滇西南澜沧地区东岗变质岩带的变质岩与变质作用  

METAMORPHIC ROCKS AND METAMORPHISMOF THE DONGGANG METAMORPHIC BELT IN THE LANCANG AREA,SOUTHWESTERN YUNNAN

作　　者：刘仕承 张皓程 王瑞[1] LIU Shi-cheng;ZHANG Hao-cheng;WANG Rui(Yunnan Gold Mining Group Co.,LTD.,Kunming 650200)

机构地区：[1]云南黄金矿业集团股份有限公司,云南昆明650200

出　　处：《云南地质》2024年第S01期242-246,共5页Yunnan Geology

基　　金：云南省地质勘查基金项目(D2017002):云南省1∶50000下景张幅(F47E009017)、新营盘幅(F47E010017)、东岗幅(F47E010016)、南北归幅(F47E011016)4幅联测区域地质调查项目。

摘　　要：滇西南澜沧地区东岗变质岩带属昌宁-孟连变质岩带或铜厂街变质岩带的一部分,受变质地层为一套晚古生代含火山岩夹碳酸盐岩的陆源碎屑沉积。变质强度为低绿片岩相(绢云母-绿泥石级),变质作用类型为区域低温动力变质(绿片岩相型),变质作用时期为中-晚三叠世。东岗变质岩带的研究,有助于提高昌宁-孟连蛇绿混杂岩带的研究程度。TheDonggang Metamorphic Belt in the Lancang area,southwestern Yunnan,is part of the Changning-Menglian Metamorphic Belt or the Tongchangjie Metamorphic Belt.The metamorphosed strata are a set of Late Paleozoic terrestrial clastic sediments of volcanic rocks interbedded with carbonate rocks.The metamorphic intensity is of the low greenschist facie(sericite-chlorite grade),and the type of metamorphism is regional low-temperature dynamometamorphism(greenschist facies type),occurred during the Middle to Late Triassic.Research on the Donggang Metamorphic Belt is expected to enhance the understanding of the Changning-Menglian ophiolitic melange belt.

关 键 词：变质岩 变质作用 东岗变质岩带 澜沧地区 云南澜沧 

分 类 号：P588.34[天文地球—岩石学]