Effects of phyllosilicate minerals on fault slip of sandstone

本研究的目的是阐明层状硅酸盐矿物，如蒙脱石，伊利石，蒙脱石断层滑动行为的砂岩从喜马拉雅前缘逆冲岩片的作用。这项研究将提供有关大陆碰撞带（如喜马拉雅山）以及增生复合体（如日本群岛）地壳浅层（<10公里）断层运动的见解，因为砂岩是大陆碰撞带和增生复合体的主要岩石。利用安装在Kochi岩心中心（JAMSTEC）的旋转剪切仪，对喜马拉雅山西北部纳汉逆冲断层的砂岩粉和泥进行了15 MPa正应力、5 MPa孔隙水压力和蠕变-地震滑动速度条件下的变形实验。

This research aims to elucidate the role of layered silicate minerals like chlorite, illite, and smectite on fault-slip behavior of sandstone from within the Himalayan Frontal Thrust Sheet. The study will provide insights on fault movement at shallow crustal depths (<10 km) from continental collisional zones (like Himalayas) as well as accretionary complexes (such as Japanese Islands), because sandstone is a major rock in both the continental collisional zones and accretionary complexes. Rotary shear apparatus installed at Kochi Core Center (JAMSTEC) was used for performing the deformation experiments at 15 MPa normal stress, 5 MPa pore water pressure, and creep to seismic slip velocities on the sandstone powders and gouges from the Nahan Thrust of the north-west Himalayas.