Late Proterozoic Colisional Orogen and Geosuture in Southeastern China:Petrological Evidence  

作　　者：周新民 朱云鹤 

机构地区：[1]Department of Earth Sciences,Nanjing University,Nanjing,210008

出　　处：《Chinese Journal Of Geochemistry》1993年第3期239-251,共13页中国地球化学学报

摘　　要：The Jiangshan-Shaoxing fracture belt(JSFB)is a Late Proterozoic geosuture due to island arc-continent collision in South China,The Cathaysian Block(CT),lying on the southeast side of JSFB,is composed of green schist-amphibolite complexes in the form of a series of tectonic flakes. On the northwest side of JSFB,which is located in the border area of Zheijiang,Jiangxi and Ahhhi provinces(abbreviated as ZJP-JXP-AHP),are distrbuted and ophiolite suite and other rocks,constituting the Jiangnan ancient island arc(JN)on the southeast margin of the Yangtze Block(YZ).The collision between JN and CT at-0.9Ga ago led to the folding of JN.followed by the intrusion(-0.9-0.8Ga ago)of many dioritic and ultramafic stitching plutons along the fracture belt.As a result,the basic Precambrian tectonic framework of southeastern China was shaped.The Jiangshan-Shaoxing fracture belt(JSFB)is a Late Proterozoic geosuture due to island arc-continent collision in South China.The Cathaysian Block(CT),lying on the southeast side of JSFB,is composed of green schist-amphibolite complexes in the form of a series of tectonic flakes. On the northwest side of JSFB,which is located in the border area of Zhejiang,Jiangxi and Anhhi provinces(abbreviated as ZJP-JXP-AHP),are distributed an ophiolite suite and other rocks, constituting the Jiangnan ancient island arc(JN)on the southeast margin of the Yangtze Block(Y Z).The collision between JN and CT at～0.9Ga ago led to the folding of JN,followed by the intrusion(～0.9-0.8Ga ago)of many dioritic and ultramafic stitching plutons along the fracture belt.As a result,the basic Precambrian tectonic framework of southeastern China was shaped.

关 键 词：地缝合线 碰撞造山带 华夏板块 东南地区 江南地区 

分 类 号：P542.2[天文地球—构造地质学]