中国蓝片岩带的分布及其构造意义  

BLUESCHIST BELT IN CHINA AND ITS TECTONIC SIGNIFICANCE

作　　者：代艳娟[1,2] 曾普胜[1,2,3] 麻菁 苟瑞涛 王聚杰[2,3] 

机构地区：[1]昆明理工大学国土资源工程学院,昆明650000 [2]国家地质实验测试中心,北京100037 [3]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《地质力学学报》2015年第3期426-437,共12页Journal of Geomechanics

基　　金：国土资源大调查项目(12120113002500);国土资源部公益性行业科研专项(201211078);国家自然科学基金项目(41072073)

摘　　要：在前人研究的基础上,根据变质时代及产地将中国蓝片岩带划分为20个带,选取不同时代典型蓝片岩带论述其特征(分布区域、大体规模、原岩特征、形成时代及矿物组合),并对其地质成因进行分析。中国蓝片岩带生成方式复杂,但均与俯冲消减作用有关,且大多属B型俯冲消减;部分地段叠加了A型俯冲的高压—超高压变质带(如阿尔金带、大别-苏北带、南迦巴瓦-密支那带等)。中国蓝片岩带在时代上可以分为元古代(晋宁期)、古生代(加里东—海西期)、中生代(印支—燕山期)和新生代(喜马拉雅期)4个时期,每个时期蓝片岩带的形成大多与中国地体增生过程中洋盆的消减俯冲有关,并在特定地段经历后期的陆内俯冲(高压—超高压俯冲)叠加影响。On the basis of previous studies,the blueschist belt in China can be divided into 20 parts according to the metamorphic age and original place. This paper selects some typical blueschist belts of different times to discuss their characteristics（ such as distribution area,gross scale,the features and formation age of the original rock and mineral combination）, and analyze their geological genesis. The generation patterns of China＇s blueschist belts are complicated,they are all associated with the subduction,and mostly belong to the B-type subduction. Part of regions,however,also are superposed by the A-type subduction which are UHP and HP metamorphic belts（ such as Arkin,Dabie belt,Namjagbrawa Subei Myitkyina band,etc.）. China＇s blueschist belts can be divided into four formation ages,which are the Proterozoic（ Jinning period）,the Paleozoic（ Caledonian, Hercynian）, the Mesozoic（ Indosinian to Yanshanian） and the Cenozoic（ Himalayan）. And the formation of the blueschist belts in each period are mostly related with the subduction of the ocean basin in the process of China＇s terrane accretion,and some also are effected by the superposition of the later intracontinental subduction（ high-ultrahigh pressure subduction） at some specific areas.

关 键 词：蓝片岩带 高压俯冲 中国 

分 类 号：P588.3[天文地球—岩石学]