Seismotectonics of subduction and back-arc rifting under the Andaman Sea
Seismotectonics of subduction and back-arc rifting under the Andaman Sea
复制标题
安达曼海俯冲和弧后裂谷的地震构造
DOI：
10.1016/0040-1951(84)90237-3
复制
发表时间：
1984
期刊：
影响因子：
--
通讯作者：
M. Mukhopadhyay
中科院分区：
文献类型：
--
作者：
M. Mukhopadhyay
印度板块在缅甸板块之下的活动性下冲作用在安达曼和缅甸弧之下产生了地震活动。这表明，存在显着差异的配置Benioff区的两个弧。安达曼弧的震中分布勾勒出几条平行的、线性延伸的断裂带。安达曼弧后扩张脊是由安达曼海北部和南部分别呈北北东向和南东向的一条相对狭窄的浅地震带所界定的。扩张脊被活动转换断层所抵消。在遥远的北方，扩张的山脊似乎连接到缅甸海岸的一个主要转换断层。震源机制研究提供了安达曼海槽内壁附近张应力、缅甸板块上覆压偏应力和弧后扩张脊下张应力的证据。
Active underthrusting of the Indian plate below the Burma plate produces seismic activity under the Andaman and Burmese arcs. It is suggested that significant differences exist in the configuration of the Benioff zone underlying the two arcs. Several parallel and linearly extensive fault zones are outlined by epicentral distribution in the Andaman arc. The Andaman back-arc spreading ridge is defined by a relatively narrow shallow seismic zone that orients NNE to SSE in north and south parts of the Andaman Sea respectively. The spreading ridge is offset by active transform faults. On the far north the spreading ridge appears to connect to a major transform fault in Burma across the Burmese coast. Focal mechanism study provides evidence for tensional stress near the inner wall of the Andaman trench, dominant compressive deviatoric stress within the overriding Burma plate, and tensional stress under the back-arc spreading ridge.