阴山山系与鄂尔多斯盆地北部的重力场与深部构造  

Gravity field and deep crustal structures of the Yinshan orogen and the northern Ordos basin

作　　者：王谦身[1] 滕吉文[1] 安玉林[2] 张永谦[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国地质大学,北京100083

出　　处：《地球物理学进展》2010年第5期1590-1598,共9页Progress in Geophysics

基　　金：国家自然科学重点基金项目(40434009)资助

摘　　要：阴山山系与鄂尔多斯盆地跨越不同的构造单元,是典型的盆、山耦合地带,且是构造活动强、弱的变异地域,了解该区地壳深部结构对与理解和认识盆山耦合地区的深部要素和深层动力学过程具有重要意义.本文基于最新采集的高精度重力探测数据,通过重力正、反演拟合求得了延川—包头—满都拉剖面辖区的地壳密度结构,并结合已有的面积性区域重力探测数据反演了该区的Moho界面分布特征.在此基础上系统地讨论了该区的深部地壳密度结构特征,为进一步深化认识该区的深部构造及其动力学过程提供了重力学方面的重要信息.The Yinshan orogen and the northern Ordos basin cross different tectonic units in China. It is not only a coupling belt of basins and mountains, but also a special area with strong and weak tectonic activities. So it is of great important to know and understand the deep properties and deep geodynamical process in this area. In this paper, we determine the crustal density structure based on the latest gravity data along the Yanchuan-Baotou-Mandula profile, and analyze the crustal density structure of this area coupling with the Moho depth distribution characteristics from areal gravity data. They can provide important gravity and density information for the research on deep structares and geodynamical process in this area.

关 键 词：阴山山系 鄂尔多斯 布格重力异常 密度结构 Moho界面 

分 类 号：P315[天文地球—地震学]