Crustal deformation in Thailand and tectonics of Indochina peninsula as seen from GPS observations
Crustal deformation in Thailand and tectonics of Indochina peninsula as seen from GPS observations
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DOI：
10.1029/2004gl020347
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发表时间：
2004-06
影响因子：
5.2
通讯作者：
M. Iwakuni;T. Kato;H. Takiguchi;T. Nakaegawa;M. Satomura
中科院分区：
文献类型：
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作者：
M. Iwakuni;T. Kato;H. Takiguchi;T. Nakaegawa;M. Satomura
印度支那半岛一直被假设为在巽他地块，刚性块在东南亚。但其北方边界并不明显。为了阐明半岛的边界和变形，在泰国建立了六个永久性的全球定位系统站点，自1998年3月以来进行了观测。估计的速度表明，大多数的印度支那半岛是刚性的，可以被认为是在巽他地块。然而，仔细研究表明，泰国存在10−8量级的小但重要的菌株。统计检验表明，巽他地块与华南地块之间不存在明显的差异运动。另一方面，东喜马拉雅构造带的急顺时针旋转表明泰国北部存在左旋剪切，这可能部分是由Mae Chan断层沿着左旋运动所调节的。
The Indochina peninsula has been hypothesized to be in the Sunda block, a rigid block in SE Asia. However, its northern boundary is not obvious. To elucidate the boundary and the deformation on the peninsula, six permanent GPS sites were established in Thailand, and observations have been conducted since March 1998. Estimated velocities suggest that most of the Indochina peninsula is rigid and can be considered in the Sunda block. However, close examination suggest small but significant strain in the order of 10−8 exists in Thailand. Statistical test suggests that there is no significant differential motion between the Sunda block and the South China block. On the other hand, acute clockwise rotation of east Himalayan syntax indicates left lateral shear in the north of Thailand, which may be partially accommodated by left lateral motion along Mae Chan fault.