在喜马拉雅山脉下面的印度次大陆的成像
Vera Schulte-Pelkum1, Gaspar Monsalve, Anne Sheehan
1Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, Colorado 80309-0399, USA. vera.schulte-pelkum@colorado.edu
Nature
|July 1, 2005
概括
研究人员拍摄了喜马拉雅山脉下方的印度板块的图像,揭示了它的脱落和Moho. 地震异构在脱落层上方发展,而下层地中的高速区域表明生态岩石的形成,影响了西藏高原的动态.
科学领域:
- 地质物理学 地质物理学
- 构造学 构造学 构造学 构造学
- 地震学 地震学
背景情况:
- 印度次大陆的地沉入了喜马拉雅山脉和西藏高原.
- 西藏的地表观测被喜马拉雅地质过程所改变.
- 印度板块在喜马拉雅山脉中的几何结构仍然不太清楚.
研究的目的:
- 为了拍摄喜马拉雅山脉下方的脱落和Moho.
- 了解印度板块拆解过程的几何结构.
- 研究地的特性及其对西藏高原的影响.
主要方法:
- 地震反射造型,以图像地表结构.
- 对地震数据的分析,以确定脱落和Moho.
- 解释地震速度和异构性.
主要成果:
- 获得了喜马拉雅山脉下方的脱落和Moho的直接地震图像.
- 在脱落层上方观察到强烈的地震异构,与剪切过程和地震有关.
- 印度地下部的一个高速区域,表明有生态石,被确定在喜马拉雅山以北.
结论:
- 这项研究提供了前所未有的印度板块的低推力几何图像.
- 地震异构和生态岩石的形成是影响喜马拉雅构造学和西藏高原动态的关键因素.
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