ; Yu Changqing
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(9)
- 关键词：地幔动力学 ; mantle dynamics ; 速度结构 ; velocity structure ; 亚洲 ; Asia
- 页码：p.1399-1408
- 图表：4 illus., 1 table, 25 refs.
- 分类号：0400
- 出版序号：1586
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Based on analysis and comparison of global manle convection model, this paper summarized the research results of S-wave seismic tomography,and investigated the general features of mantle S-wave volicty pattern in Asia and the model of mantle fluid movement. It is generally considered that the S-wave velocity structure features of the Upper Mantle can be explained by the plate tectonics. Heat accumulation may occur in the mantle beneath the central Eurasia superplate. A strong negative velocity disturbance occurs in the mantle below the Hainan Island and South China Sea, reflecting a modern mantle-plume system. Movement of mantle heat-fluid flows shows two different geometrical patterns: upward migration and oblique migration, both of which can happen one after another or alone, and then are of equal importance.