Effects of phyllosilicate minerals on fault slip of sandstone

这项研究旨在阐明绿泥石、伊利石和蒙皂石等层状硅酸盐矿物对喜马拉雅前缘冲断片内砂岩断层滑动行为的作用。这项研究将对大陆碰撞带(如喜马拉雅山脉)和增生杂岩(如日本群岛)地壳浅层(&lt；10公里)的断层运动提供见解，因为砂岩是大陆碰撞带和增生杂岩中的主要岩石。使用安装在高知岩心中心的旋转剪切仪(JAMSTEC)，对喜马拉雅西北部纳罕逆冲的砂岩粉和断层泥进行了15 Mpa的正应力、5 Mpa的孔压和蠕变到地震滑动速度的变形实验。

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.