从亚洲S波波速结构看地幔流体运动特征
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Movement Features of Mantle Fluid Flows from S-wave velocity Structure of Asia
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    摘要:

    总结S波速度成像研究的成果,在对全球地幔对流模式分析对比的基础上,考察了亚洲地区地幔S波速结构的总体特征以及地幔流体运动的模式。认为上地幔S波速结构的总体特征总体上可以用板块构造学说来解释,亚欧超级大陆中心区地幔中有地热能量积累。海南下方地幔S波速度负异常可能反映现代地幔热羽柱,地幔热流体的运动由由下向上及倾向两种模式。两种模式可以互相穿接,具有同等的重要性。

    Abstract:

    Based on recent results of S-wave seismic tomography, we analyze of overall features of the mantle S-wave velocity structures beneath Asia, which correlate with the current movement pattern of mantle heat-flows. The study concludes that the S-wave velocity structure features of the Upper Mantle can be explained by the plate tectonics. Heat accumulation occurs beneath the lithosphere of the central Eurasia superplate. A strong negative velocity disturbance exists in the mantle below Hainan Island and South China Sea that looks very much like a mantle superplume. The movement of mantle heat-fluid flows shows two different geometrical patterns: vertically growing up or side turning. The flows belonging to these two patterns are equally important and can across into each other to construct more complicate modes.

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杨文采,于常青.2011.从亚洲S波波速结构看地幔流体运动特征[J].地质学报,85(9):1399-1408.
YangWencai, YU Changqing.2011. Movement Features of Mantle Fluid Flows from S-wave velocity Structure of Asia[J]. Acta Geologica Sinica,85(9):1399-1408.

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历史
  • 收稿日期:2010-10-26
  • 最后修改日期:2011-01-05
  • 录用日期:2011-01-06
  • 在线发布日期: 2011-09-07
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