摘要
以昔格达断裂带(晚)新生代昔格达组地层内发育的节理、断面等构造形迹为研究对象,通过节理玫瑰花图、节理等密度图及吴氏赤平投影等方法,反演研究区(晚)新生代的构造应力场特点。结果表明,自(晚)新生代以来,昔格达断裂带拉鲊-新久段(晚)区域主要受早期的NNE-SSW向构造挤压和晚期的NWW-SEE向挤压作用,且晚期断裂活动性质以走滑兼正断为主,并逐步确定了现在的构造形迹、地貌特征。
In this article,we measure the tensional fracture,shear joints,and the faults developed in the Xigeda formation during the late Cenozoic.Then,we project the measurements into Wulff net with lower hemisphere,and make a rose diagram of joint and tensional fracture.The results show that horizontal principal stress is in the NNE-SSW direction during the early period and horizontal principal stress is in the NWW-SEE direction during the late period.The late stage faults are mainly strike and normal,gradually determining the structural features and landform.
出处
《大地测量与地球动力学》
CSCD
北大核心
2017年第10期1010-1014,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41002074)
中国地震活断层探察--南北地震带中南段项目(201108001)~~
关键词
昔格达断裂带
节理
构造地貌
构造应力场
Xigeda fault zone
joint
structural geomorphology
tectonic stress field
