黔西松河矿区煤中元素地球化学特征及成煤环境意义  

Geochemistry characteristics and coal formation environmental significances of elements in coal from Songhe Mining Area in western Guizhou

作　　者：金军 高为[1,2] 孙键 韩忠勤[1] 郑德志[4] 韩明辉 JIN Jun;GAO Wei;SUN Jian;HAN Zhongqin;ZHENG Dezhi;HAN Minghuit(Guizhou Pravineial Engineering Technology Research Center of Coalbed Methane and Shale Gas, Guiyang 550008, China;Gaizhou Provincial Coalfield Geology Bureau, Guiyang 550008, China;SINOPEC Research Institute of Petroleum Engineering,Belting 100101,China;China Coal Research lnstitute,Beijing lO0013,China)

机构地区：[1]贵州省煤层气页岩气工程技术研究中心,贵州贵阳550008 [2]贵州省煤田地质局,贵州贵阳550008 [3]中国石化石油工程技术研究院,北京100101 [4]煤炭科学研究总院,北京100013

出　　处：《煤炭科学技术》2017年第12期166-173,204,共9页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2016ZX05034004-007;2016ZX05044001-005)

摘　　要：为查明黔西松河矿区煤中元素的富集程度及富集成因,以松河矿区龙潭组上、中、下煤组9层主采煤层为研究对象,利用煤炭勘查报告中煤质化学成分及煤中Cu、Co、Ni、Sr、Be、Ba、V等7种微量元素质量分数等参数,对主要煤层的元素地球化学特征进行了研究,并依常量元素和微量元素的含量及比值探讨了龙潭组不同含煤层段成煤环境差异。结果表明:该区煤层常量元素氧化物以SiO2、Al_2O_3和Fe_2O_3为主,CaO次之,各常量元素丰度总体与中国煤均值相似;煤中微量元素Cu、Co、Ni、Sr、Be、Ba和V的质量分数,不但高于黔西煤均值,而且显著高于中国煤均值和世界煤均值,其中V尤为富集。灰成分指数(Fe_2O_3+CaO+MgO)/(SiO2+Al_2O_3)、Sr/Ba、Ni/Co及S的质量分数在龙潭组上、中、下煤组煤层中呈现高-低-高的变化规律,反映龙潭组上、下煤组煤层成煤时受海水影响较大,而中煤组煤层成煤时受海水影响较小。In order to investigate the enrichment degree and enrichment causes of elements in coal from Songhe Mining Area in western Guizhou,with nine major mining seams from top seam, middle seam and low seam of Longtan Formation in Songhe Mining Area as the study objects,in application of the chemical contents from the coal exploration report and the mass fractions of the seven trace elements in the coal,such as Cu,Co,Ni,Sr,Be,Ba and V,a study was conducted on element geochemical features of the major seams, According to the contents and ratio of the macroelement and trace elements,the paper had a discussion on the differences between eoal formation environ- ments for different seam in Longtan Formation. The results showed that the oxides of coal macroelement mainly with SiO2 , Al2O3 amd Fe2O3 and secondly with CaO, and each macroelement abundance generally would be similar to the average value of China eoal. The quality fractions of microelements, as Cu, Co, Ni, Sr, Be, Ba and V in coal would not only higher than average value of western Guizhou and would obviously higher than average value of China coal and the world coal, Among them, the V element would be enrichment. In the top, middle and low seams of Longtan Formation,the ash content index （Fe2O3 ＋CaO＋MgO）/（ SiO2 ＋Al2O3 ）, Sr/Ba, Ni/Co and the quality fi＇aetures of S would have a high - low - high variation law. In coal formation period,the seam in low coal formation was highly affected by sea water. In the coal formation period, the seam in the middle coal formation was lowly affected by sea water.

关 键 词：常量元素 微量元素 成煤环境 松河矿区 

分 类 号：P618.11[天文地球—矿床学]