粘土断层泥的热-孔隙-力学特性及其在断层快速剪切中的应用
Thermo-Poro-Mechanical Properties of Clayey Gouge and Application to Rapid Fault Shearing
摘要：
本文在对希腊科林斯湾活动地震带Aigion断层760 m深处粘土泥的热-孔隙-力学行为进行全面表征的基础上，分析了快速滑动事件中断层增压的机制。结果表明，这种粘土泥的热塌陷字符可以负责有效应力的显着减少和充分流化的材料。高度应变材料的“超局部化”区域的厚度是控制孔隙压力增加导致断层泥流化和温度增加导致孔隙流体蒸发的竞争现象的关键参数。
英文摘要：
In this paper, the mechanism of fault pressurization in rapid slip events is analyzed on the basis of a complete characterization of the thermo-poro-mechanical behavior of a clayey gouge extracted at 760m depth in Aigion fault in the active seismic zone of the Gulf of Corinth, Greece. It is shown that the thermally collapsible character of this clayey gouge can be responsible for a dramatic reduction of effective stress and a full fluidization of the material. The thickness of the 'ultra localized' zone of highly strained material is a key parameter that controls the competing phenomena of pore pressure increase leading to fluidization of the fault gouge and temperature increase leading to pore fluid vaporization.
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