印度克拉通前寒武纪地质特征  

Precambrian Geological Characteristics of India Craton

作　　者：罗彦军[1] 马伯永[2] 李尚林[1] 张海迪[1] 成功[3] Luo Yanjun;Ma Boyong;Li Shanglin;Zhang Haidi;Cheng Gong(Xi’an Center of Geological Survey,CGS,Xi’an 710054,China;China Geological Survey,Beijing 100037,China;School of Geosciences and Info-Physics,Central South University,Changsha 410083,China)

机构地区：[1]中国地质调查局西安地质调查中心,西安710054 [2]中国地质调查局,北京100037 [3]中南大学地球科学与信息物理学院,长沙410083

出　　处：《吉林大学学报（地球科学版）》2018年第5期1287-1303,共17页Journal of Jilin University：Earth Science Edition

基　　金：中国地质调查局地质调查项目(DD20160105;1212011120333)~~

摘　　要：印度克拉通位于喜马拉雅山前断裂以南,与欧亚大陆相连,是一独立的地质构造单元,主要由Aravalli微陆块、Bundelkhand微陆块、Singhbhum微陆块、Bastar微陆块、东Dharwar微陆块、西Dharwar微陆块及南部麻粒岩微陆块7个太古宙微陆块与Satpura活动带、东Ghats活动带2个元古宙活动带组成。在前期项目的基础上,通过梳理印度克拉通各个构造单元的地质特征,笔者认为:印度克拉通基底在2.50Ga左右趋于稳定;其主要由TTG片麻岩、花岗岩及不同变质程度的变质岩系组成;元古宙发育的Vindhyan盆地、Chhattisgarh盆地、Cuddapah盆地、Godavari盆地、Indravati盆地及Bhima-Kaladgi盆地浅海相碎屑岩-碳酸盐岩沉积是组成印度克拉通前寒武纪的盖层。The India craton is a separate geotectonic unit,which is located in the south of the Himalayas piedmont fault and presently connected with the Eurasian continent.It is mainly composed of seven Archean micro-continents,including Aravalli,Bundelkhand,Singhbhum,Bastar,Eastern Dharwar,Western Dharwar and the southern granulite,and two Proterozoic mobile belts,Satpura and Eastern Ghats.In this paper we summarize the geological characteristics of the main tectonic units of the India craton based on the latest project research results.The stable configuration of the India craton was largely completed at 2.50 Ga.The India craton metamorphic crystalline basement is mainly composed of TTG gneiss,granite,and metamorphic series.The cover of the India craton is mainly composed of the shallow marine clastic sedimentary rocks and platform carbonate rocks,depositing in the Proterozoic sedimentary basins,such as the Vindhyan,Chhattisgarh,Cuddapah,Godavari,Indravati,and Bhima-Kaladgi basins.

关 键 词：印度克拉通 前寒武纪 基底 盖层 

分 类 号：P56[天文地球—构造地质学] P597.3[天文地球—地质学]