山西西铭煤矿煤中稀土元素地球化学特征及指示意义  

Geochemical Characteristics of Rare Earth Elements and the Indicative Significance in the Ximing Coal Mine,Shanxi Province

作　　者：王珍珍 李进孝 张珂 郭文牧 张绍韡 肖林 WANG Zhenzhen;LI Jinxiao;ZHANG Ke;GUO Wenmu;ZHANG Shaowei;XIAO Lin(Department of Gescence and Enginerng,Hebei University of Enineering,Handan,Hebei 056038,China;Shanxi Institute of Geology and Mineral Resources,Taiyuan,Shanxi 030001,China)

机构地区：[1]河北工程大学地球科学与工程学院,河北邯郸056038 [2]山西省地质矿产研究院,山西太原030001

出　　处：《现代地质》2021年第4期1009-1017,共9页Geoscience

基　　金：国家自然科学基金(41641019);河北省自然科学基金(D2016402104)。

摘　　要：采用电感耦合等离子体质谱(ICP-MS)及X射线荧光光谱(XRF)等方法,分析山西西铭煤矿2号、3号、8号和9号煤中稀土元素的含量特征和赋存状态,并根据稀土元素Ce、Eu、Gd、Y和常量元素Al_(2)O_(3)/TiO_(2)的异常揭示其成煤环境及物质来源。研究结果显示:(1)西铭煤矿煤中稀土元素含量与世界煤值和美国煤值基本相等,但低于中国煤中稀土元素含量的平均值;稀土元素以中-重稀土富集型为主,其次是轻稀土富集型和轻-中稀土富集型。(2)西铭煤矿成.煤环境总体上以弱还原性为主,且受酸性沼泽水环境影响。(3)煤中稀土元素的物质来源主要为陆源碎屑物质,判断其沉积源岩为酸性或中-酸性岩浆岩。Concentration characteristics and state of occurrence of rare earth elements(REEs) in No.2,No.3, No.8 and No.9 coals of the Ximing Mine in Shanxi were analyzed by inductively coupled plasma mass spectrometry(ICP-MS) and X-ray fluorescence spectrometry(XRF). According to the anomalies of Ce, Eu, Gd, La, Y and TiO_(2)/Al_(2)O_(3),we revealed the formation environment of coal and the possible REE sources. The results show that:(1) The REE contents of the Ximing coal is very similar to the global average value and the value of the United States coal, but lower than the average value of the Chinese coal. The REEs are mainly MREE-HREE-enriched, followed by LREE and LREE-MREE-enriched.(2) The coal-forming environment is mainly weakly reducing and affected by acidic marsh water environment.(3) The REEs source may have been mainly terrigenous detrital materials, and the sedimentary source rocks are determined to be felsic or intermediate-felsic magmatic rocks.

关 键 词：稀土元素 地球化学特征 成煤环境 西铭煤矿 

分 类 号：P618.11[天文地球—矿床学] P595[天文地球—地质学]