基于煤岩煤质煤相特征的沁水15号富锂煤古环境分析
Paleoenvironmental Analysis of Qinshui No.15 Li-rich Coal Based on the Characteristics of Coal Petrology,Coal Quality and Coal Facies
魏竣滨 1韩培亮2
作者信息
- 1. 内蒙古矿业开发有限责任公司,内蒙古呼和浩特 010020
- 2. 太原理工大学矿业工程学院,山西太原 030024
- 折叠
摘要
以沁水东南部15号富锂煤为研究对象,采用显微光学、XRD等技术方法开展了宏观煤岩特征、显微煤岩特征、煤质特征和煤相研究.结果表明,沁水东南太原组15号煤属低水分、低灰分、低挥发分、高硫贫煤.宏观煤岩类型以半亮型、半暗型煤为主;显微煤岩组分以镜质组为主,惰质组次之,壳质组少见;无机显微组分以高岭石等黏土矿物为主,可见方解石、黄铁矿、石英、菱铁矿、石膏和锆石等矿物.15号煤形成于滨岸带沉积体系.古沉积环境主要为潮湿-浅覆水、强活水环境的开放沼泽相;植物组织保存程度较低,植物以水生或草本植物为主;成煤泥炭沼泽环境受地下水影响较小,海水影响较大,物源供给具有多元性.
Abstract
Taking No.15 lithium-rich coal in southeast Qinshui as the research object,the macroscopic characteristics of coal petrology,coal quality and coal facies are studied by means of microoptics and XRD.The results show that No.15 coal of Taiyuan Formation in southeast Qinshui is low moisture,low ash,low volatile and high sulfur poor coal.The macro-types of coal and rock are mainly semi-bright and semi-dark briquette.Vitrinite is the main component of the vitrinite,inertinite is the second,and exinite is rare.The inorganic macerals are dominated by clay minerals such as kaolinite,and minerals such as calcite,pyrite,quartz,siderite,gypsum and zircon can be found.No.15 coal was formed in the shoreline sedimentary system.The paleo-environment was mainly an open swamp facies with wet-shallow water cover and strong active water environment.Plant tissues are poorly preserved and plants are mainly aquatic or herbaceous;The environment of coal-forming peat bogs is less affected by groundwater and more affected by seawater,and the provenance is diversified.
关键词
富锂煤/煤岩学/煤相/古沉积环境/沁水盆地Key words
lithium-rich coal/coal petrology/coal facie/paleo-environment/Qinshui basin引用本文复制引用
基金项目
山西省自然科学基金(202203021221077)
山西省自然科学基金(201901D111050)
出版年
2024
NETL
NSTL
万方数据