四川盆地东部晚二叠世煤中稀土元素富集机理研究

项目名称： 四川盆地东部晚二叠世煤中稀土元素富集机理研究

项目编号： No.41502162

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 邹建华

作者单位： 重庆地质矿产研究院

项目金额： 21万元

中文摘要： 煤型稀有金属矿床的研究，是当今煤地质学研究的热点之一。现从煤中提取利用的有益金属有锗、铀和镓，而稀土作为煤中下一个最有可能被提取的元素，日益受到重视。本课题以四川盆地东部晚二叠世煤中异常富集的稀土元素为研究对象，利用电感耦合等离子体质谱（ICP-MS）、X射线荧光光谱（XRF）、X射线衍射（XRD）、带能谱的扫描电镜（SEM-EDX）和逐级化学提取（SCE）等方法，充分运用煤地质学、地球化学和矿床学等理论，深入研究四川盆地东部晚二叠世煤中稀土元素的时空分布、物质来源和赋存状态，阐明煤中稀土元素的形成期次和影响其形成的地质地球化学因素（物源、热液流体、火山活动和聚煤环境等），结合盆地演化历史揭示煤中稀土元素富集机理。

中文关键词： 晚二叠世煤；稀土元素；富集机理；四川盆地东部

英文摘要： The study on coal-hosted rare metal deposits has become a hot point issue of coal geology research. As the germanium, uranium and gallium have been extracted from coal successfully, rare earth elements and yittrium (REY) are supposed as the next metals to be extracted as a byproduct from coal, and are receiving more attention currently. This study choose the REY in the Late Permian coal in the eastern Sichuan basin as study object, based on the Inductively Coupled Plasma Mass Spectrometry (ICP-MS), X ray fluorescence (XRF), X ray diffraction (XRD), Scanning Electron Microscopy equipped with an Energy-Dispersed X-ray spectrometer (SEM-EDX), and Sequential Chemical Extraction (SCE) methods, combined with theories of coal geology, geochemistry and metallogeny, to deeply study the temporal and spatial distribution, origin and modes of occurrence of REY in the Late Permian coal in the eastern Sichuan basin. The forming period and geological-geochemical factors including source region, hydrothermal fluid, volcano activities and coal accumulation environment affected on the enrichment of REY in coal will be elucidated. Linked with the basin evolution, the enrichment mechanism of REY in coal will be proposed.

英文关键词： Late Permian coal;Rare earth elements and yttrium;Enrichment mechanism;the eastern Sichuan basin