东疆哈尔里克变质地带变质作用特征及形成构造环境研究

本文通过对哈尔里克变质地带的变质岩石学、变质矿物及矿物包裹关系的研究，确定该变质带的形成曾经历了晚古生代中、晚石炭世的高温－低压型的区域热变质作和晚石炭世末期中温－中压型的断裂区域变质作用，且后者叠加改造了前者。前者温度为922℃～780 ℃，后者可划分出四个递增变质带，温压为450℃～670℃和2.3～4.1kb，这一研究反映丁哈尔里克泥盆纪火山岛弧经过了由拉伸作用到碰撞挤压造山引发的A型俯冲作用演变过程，并产生了上述相应的变质现象。

CHARACTERISTICS OF METAMORPHISM IN THE HARLIK METAMORPHIC BELT,EAST XINJIANG,AND ITS TECTONIC ENVIRONMENT

Based on researches of metamorphic rocks and minerals in the metamorphic belt in Harlik, the authors suggest that the metamorphic belt underwent two metamorphic stages. The first stage was the regional thermal metamorphism of high-temperature (T= 922～780℃)and low-pressure during the early-middle Carboniferous of late Paleozoic. The second stage was the regional faulting metamorphism of medium-temperature and medium-pressure (T= 450～670℃, p= 2.3～ 4.1Kb)during the end of Carboniferous. The second stage can be divided into four metamorphic zones, retailed research suggests the following tectonic evolution mode1: Therma1 metamorphism was related to intra-island-arc tension, while regiona1 faulting metamorphism was caused by A-type subduction in the process of collisional orogeny.