元谋‒昔格达断裂及其附近上新世以来的构造应力场特征及地貌响应  

Characteristics of the Late Cenozoic Tectonic Stress Field in the Yuanmou-Xigeda Fault Zone and its Vicinity and Their Geomorphological Responses

作　　者：卢海峰 张伟松[4] 张进忠 LU Haifeng;ZHANG Weisong;ZHANG Jinzhong(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;Key Laboratory of Active Tectonics and Geological Safety,Ministry of Natural Resources,Beijing 100081,China;Research Center of Neotectonism and Crustal Stability,China Geological Survey,Beijing 100081,China;Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China;The 5th Geology and Mineral Resources Survey Institute,Tai’an 271000,Shandong,China)

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]自然资源部活动构造与地质安全重点实验室,北京100081 [3]中国地质调查局新构造与地壳稳定性研究中心,北京100081 [4]中国地震局地壳应力研究所,北京100085 [5]山东省第五地质矿产勘查院,山东泰安271000

出　　处：《大地构造与成矿学》2022年第2期202-216,共15页Geotectonica et Metallogenia

基　　金：国家自然科学基金项目(41002074);中央级公益性科研院所基本科研业务专项(ZDJ2017-24);中国地质调查局项目(DD20190018)联合资助。

摘　　要：基于传统的古构造应力场重建方法,依据元谋‒昔格达断裂及其附近的构造形迹,恢复了区域构造应力场。结果表明,研究区自上新世以来,主要受早期(中更新世之前)的NNE-SSW向和晚期(中更新世以来)的NNW-NWW向水平主压应力作用;而江边‒下雷弄、化同‒秧田井、一平浪‒罗川一带的元谋‒昔格达断裂晚第四纪倾滑特征与相应段落处的局部构造应力场密切相关,反映了构造应力场对断裂的活动性质具有重要的影响和调整作用。结合该构造第四纪活动方式和区域构造应力场变化,粗略勾画出研究区及其邻区的新生代晚期动力学模型。By using conventional paleo-tectonic stress field reconstruction method,we depicted the regional tectonic stress field according to the structural features of the Yuanmou-Xigeda fault zone and its vicinity.The results show that during the late Cenozoic,the study area was mainly affected by the horizontal principal compressive stress of NNE-SSW direction before the middle Pleistocene,and NNW-NWW direction since the middle Pleistocene.While the dip-slip characteristics of the Yuanmou-Xigeda fault zone during the Late Quaternary exhibited in the Jiangbian-Xialeinong,Huatong-Yangtianjing,Yipinglang-Luochuan areas are closely related to the local tectonic stress field of the corresponding sections,which reflects that the tectonic stress field has an important influence and adjustment effect on the activity properties of the fault zone.Combined with the Quaternary activity pattern and regional tectonic stress field changes of the Yuanmou-Xigeda fault zone,we propose a Late Cenozoic dynamic model for the study area and its adjacent areas.

关 键 词：元谋‒昔格达断裂及其附近 古构造应力场重建 构造形迹 局部构造应力场 动力学模型 

分 类 号：P542[天文地球—构造地质学]