天山北缘及邻区早中侏罗世煤变质因素分析  

METAMORPHIC ANALYSIS OF COAL OF THE EARLY-MIDDLE JURASSIC IN THE NORTHERN TIANSHAN AND ITS ADJACENT AERA

作　　者：张慧[1] 张培河[1] 靳秀良[1] 武彩英[1] 

机构地区：[1]煤炭科学研究总院西安分院,陕西西安710054

出　　处：《新疆地质》2001年第4期256-259,共4页Xinjiang Geology

摘　　要：通过对天山地区的断裂构造、地震、地热、煤级及其时空分布、煤层埋深等因素的综合分析,认为天山北缘及其邻区早中侏罗世大范围分布的低级烟煤主要由深成变质作用形成,深成变质作用具普遍性。深大断裂带及其附近局部发育的中级烟煤是在深成变质基础上,叠加了高温气液热变质作用而形成。属于区域岩浆热变质作用的一种模式,也是西北地区早中侏罗世煤变质的特点之一。Synthetically analyzed the fracture, earthquake, coal ranks and their distribution, coal seam抯 buried depth and so on, the authors have realised that low-rank bituminites, early-middle Jurassic in Tianshan area, are formed by burial metamorphism, and it is widespread. Medium-rank bituminites are formed by pneumato-hydrothermal metamorphism on the basis of burial metamorphism, and it is partial. This is a model of telemagmatic metamorphism and a character of coal metamorphism early-middle Jurassic in northwest of China.

关 键 词：天山北缘 早中侏罗世 煤 煤级 变质 高温气液 

分 类 号：P618.11[天文地球—矿床学]