潘吉塔格煤矿中-下侏罗统煤岩煤质特征及成煤环境分析  

Petrography and Quality Characteristics and Coal Forming Environment of Middle-Lower Jurassic Coal Seam in the Panjitage Coal Mine

作　　者：郑媛媛 张博文 王猛 德勒恰提[1,2] 徐健 冯汉青[1,2] Zheng Yuanyuan;Zhang Bowen;Wang Meng;Deleqiati;Xu Jian;Feng Hanqin(College of Geology and Mining Engineering Xinjiang University,Urumqi,Xinjiang,830049,China;Laboratory of Continental Dynamics and Metallogenic Prognosis of Central Asian Orogenic Belt,Urumqi,Xinjiang,830049,China;School of Resources and Earth Science,China University of Mining&Technology,Xuzhou,Jiangsu,221116,China)

机构地区：[1]新疆大学地质与矿业工程学院,新疆乌鲁木齐830049 [2]新疆大学中亚造山带大陆动力学与成矿预测实验室,新疆乌鲁木齐830049 [3]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《新疆地质》2020年第3期388-394,共7页Xinjiang Geology

基　　金：自治区高校科研计划自然科学项目(XJEDU2017S010)资助。

摘　　要：为了揭示潘吉塔格矿区不同煤岩煤质形成条件及其垂向变化特征,探讨该区煤岩煤质与成煤环境的关系,采用煤岩学和地球化学等方法,基于对主采煤层样品煤岩鉴定、工业分析及灰成分指标等数据分析,研究结果表明:该煤矿主要煤层以半亮型煤为主,富镜质组、贫惰质组,煤质呈低灰、低硫、高挥发分特征,煤灰成分以SiO2为主,煤变质阶段较低,煤类均属长焰煤。煤层由深至浅垂向演化呈镜惰比由小到大,灰分由高变低,挥发分由低变高,硫含量先增大后减小再增大,成煤环境由弱氧化-还原型到还原型的变化趋势。综合分析表明,研究区中—下侏罗统主要煤层形成于湖泊-三角洲淡水沉积环境,具陆相成煤特征,成煤环境温暖潮湿。其中西山窑组煤岩煤质特征与八道湾组有显著区别,成煤环境迥异。In order to reveal the formation conditions and vertical variation characteristics of different coal petrography and quality in the Panjitage coal mine,and to explore the relationship between coal quality and coal-forming environment in this area.Methods such as coal petrology and geochemistry were adopted.Based on the data analysis of coal petrography identification,industrial analysis and ash component index of main coal seam samples.The research results showed that:The results show that the main coal seams in main coal mine are semi-bright coal.The coal petrography is characterized by the rich vitrinite-poor inertinite,low ash,low sulfur and high volatile.The coal ash is mainly composed of SiO2.The coal metamorphism stage is low,and the coal is all belong to long-flame coal.The vertical evolution of coal seams present the various trends from deep to shallow described as:the V/I ratio change from small to big,the ash content change from high to low,the volatile change from low to high,the sulfur content increase initially to decrease second and increase afterwards,and the coal-forming environment change from weak oxidation-reduction type to reduction type.Comprehensive analysis shows that,the main coal seams of the Middle-Lower Jurassic are formed in lakes-deltas freshwater sedimentary environment of coal formation in terrestrial facies,and also the coal-forming environment are warm and humid.The coal petrography and quality of the Xishanyao Formation and Badaowan Formation are significantly different,even their coal-forming environments are also quite different.

关 键 词：潘吉塔格煤矿 中—下侏罗统 煤岩 煤质 成煤环境 

分 类 号：P618.11[天文地球—矿床学] P534.52[天文地球—地质学]