Effects of phyllosilicate minerals on fault slip of sandstone

页硅酸盐矿物对砂岩断层滑移的影响

• 批准号: 22K14122
• 负责人: SARKAR DYUTI・PRAKASH
• 金额: $ 3万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K14122/
• 关键词: Fault slip behavior; Fault friction; Main Frontal Thrust; Himalayan Earthquakes; Rotary shear deformation; Creep behavior; 回転せん断変形実験; 変形微細組織; 地震性すべり; クリープ性すべり; 主前縁断層

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.

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。

项目成果

Fault zone architecture and lithology-dependent deformation mechanisms of the Himalayan frontal fold-thrust belt: Insights from the Nahan Thrust, India

喜马拉雅额叶褶皱逆冲带的断层带结构和岩性相关变形机制：印度纳汉逆冲断层的见解

• DOI: 10.1130/b36246.1
• 发表时间: 2022
• 期刊: GSA Bulletin
• 作者: Sarkar Dyuti Prakash;Ando Jun-ichi;Ghosh Gautam;Das Kaushik;Dasgupta Prabir;Tomioka Naotaka
• 通讯作者: Tomioka Naotaka

Frictional properties of sandstone gouges within Himalayan Main Frontal thrust: constraints on seismicity of shallow crustal deformation

喜马拉雅主锋逆冲断层内砂岩泥的摩擦特性：浅地壳变形地震活动的约束

• 发表时间: 2023
• 作者: Sarkar Dyuti Prakash;Hirose Takehiro
• 通讯作者: Hirose Takehiro