Koyna earthquakes: a review of the mechanisms of reservoir-triggered seismicity and slip tendency analysis of subsurface faults
Koyna earthquakes: a review of the mechanisms of reservoir-triggered seismicity and slip tendency analysis of subsurface faults
复制标题
科伊纳地震：水库触发地震活动机制综述和地下断层滑动趋势分析
DOI：
10.1007/s11600-020-00457-6
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发表时间：
2020
期刊：
影响因子：
2.3
通讯作者：
J. Mallik
中科院分区：
文献类型：
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作者：
Dip Das;J. Mallik
印度西部的科伊纳地区在过去的50年中经历了10多万次不同震级（M ~ 1.0-6.3）的地震。据信，该地区的地震是由于水库（Koyna和Warna水库）的水渗透到地下而引起的流体压力变化引发的。印度地球科学部和国际大陆科学钻探计划（ICDP）制定了一项钻探计划，以研究深层地下岩性、结构、热属性等，因为该地区被厚约950米的德干玄武岩覆盖。本文回顾了前人提出的水库触发地震机制假说，并将其归纳为一个简单的一般模型。在此基础上，进一步分析了断层滑动趋势与断层几何形状、岩石力学性质、应力和流体梯度的关系。最后，在不同深度的故障的特点（有利的方向，不利的方向和严重错误的方向）的基础上，他们的潜在走向失败。
Koyna region in western India experienced more than 1,00,000 earthquakes of different magnitudes ( M ~ 1.0–6.3) in the past five decades. Earthquakes in this region are believed to be triggered by a change in fluid pressure due to the percolation of the reservoir (Koyna and Warna reservoir) water into the subsurface. A drilling program was set up by the Ministry of Earth Sciences, India and International Continental Scientific Drilling Program (ICDP) to study the deep subsurface lithology, structure, thermal attributes, etc. as the area is covered by ~ 950 m of thick Deccan basalts. This paper reviews all the hypotheses proposed by earlier workers to explain the mechanism of reservoir trigger causing earthquakes and summarizes such theories to a simple generic model. Slip tendency analysis was further carried out based on the proposed model to explain the dependence of fault slip on fault geometry, rock mechanical properties, stress and fluid gradients. Finally, faults at various depths were characterized (favourably oriented, unfavourably oriented and severely misoriented) based on their potential to go into failure.
DOI：
10.1029/2019gc008437
发表时间：
2019
期刊：
Geosystems
影响因子：
--
作者：
Williams, C. D.;Mukhopadhyay, S.;Rudolph, M. L.;Romanowicz, B.
通讯作者：
Romanowicz, B.