摘要
为系统研究河南省石炭-二叠纪煤的变质作用类型及变质演化规律,采用野外钻探、测试分析、统计、计算机模拟等方法,对石炭-二叠纪煤类、煤的变质程度、变质作用类型等进行研究。结果表明,石炭-二叠纪煤变质程度总体较高,以焦煤-无烟煤为主,可采煤层的变质程度以及煤类在平面上近似呈环带状分布。煤的变质作用主要为深成变质作用、动力变质作用、接触变质作用和区域岩浆热变质作用。深成变质作用对石炭-二叠纪煤的变质具有普遍控制作用。煤的变质演化历程表明,经历了印支期三叠纪深成变质作用;燕山期侏罗纪,煤系处于高温低压带环境,岩浆活动强烈,区域岩浆变质作用使煤级剧增,叠加动力变质作用、接触变质作用后,局部煤级进一步增加,形成了现今石炭-二叠纪煤变质分带,其后不同时期各类变质作用对煤级的影响已经非常微弱。
To systematically study Carboniferous-Permian coal metamorphism type and evolution pattern, the field drilling, test and analysis, statistics, computer simulation etc methods have been used;study on coal ranks, degree and type of metamorphism, carried out. The result has shown that degree of metamorphism is higher as a whole, coal ranks are mainly coking coal to anthracite, the distribution form of metamorphism degree and coal ranks is approximately like a girdle band. Coal metamorphism has mainly hypozonal, dynamic, contact, and regional magmatic thermal metamorphisms. The hypozonal metamorphism has general control effect on Carboniferous-Permian coal. Experienced Indo-Chinese epoch Triassic hypozonal metamorphism, Yanshanian Jurassic, coal measures were in high temperature and low pressure zone, magmatic activities strong, regional magmatic metamorphism made coal rank leaped, after stacked dynamic metamorphism and contact metamorphism, coal ranks further upgraded locally, thus formed present Carboniferous-Permian coal metamorphic zoning, subsequent metamorphism impact on coal ranks is very weak.
作者
任聚奎
李明培
张正飞
宋建军
王德伟
邵龙义
Ren Jukui;Li Mingpei;Zhang Zhengfei;Song Jianjun;Wang Dewei;Shao Longyi(Henan Coal Geological Exploration and Research Institute,Zhengzhou,Henan 450052;School of Geology and Environment,Xi’an University of Science and Technology,Xi’an,Shaanxi 710054;Innovation Technology Research Institute of Shaanxi Investment Group Co.,Ltd.,Xi’an,Shaanxi 710004;The First Institute,Henan Coal Geological Resources and Environmental Investigation Center,Zhengzhou,Henan 450000;Henan Bureau of Coal Geology,Zhengzhou,Henan 450016;School of Geosciences and Surveying Engineering,CUMTB,Beijing 100083)
出处
《中国煤炭地质》
2021年第7期1-6,共6页
Coal Geology of China
关键词
煤类分布
煤变质作用
石炭-二叠纪
河南省
coal ranks distribution
coal metamorphism
Carboniferous-Permian
Henan Province
