满都拉—卡楚加的长剖面地壳介质密度分布及深部结构特征探榷  

Discussion on the crustal density distribution and deep crustal structure of the super-long profile from Mandula(Inner Mongolia)to Kachujia(Russia)

作　　者：王谦身[1] 滕吉文[1,2] 陈石[3] 文武[1] 徐伟民[3] WANG QianShen;TENG JiWen;CHEN Shi;WEN Wu;XU WeiMin(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 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]中国地震局地球物理研究所,北京100081

出　　处：《地球物理学报》2023年第1期173-182,共10页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(90914012,41674102)资助.

摘　　要：通过对南起中国内蒙古满都拉、向北经蒙古国、直抵北端俄罗斯贝加尔湖北卡楚加全长1320 km长重力剖面的布格重力异常数据进行处理和解析,依其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的地壳底界面(Moho界面)展布的深部构造特征,及剖面辖域内的5个次级局部构造单元的重力异常场、地壳密度结构、界面起伏及断裂构造分布的特征.期望此研究结果能为该剖面跨越的中亚造山带东部地区的地壳结构、各次级构造单元的界域与关联方面的进一步研究提供相关的重力场依据.Using the gravity anomaly dataset of the 1320 km long profile from Mandula(Inner Mongolia)in the south,through Mongolia to the Kachujia(Russia)in the north of Baikal,the 2D crustal density structure model has been constructed in this study.We have analyzed the deep structural features along with the Moho interface of the profile including the gravity anomaly,the crustal density structure,the interface undulation and fault distribution for each tectonic unit.This result can provide the proof of gravity field for the further understanding of the crustal structure of the area across the profile,the boundaries and correlations of tectonic units,and the related continental dynamics.

关 键 词：满都拉—卡楚加 蒙古弧 布格重力异常 地壳密度结构 

分 类 号：P318[天文地球—固体地球物理学]