Characteristics,timing,and offsets of the middle-southern segment of the western boundary strike-slip fault of the Songliao Basin in Northeast China  

作　　者：HAN GuoQing LIU YongJiang Franz NEUBAUER Johann GENSER ZOU YunXin LI Wei LIANG ChenYue 

机构地区：[1]College of Earth Sciences,Jilin University,Changchun 130061,China [2]Department Geology and Geography,University of Salzburg,Salzburg A-5020,Austria [3]State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China [4]Inner Mongolia Exploration Institute of Geology and Mineral Resources,Hohhot 010010,China

出　　处：《Science China Earth Sciences》2012年第3期464-475,共12页中国科学（地球科学英文版）

基　　金：supported by National Natural Science Foundation of China (Grant No. 40739905);Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 200801830041);Science and Technology Project of Sinopec (Grant No. G0800-06-ZS-327);China Scholarship Council (Grant No. 2008617114);the Opening Foundation of the State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration

摘　　要：As the west boundary fault of the Songliao Basin and the eastern margin of the Da Hinggan Mountains, the Nenjiang-Balihan fault is located in the central part of Northeast China. It is traditionally considered to be a huge deep-seated NNE-striking fault, characterized by a normal fault or detachment fault displacement. The field investigation resulted in the finding of ductile shear zones in the Lingxia and Louzidian areas, the middle and southern sectors of the fault system. The authors conducted meas- urements of structural elements in the field, micro-structural studies, finite strain measurements, a study on preferred crystal orientations of quartz determined by Electron Back Scatter Diffraction and muscovite 40Ar/9Ar chronology of the deformed rocks in the ductile shear zone. The results show that the deformation features of the Lingxia and Louzidian ductile shear zones are similar, and that they represent one continuous fault, i.e., the middle-southern segment of the Nenjiang-Balihan Fault, which experienced a sinistral strike-slip ductile shearing in the Early Cretaceous （-130 Ma）. By measuring the displacement of the Xar Moron River suture and Wolegen Group on both sides of the Nenjiang-Balihan Fault, it is found that the cumulative strike-slip offset of the fault is about 40-50 km.作为 Songliao 盆和 Da Hinggan 山的东方边缘的西方边界差错， Nenjiang-Balihan 差错位于东北中国的中央部分。是一个巨大的深层的 NNE 惹人注目的差错传统地被认为，由一个正常差错或分开差错排水量描绘了。域调查导致了发现可锻砍在 Lingxia 和 Louzidian 区域，中间和差错系统的南部的扇区的地区。作者在这个领域里进行了结构的元素的大小，微结构研究，有限紧张大小，石英的比较喜欢的水晶取向上的研究用电子背决定了散布使变形的岩石的衍射和白云母 40Ar/39Ar 年表在可锻砍地区。变丑 Lingxia 和 Louzidian 展示的结果表演可锻砍地区是类似的，并且他们代表一个连续差错，即， Nenjiang-Balihan 的中间南部的片断指责在早白垩纪(130 妈) 的可锻的砍，它经历了左首的罢工滑倒。由在 Nenjiang-Balihan 差错的双方上测量 Xar 蠢人河缝术和 Wolegen 组的排水量，差错的累积罢工滑倒偏移量是大约 4050 km，这被发现。

关 键 词：western boundary fault of Songliao Basin sinistral strike-slip offset 40Ar/9Ar dating 

分 类 号：P618.130.2[天文地球—矿床学] P544.4[天文地球—地质学]