宁夏韦州矿区煤变质规律及其成因分析  

Coal Metamorphic Pattern and Genetic Analysis of Coals in Weizhou Mining Area, Ningxia

作　　者：李建国 郑毅 柳强 

机构地区：[1]宁夏地质矿产勘查开发局,宁夏银川750021 [2]宁夏矿产地质调查院,宁夏银川750021

出　　处：《中国煤炭地质》2013年第9期6-9,共4页Coal Geology of China

基　　金：宁夏自然科学基金资助项目(NZ13251)

摘　　要：韦州矿区位于宁夏中南部,煤层赋存于石炭—二叠系,现已查明可供开采的煤层主要沿韦州向斜两翼展布,煤类分布见有气煤、肥煤、焦煤、瘦煤、贫煤以及无烟煤等,煤变质程度整体上呈现出向斜东翼—向斜转折端—向斜西翼逐渐增高的趋势。综合分析认为,矿区煤层在以深成变质作用为主的基础上叠加了热水变质及动力变质作用,邻近韦州向斜西翼的深大断裂以及热液活动是影响矿区煤变质程度的主要因素。The Weizhou mining area is situated in the central south part of Ningxia; coal seams belong to Permo-Carboniferous System. It is known that the mineable coal seams are distributed along the two limbs of the Weizhou syncline; coal ranks have gas coal, fat coal, pri- mary coking coal, lean coal, meager coal and anthracite, degree of coal metamorphism presents a trend of gradually increasing from east limb, turning point to west limb of the syncline. The comprehensive analysis considered that the basic metamorphism of coal seams in the area is mainly hypozonal metamorphism then superimposed hydrothermal and dynamic metamorphisms. The discordogenic fault near the west limb of the syncline and hydrothermal activities are the main factors to impact degree of coal metamorphism in the mining area.

关 键 词：韦州矿区 煤变质作用 热水变质 深大断裂 构造活动 

分 类 号：P618.11[天文地球—矿床学]