First discovery of coesite in eclogite from East Kunlun, northwest China  

作　　者：Hengzhe Bi Shuguang Song Jinlong Dong Liming Yang Shengsheng Qi Mark B.Allen 

机构地区：[1]MOE Key Laboratory of Orogenic Belt and Crustal Evolution,School of Earth and Space Sciences,Peking University,Beijing 100871,China [2]Qinghai Bureau of Geological Survey,Xining 810012,China [3]Department of Earth Sciences,Durham University,Durham DH13LE,UK

出　　处：《Science Bulletin》2018年第23期1536-1538,共3页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China (41572040);the Major State Basic Research Development Program of China (2015CB856105)

摘　　要：Ultrahigh-pressure (UHP)metamorphism plays important roles in continental dynamics.Understanding of this process has been enhanced by the discovery of coesite and micro-diamond from supracrustal rocks [1].Such UHP mineral inclusions provide unequivocal evidence that the least dense part of the lithosphere can be buried to 100-150km or more,and then returned to the surface.Coesite,an ultrahigh-pressure polymorph of SiO2stable above 2.7GPa at metamorphic temperatures,is one of the most important index minerals for UHP metamomhism [1,2].

关 键 词：COBALT FELDSPAR East KUNLUN ECLOGITE 

分 类 号：N[自然科学总论]