新疆阿祖拜地区变质作用特征及构造演化  

Characteristics of the Metamorphism and Tectonic Evolution in the Azubai Area,Xinjiang

作　　者：张宏宝[1] 张洋[1] 谷永昌[2] 王书芬[3] 李金和[1] 高雄[1] 

机构地区：[1]河北省区域地质矿产调查研究所,河北廊坊065000 [2]天津地质调查中心,天津300170 [3]河北省保定地质工程勘查院,河北保定071051

出　　处：《地质调查与研究》2012年第4期283-287,共5页Geological Survey and Research

基　　金：新疆1:5万区域地质矿产调查项目管公项目室(XJQDZ2004-03)

摘　　要：新疆阿祖拜地区发育两种类型的区域变质作用,第一种类型属于区域低温动力变质作用,第二种类型属于区域动力热流变质作用。变质作用时代发生在晚古生代华力西期,其间有3个阶段变形变质作用发生,早期阶段以形成低温绿片岩相变质岩石组合为主,构造片理(S1)与原岩沉积层理(S0)基本一致。中期阶段以区域动力热流变质作用为主,形成典型的递增变质带,并使早期构造片理(S1)发生紧闭褶皱,也是阿尔泰华力西期造山带变形变质的主期。晚期阶段为退化变质作用,变质作用轻微,变形作用不明显。不同阶段和不同的变形变质作用类型代表了不同的大地构造环境,记录了造山带的演化历史和动力学过程。The Azubai area of Xinjiang developed two types of regional metamorphism. The first type belongs to regional low-temperature dynamic metamorphic type and the second one belongs to regional dynamic heat flow metamorphism. The metamorphism age is the Hercynian period and late Paleozoic. During these periods, there are three stage deformation and metamorphism occurred. In the early stage, metamorphism is characterized by typical metamorphic mineral assemblage of greenschist facies with low metamorphic temperature, and the tectono-schistose formation （S1） is basically the same with sedimentary bedding of its own primary rock （SO）. The intermediate stage, mainly with regional dynamic heat flow metamorphism, formed typical progressive metamorphic belt, and the tectono-schistose formation （$1） formed tight folds, and this stage also constitutes the main period of deformation and metamorphism of the Altai Hercynian orogenic belt. Retrogressive metamorphism occurred in the late stage, metamorphism and deformation is not obvious. So, different stage, different deformation and metamorphic types reveal different tectonic conditions and record the evolutionary history and geodynamic process in the Altai Hercynian orogenic belt of Xinjiang.

关 键 词：阿祖拜 变质作用类型 递增变质带 构造演化 

分 类 号：P588.34[天文地球—岩石学]