昌宁-孟连带中段干龙塘构造混杂岩的发现  

THE DISCOVERY OF GANLONGTANG TECTONIC MELANGE IN THE MIDDLE SECTION OF CHANGNING-MENGLIAN ZONE

作　　者：段向东[1] 李静 曾文涛 冯文杰 

机构地区：[1]昆明理工大学,昆明650000 [2]云南省地调院区域地质调查所,云南玉溪653100

出　　处：《云南地质》2006年第1期53-62,共10页Yunnan Geology

基　　金：中国地质调查局区域地质调查项目1:25万临沧县幅;滚龙幅区域地质调查成果

摘　　要：干龙塘构造混杂岩带，总体上南北向展布，北与风庆铜厂街蛇绿岩套相接，南与牛井山蛇绿岩带及双江粟义带相接。由三亚带组成，各地质体间均由规模不等的逆冲断层或韧性剪切带分割。绿片岩中发现较多蓝闪石高压变质矿物；干龙塘剖面角闪绿泥片岩中获330～348Ma的同位素年龄。该带可能代表了古特提斯洋缝合线的位置。The Ganlongtang tectonic melange zone is extended generally in SN direction, contact with the ophiolite suite in the north and with the Niujingshan ophiolite zone and the Shuangjiang - Suyi zone in the south, which are composed of 3 sub - zones. The geological bodies are separated by the thrust or ductile shear zone of different scale. glaucophanes have been discovered in the green schist. A lot of high pressure metamorphic mineral The isotopic age of amphibole chlorite schist in Ganlongtang section is 330 -348 Ma. Perhaps this zone is a representative of the Tethys suture.

关 键 词：古特提斯缝合 蓝闪石 构造混杂岩带 昌宁-孟连带 干龙塘耿马云南 

分 类 号：P542[天文地球—构造地质学] P588.14[天文地球—地质学]