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首页> 外文期刊>Journal of geodynamics >An appraisal of crustal structure of the Indo-Burmese subduction region
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An appraisal of crustal structure of the Indo-Burmese subduction region

机译：印度缅甸划分区域的地壳结构评估

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摘要

We analyzed teleseismic receiver functions of 9 sites to determine the crustal structure beneath the Indo-Burmese subduction region (IBR), which is seismically one of the most active subduction zones of the Indian subcontinent. The receiver function analysis of the primary and reverberated phases allowed us to image the down going Moho beneath the Burmese micro plate parallel to the subducting slab. We observed that this subduction zone is characterized by sharp dip of a thick ((similar to)45 km) crust in the Indian Territory, which steeply bends down to (similar to)57 km in the Burmese Territory separated by the Churachandpur Mao Fault (CMF). The Imphal valley, located in the central part of the IBR, has a sedimentary thickness of 2.5 km. The Poisson's ratio values correlate well with the tectonic units comprises the subduction region. We observed high Poisson's ratio values throughout the region, which reflects bulk mafic to ultramafic crustal composition. Our observations of Poisson's ratio beneath the IBR reveal that the Indian crust along the IBR is oceanic in nature, which is possibly the Tethyan oceanic crust of Southeast Asia.
机译：我们分析了9个站点的Telesis Ismicic接收器功能，以确定印度围绕印度次大陆最具活跃的俯冲区域之下的地壳结构。主要和混响阶段的接收器功能分析使我们能够将缅甸微型板下方的下降的MOHO图像平行于底板板。我们观察到这种俯冲区域的特点是在印度领土上厚度（（类似）45公里）外壳的尖锐倾斜，这在被Churachdandpur Mao故障分开的缅甸领地57公里（类似）（ CMF）。位于IBR的中央部分的Imphal谷，沉积厚度为2.5公里。泊松的比率值与构造单元相关良好，包括俯冲区域。我们观察到整个地区的高泊松比值，这反映了批量抹布到超微的地壳组合物。我们对IBR下面的泊松比例的观察表明，IBR的印度地壳是海洋性质，这可能是东南亚的Tethyan海洋地壳。

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