宁武煤田2号煤中镓的富集与赋存特征Enrichment and Occurrence of Ga in No. 2 Coal Seam of Ningwu Coalfield
马娟娟,张帆,李舒研,李敬智,王金喜
摘要(Abstract):
宁武煤田是我国典型的煤伴生资源丰富的煤炭基地。为研究煤中Ga的成矿规律,从宁武煤田2号煤中采集了117个煤样,通过工业分析、X射线衍射、扫描电子显微镜、X射线荧光光谱、电感耦合等离子体质谱和逐级化学提取实验对样品进行测试分析。结果表明宁武煤田2号煤中Ga的平均含量为30.93μg/g,整体上属于轻度富集—富集。逐级化学提取的结果显示煤中Ga的赋存以残渣态为主,占比87~92%,其次为有机态,占比6%~10%。由煤中Ga与煤质和常量元素的相关性分析认为,高岭石、勃姆石等黏土矿物是煤中Ga的主要矿物载体,黏土矿物对Ga的吸附是2号煤中Ga富集的主要原因。
关键词(KeyWords): 煤中镓;富集规律;赋存状态;宁武煤田
基金项目(Foundation): 国家自然科学基金项目“华北盆地石炭二叠纪森林沼泽野火的证据及其古气候效应”(41807305);; 河北省自然科学基金项目“深部低透气性煤层瓦斯赋存规律及解吸特征研究”(E2020209074)
作者(Author): 马娟娟,张帆,李舒研,李敬智,王金喜
参考文献(References):
- [1] 代世峰,任德贻,李生盛.内蒙古准格尔超大型镓矿床的发现[J].科学通报,2006(2):177-185.
- [2] 秦勇,王文峰,程爱国,等.首批煤炭国家规划矿区煤中镓的成矿前景[J].中国煤炭地质,2009,21(1):17-21,26.
- [3] SUN Y.China geological survey proved the existence of an extra-large coal associated lithium deposit[J].Acta Geologica Sinica (English Edition),2015,89(1):311.
- [4] QIN S,SUN Y,LI Y,et al.Coal deposits as promising alternative sources for gallium[J].Earth-Science Reviews,2015,150:95-101.
- [5] 黎彤.地壳元素丰度的若干统计特征[J].地质与勘探,1992(10):3-9.
- [6] 李华,许霞,杨恺.山西平朔矿区4号煤中锂、镓资源成矿地质特征研究[J].中国煤炭地质,2014,26(12):17-19.
- [7] KETRIS M P,YUDOVICH Y E.Estimations of Clarkes for Carbonaceous biolithes:World averages for trace element contents in black shales and coals[J].International Journal of Coal Geology,2009,78(2):135-148.
- [8] 吴国代,王文峰,秦勇,等.准格尔煤中镓的分布特征和富集机理分析[J].煤炭科学技术,2009,37(4):117-120.
- [9] 李聪聪,宁树正,乔军伟,等.重庆南武矿区煤中镓赋存规律及控制因素[J].煤田地质与勘探,2018,46(3):15-20.
- [10] 黄婷,张庆辉,屈晓荣.保德杨家湾勘查区煤中镓的赋存及富集成因[J].中国煤炭,2013,39(11):61-66.
- [11] DAI S,LI T,JIANG Y,et al.Mineralogical and geochemical compositions of the Pennsylvanian coal in the Hailiushu Mine,Daqingshan Coalfield,Inner Mongolia,China:Implications of sediment-source region and acid hydrothermal solutions[J].International Journal of Coal Geology,2015,137:92-110.
- [12] 李娟,关英斌,郭婵妤,等.白额井田煤中镓的分布特征及其成因机制研究[J].河北工程大学学报(自然科学版),2012,29(4):62-65,78.
- [13] 高颖,郭英海.河东煤田北部煤中镓的分布特征及赋存机理分析[J].能源技术与管理,2012 (1):111-113,153.
- [14] LIU B,WANG J,HE H,et al.Geochemistry of Carboniferous coals from the Laoyaogou mine,Ningwu coalfield,Shanxi Province,northern China:Emphasis on the enrichment of valuable elements[J].Fuel,2020,279.
- [15] WANG J,LING P,YANG J,et al.Geochemical characteristics of hazardous trace elements in the coal from the Pingshuo mine district,China[J].World Journal of Engineering,2013,10(5):463-470.
- [16] 刘帮军,林明月,褚光琛.山西平朔矿区4#煤中镓的分布规律与富集机理[J].中国煤炭,2014,40(11):25-29.
- [17] 周建飞,王金喜,白观累,等.山西平朔矿区11#煤中镓的分布特征及富集因素[J].煤炭技术,2014,33(11):82-84.
- [18] 代世峰,任德贻,唐跃刚.煤中常量元素的赋存特征与研究意义[J].煤田地质与勘探,2005 (2):1-5.
- [19] DAI S,LUO Y,SEREDIN V V,et al.Revisiting the late Permian coal from the Huayingshan,Sichuan,southwestern China:Enrichment and occurrence modes of minerals and trace elements[J].International Journal of Coal Geology,2014,122:110-128.
- [20] FILIPPIDIS A,GEORGAKOPOULOS A,KASSOLI-FOURNARAKI A,et al.Trace element contents in composited samples of three lignite seams from the central part of the Drama lignite deposit,Macedonia,Greece[J].International Journal of Coal Geology,1996,29(4):219-234.
- [21] 高桂梅,松丽涛,曹坤,等.黑岱沟露天矿6号煤层煤中微量元素赋存特征[J].煤炭转化,2022:1-15.
- [22] WANG W,WANG H,FAN Y,et al.Distribution characteristics and enrichment factor gallium in coal seam No.4 in Majialiang[J].IOP Conference Series:Earth and Environmental Science,2020,514(2).