云南干河特高有机硫煤中铼的地球化学特征及富集成因探讨

发布时间：2018-03-25 17:15

本文选题：铼　切入点：特高有机硫煤　出处：《煤炭学报》2017年10期

【摘要】：利用高分辨率电感耦合等离子质谱(ICP-MS)结合微量元素地球化学指标参数和带能谱的场发射扫描电镜(SEM-EDS)对云南干河上二叠统吴家坪组3,4号特高有机硫煤(Sod=9.03%)中铼元素(Re)的地球化学特征和富集成因进行了探讨,结果表明:Re在干河煤中高度富集,平均含量为229.14 ng/g,与世界硬煤中1 ng/g的平均含量相比,其富集系数达229.14。Re含量与灰分产率及常量元素含量的相关分析表明,3号煤层Re主要赋存于有机质中,而4号煤层除赋存在有机质中外,还存在于黏土矿物中。Sr/Ba,U/Th,Ni/Co和Vi/Ni+V地球化学指标参数表明,3,4号煤形成于受海水影响的强还原环境泥炭沼泽。干河煤中Re的富集可能更多的来自于后生阶段的热液流体,随海水入侵至煤层后被有机质还原,迁移能力减弱从而主要被有机质吸附、络合。3号煤中Re异常高富集煤分层(GH12-3,1 150 ng/g)同时也富集Co,Ni,Cu,Zn和Cd,这可能与该煤层的成煤环境和海洋微生物相关。
[Abstract]:High resolution inductively coupled plasma mass spectrometry (ICP-MS) combined with trace element geochemical parameters and field emission scanning electron microscopy (SEM-EDS) with energy spectrum was used to study the Ree of rhenium in the upper Permian Wujiaping formation of Wujiaping formation, Ganhe, Yunnan Province. The geochemical characteristics and enrichment origin were discussed. The results show that the weight re is highly enriched in the dry river coal with an average content of 229.14 ng / g, which is compared with the average content of 1 ng/g in the world hard coal. The correlation analysis of enrichment coefficient to 229.14.Re content and ash yield and constant element content shows that re mainly exists in organic matter in No. 3 coal seam, while coal seam No. 4 is located in organic matter in and around the world. The geochemical parameters of. Sr / Ba / U / T Ni / Co and Vi/Ni V in clay minerals also indicate that coal No. 3 and No. 4 were formed in peat swamps in a strongly reduced environment affected by seawater. The enrichment of re in dry river coal may come more from hydrothermal fluids in the epigenetic stage. With the seawater intrusion into the coal seam, the organic matter reduced, the migration capacity weakened, and the organic matter adsorbed mainly. Complex. Re in No. 3 coal is highly enriched in stratified coal layer GH12-3 (1 150 ng / g) and also enriched in Cu Zn and CD, which may be related to the coal forming environment and marine microorganism in this coal seam.
【作者单位】：太原理工大学矿业工程学院;太原理工大学煤与煤系气地质山西省重点实验室;中国矿业大学(北京)地球科学与测绘工程学院;
【基金】：国家重点基础研究发展计划(973)资助项目(2014CB238900) 国家自然科学基金资助项目(41402137)
【分类号】：P618.11

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