北澜沧江带的性质--是冈瓦纳板块与扬子板块的界线吗？  

The North Lancangjiang suture: the boundary between Gondwana and Yangtze?

作　　者：李才[1] 谢尧武 董永胜[1] 徐锋[1] 强巴扎西 蒋光武 

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]西藏地勘局区域地质调查大队．西藏堆龙德庆851400

出　　处：《地质通报》2009年第12期1711-1719,共9页Geological Bulletin of China

基　　金：国家自然科学基金项目(编号:40872146、40672147);中国地质调查局项目(编号:1212010818015、1212010510214)资助

摘　　要：藏东地区冈瓦纳板块与扬子板块的界线是不能回避的关键问题。借助前人已有的区域地质资料和研究成果,对北澜沧江带两侧的基底岩系、古生代沉积建造、地层古生物、火山岩浆弧、变质岩、变质作用、高压变质带、吉塘岩群、酉西群、构造运动分期等进行剖析,并与邻区进行了简单对比。在此基础上初步得出北澜沧江带是藏东地区连接滇西澜沧江缝合带与龙木错-双湖缝合带的纽带,是藏东地区冈瓦纳板块与扬子板块界线的倾向性意见,还有待于深入研究的验证。It is a significant issue that where is the boundary of Gondwana and Yangtze plate in eastern Tibet. In this.paper, based on previous research achievements, we reviewed all the aspects including basement rocks, Paleozoic sedimentary formation, stratigraphy and paleontology, volcanic magmatic arc, metamorphic rocks, high pressure metamorphic belt, Jitang Group, Youxi Group and multi-phase tectonic activities. Our conclusion is that North Lancangjiang suture zone should be a connection point between South Lancangjiang suture in eastern Yunnan and Longmucuo-Shuanghu suture zone. However, we still need to verify it through further research work.

关 键 词：青藏高原 北澜沧江带 冈瓦纳板块 扬子板块 界线 

分 类 号：P542.4[天文地球—构造地质学]