万秀红^1,,
屠泓为^1,,,
李智敏¹,
罗国富²
1. 青海省地震局, 西宁 810001
2. 宁夏回族自治区地震局, 银川 750001

基金项目: 青海省重大科技专项（2019-ZJ-A10），青海省地震局基金课题（2019B04），中国地震局星火计划（XH16039）及择优计划项目（[2016]384）联合资助


详细信息

作者简介: 万秀红, 女, 1983年出生, 工程师, 主要从事地震活动性和地震工程研究.E-mail:xhwan666666@163.com

通讯作者: 屠泓为, 男, 1977年出生, 副研究员, 主要从事地震预测预报及地下位错反演研究.E-mail:tuhongwei33@sina.com

中图分类号: P313

收稿日期:2018-09-18
修回日期:2019-08-20
上线日期:2019-12-05

Characteristics and its structural significance of space stress field in Hindu Kush and adjacent areas

WAN XiuHong^1,,
TU HongWei^1,,,
LI ZhiMin¹,
LUO GuoFu²
1. Earthquake Agency of Qinghai Province, Xining 810001, China
2. Earthquake Agency of NinxiaHuiAotonomous Region, Yinchuan 750001, China


More Information

Corresponding author: TU HongWei,E-mail:tuhongwei33@sina.com

MSC: P313

--> Received Date: 18 September 2018
Revised Date: 20 August 2019
Available Online: 05 December 2019


摘要
摘要:兴都库什及邻近区域地处印度洋板块和欧亚板块碰撞带的西缘，是大陆内部中源地震最为活跃的区域，各种数据均显示出该区域有着十分特殊的现象.本文从地质构造、地震分布特征、震源机制解、应力场等方面进行初步分析.结果表明，不同的深度应力场方向表现各不相同，不同的区域震源机制特征各异，尤其是正断层性质地震在北东向表现出了线性展布.通过构造模拟认为该区域可能是在地壳的碰撞、推挤、俯冲作用下出现的褶皱，由于地层倒转嵌入，从而形成了多层位地震密集现象.同时在推挤、拖曳的过程中形成了一条深度约100 km以下的北东向的拉张性破裂.
关键词: 兴都库什/
中源地震/
空间应力场/
构造意义

Abstract:Hindu Kush and its adjacent area are located on the western edge of the collision zone between the Indian Ocean plate and the Eurasian plate, which is the most active area of the mid-source earthquake in the mainland.All kinds of data show that the region has a very special phenomenon.Based on the preliminary analysis of geological structure, seismic distribution characteristics, seismic mechanism solution, stress field and so on, the results show that the performance of stress fields directions is different with the change of depth, different regional seismic mechanisms have different characteristics, and in particular, the earthquake with positive fault properties shows a linear spread in the north-east direction.Through structural simulation, it is believed that the fold may be formed under the influence of collision, push, and subduction of the crust in the area, and the phenomenon of a multi-layer seismic intensity has been formed because the strata are reversed and embedded.At the same time, a northeastward tensile rupture under 100 km depth was formed in the process of pushing and dragging.
Key words:Hindu Kush/
Mid-source earthquake/
Space stress field/
Constructive meaning



PDF全文下载地址:

http://www.geophy.cn/data/article/export-pdf?id=dqwlxb_15264