Shear heat model for gouge free dip-slip listric normal faults
Shear heat model for gouge free dip-slip listric normal faults
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DOI：
10.1016/j.marpetgeo.2018.09.004
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发表时间：
2018-12
影响因子：
4.2
通讯作者：
S. Mukherjee;I. Agarwal
中科院分区：
文献类型：
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作者：
S. Mukherjee;I. Agarwal
脆性断裂剪切加热在石油地球科学、构造和地震研究中具有重要意义。本文模拟了圆弧形断层面的铲形正断层中剪切热的时间变化，这是迄今为止尚未做过的。这项工作预计将在构造和石油地球科学方面产生深远的影响，因为铲式断层与油气储量密切相关（例如，Valdiya和Sanwal，2017年）。对于没有断层泥和任何次级断层的断层面，剪切热与上盘块体的质量、上盘和下盘块体之间的摩擦系数以及圆弧半径成正比。随着上盘块体向下滑动并逐渐达到较平缓的断层倾角，剪切加热在时间上增强。
Shear heating due to brittle faulting is important in petroleum geosciences, tectonics and seismic studies. Temporal variation of shear heat in a listric normal fault, with a circular arc-shaped fault plane is simulated in this work, which was not done so far. The work is expected to have a far reaching implication in tectonics and petroleum geosciences since listric faults can be closely associated with hydrocarbon reserves (e.g., Valdiya and Sanwal, 2017). For such a fault plane devoid of gouge and any secondary faulting, shear heat is proportional to the mass of the hanging-wall block, the coefficient of friction acting between the hanging-wall and the footwall block, and radius of the circular arc. Shear heating intensifies temporally as the hanging wall block slides down and reaches progressively gentler fault dip.