陕渝黔桂1800km超长探测剖面重力异常场特征及深部地壳结构探榷  

Discussion on the gravity anomaly and deep crustal structure of an 1800km long profile crossing Shaanxi,Chongqing,Guizhou and Guangxi

作　　者：王谦身[1] 滕吉文[1,2] 张永谦[1,3] 陈石[4] 文武[1] 皮娇龙[1,4] 马学英[1] WANG Qian-Shen TENG Ji-Wen ZHANG Yong-Qian CHEN Shi WEN Wu PI Jiao-Long MA Xue-Ying(Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China Institute of Geophysics, China Earthquake Administration, Beijing 100081, China)

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]吉林大学地球探测科学与技术学院,长春130026 [3]中国地质科学院矿产资源研究所,北京100037 [4]中国地震局地球物理研究所,北京100081

出　　处：《地球物理学报》2016年第11期4139-4152,共14页Chinese Journal of Geophysics

基　　金：扬子克拉通壳幔结构与深层动力过程(41674102)资助

摘　　要：通过对跨越华北克拉通、秦岭造山带、扬子克拉通几大地质构造单元的,北起陕西榆林经秦岭过重庆鱼泉、贵州贵阳并向南到广西凭祥全长1810km超长重力探测剖面的数据进行处理分析和解释,构建了沿剖面的二维地壳密度结构模型,并详细分析了沿剖面壳内各界面与Moho界面展布的深部结构和构造特征、构划出了该剖面的深部断裂分布,探讨了剖面辖区跨越的克拉通、造山带、接触带或耦合带等一系列的区域构造的差异,同时对其可能的地质构造含义进行初步了解释,以期能对深化认识该剖面跨越地区的地壳结构、构造单元划分及动力学等研究,提供相关重力场的依据.An 1800 km long gravity profile was conducted from Yulin city in Shaanxi province to Pingxiang city in Guangxi province and crossed North China Craton,Qinling Orogen,and Yangtze Craton.By processing and analyzing the data,we constructed the 2D crustal density model and discussed the deep structure,tectonics and faults along the profile.In addition,we discussed the differences between craton,orogen and their coupling belt and interpreted the geological implications of the deep structure along this profile.Our research results can provide evidences in the viewpoint of gravity field to the further study of the crustal structure,tectonicunits and geodynamics in this region.

关 键 词：陕—渝—黔—桂 重力异常场 地壳密度结构 

分 类 号：P315[天文地球—地震学]