Variations of seismic velocities in the Kachchh rift zone, Gujarat, India, during 2001-2013
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- 作者：Prantik Mandal ; prantik@ngri.res.in" class="auth_mail" title="E-mail the corresponding author
- 关键词：Tomography ; Temporal changes ; Intraplate seismicity ; Kachchh rift zone ; Aftershocks
- 刊名：Tectonophysics
- 出版年：2016
- 出版时间：16 March 2016
- 年：2016
- 卷：672-673
- 期：Complete
- 页码：68-86
- 全文大小：5223 K
文摘
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we present 3-D seismic images of the crust below the Kachchh rift zone, india
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A decrease in seismic velocities in the rupture zone during 2001-10
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A slight increase in seismic velocities in the rupture zone during 2011-13
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Decrease in velocities is attributed to elevated pore fluid pressure
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Recovery of velocities is attributed to crack healing
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Imaged several deeper zones of reduced seismic velocities
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These zones are inferred to be filled with metamorphic fluids / volatile CO2
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Deeper fluid circulation is shown to generate episodic seismic activity