豫西晚二叠世煤中稀土元素地球化学特征及指示意义  

Geochemical characteristics of rare earth elements in Late Permian coals in Western Henan and indicative meaning

作　　者：蔺敬妍 孙明晓 李鸿豆 左贵彬 郭文牧 Maksim G Blokhin 王志勇 田泽奇 肖林 LIN Jingyan;SUN Mingxiao;LI Hongdou;ZUO Guibin;GUO Wenmu;Maksim G Blokhin;WANG Zhiyong;TIAN Zeqi;XIAO Lin(Department of Geoscience and Engineering,Hebei University of Engineering,Handan 056038,China;Far East Geological Institute,Russian Academy of Sciences Far Eastern Branch,Vladivostok 690022,Russia)

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]俄罗斯科学院远东分院远东地质研究所,俄罗斯符拉迪沃斯托克690022

出　　处：《煤炭科学技术》2023年第5期184-192,共9页Coal Science and Technology

基　　金：河北省杰出青年基金资助项目(D2021402017);河北省自然科学基金资助项目(D2021402036);河北省高等学校科学技术研究资助项目(ZD2020184)。

摘　　要：随着稀土金属在医疗、新材料等高科技领域的广泛应用,其战略地位不断提升。为了探究豫西晚二叠世煤中稀土元素的富集程度、赋存状态以及沉积环境,以河南西部慧祥矿区二_(1)煤的20个煤分层样品为主要研究对象,运用电感耦合等离子质谱仪(ICP-MS)、X射线荧光光谱(XRF)的方法对研究区煤分层样品中稀土元素与常量元素进行测试,探讨了研究区煤中稀土元素的含量特征和富集程度;利用相关性分析和特征参数对样品中稀土元素的赋存状态以及沉积环境进行探讨。结果表明:慧祥矿区二_(1)煤中,稀土元素的质量浓度为35.29~133.61μg/g,平均浓度为79.14μg/g,略高于世界煤中稀土元素的平均浓度,但明显低于中国煤中稀土元素的平均浓度,稀土元素含量偏低,且以轻稀土富集为主;慧祥矿区二_(1)煤中稀土元素与灰分(Ad)以及SiO_(2)、Al_(2)O_(3)等主要氧化物呈现明显的正相关,表明稀土元素主要赋存于黏土矿物中;研究区样品中Ce元素和Eu元素负异常,(Gd/Gd)_(N)^(*)的轻微正异常,说明研究区主要受陆源的影响,成煤环境为弱酸性的还原环境。With the wide application of rare earth metals in high-tech fields such as medical treatment and new materials,its strategic position has been increasing.As a major country in rare earth,China supplies rare earth products of different varieties and grades to all countries in the world,making great contributions to the development of emerging industries in the world.In order to explore the enrichment degree,occurrence state and sedimentary environment of rare earth elements in late Permian coal in western Henan,20 stratified coal samples from No.2_(1)coal in Huixiang mining area in western Henan were taken as the main research object.The rare earth elements and major elements in stratified coal samples were measured by ICP-MS and XRF,and the content characteristics and enrichment degree of rare earth elements in coal samples were discussed.The occurrence state and sedimentary environment of rare earth elements in samples were discussed by correlation analysis and characteristic parameters.The results show that the mass concentration of REY is 35.29-133.61μg/g,and the average concentration is 79.14μg/g,which is slightly higher than the average concentration of REY in the world coal,but obviously lower than the average concentration of REY in China coal.The REY content is low,and LREY is mainly enriched.There is a significant positive correlation between REY and ash content(Ad),SiO_(2),Al_(2)O_(3)and other major oxides in the No.2_(1)coal of Huixiang mining area,indicating that REY mainly occurs in clay minerals.The negative anomalies of Ce and Eu elements and slight positive anomalies of(Gd/Gd)_(N)^(*)in the samples in the study area indicate that the study area is mainly affected by terrigenous sources and the coal forming environment is a weakly acidic reducing environment.

关 键 词：稀土元素 豫西晚二叠世煤 成煤环境 地球化学 

分 类 号：P618.11[天文地球—矿床学]