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Strontium isotopes in high- and low-Ge coals from the Shengli Coalfield, Inner Mongolia, northern China: New indicators for Ge source

文献类型：期刊论文

作者Liu, Jingjing2,4; Spiro, Baruch F.2,3,5; Dai, Shifeng2,4; French, David6; Graham, Ian T.6; Wang, Xibo2,4; Zhao, Lei2,4; Zhao, Jingtao2,4; Zeng, Rongshu1
刊名INTERNATIONAL JOURNAL OF COAL GEOLOGY
出版日期2021
卷号233页码:11
关键词Germanium in coal Strontium isotopes Wulantuga Ge deposit Grantic Ge source
ISSN号0166-5162
DOI10.1016/j.coal.2020.103642
英文摘要The coal-hosted Ge deposit (Early Cretaceous) at Wulantuga, Inner Mongolia, northern China, is one of the largest Ge deposits in the world. Although the origin, modes of occurrence, and spatial distribution of Ge in this deposit have been investigated by several studies, the provenance and pathways of Ge from the source to the deposit are largely unknown. In this study, we investigated the Sr-87/Sr-86 values in the high-Ge coal of the Wulantuga deposit and the stratigraphically-equivalent low-Ge coal of the No. 1 Pit, both from the Shengli Coalfield, Inner Mongolia, northern China. In addition to an organic association, Sr and Ca in the high-Ge and low-Ge coals also occur in gypsum. The water-soluble Sr (i.e., in gypsum) in the high-Ge coal (Ge concentrations: 45-1170 ppm, 273 ppm on average, whole coal basis) has Sr-87/Sr-86 values in the range of 0.710411 to 0.710633 (with an average of 0.710478). In contrast, the low-Ge coal (Ge concentrations: up to 4.23 ppm, 0.45 ppm on average, whole coal basis) has lower Sr-87/Sr-86 values in two sub-groups, a low range of 0.709896-0.71005 (with an average of 0.709736) and a high range of 0.710173-0.710547 (with an average of 0.710329 and dominantly in the range of 0.710173-0.710406). The higher Sr-87/Sr-86 values in the high-Ge coals indicate that the highly elevated concentration of Ge is associated with a local source of radiogenic Sr. The enrichment of Ge in the coal is due to several consecutive processes. Surface waters penetrated deeply into granite and dissolved at least partially more soluble phases of the granite. The Ge-rich solution flowed over ground or underground into the Shengli Coalfield and Ge precipitated in the peat, the precursor of the coal investigated in the coalfield. The Sr-87/Sr-86 values of the water-soluble fraction, the elemental compositions of high-Ge and low-Ge coals, and the geomorphological setting of the coalfield point to the Hercynian granodiorite intrusion on the nearby SE margin of the Shengli Coalfield as the primary source of Ge in the Wulantuga coal-hosted Ge deposit. In addition to serving as an indicator of the mode of formation of the coal-hosted Ge deposit, the Sr-87/Sr-86 values and their spatial distribution can provide an indication for the hydrological pathways of the mineralising fluid.
WOS关键词TRACE-ELEMENTS ; GERMANIUM DEPOSIT ; YUNNAN PROVINCE ; MINERAL MATTER ; FLY-ASH ; GEOCHEMISTRY ; SR ; LIGNITE ; WATER ; AFFINITIES
资助项目National Natural Science Foundation of China[91962220] ; National Natural Science Foundation of China[41902164] ; National Natural Science Foundation of China[U1810202] ; National Natural Science Foundation of China[41672151] ; 111 Project[B17042]
WOS研究方向Energy & Fuels ; Geology
语种英语
WOS记录号WOS:000603540600002
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; 111 Project ; 111 Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; 111 Project ; 111 Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; 111 Project ; 111 Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; 111 Project ; 111 Project
源URL[http://ir.iggcas.ac.cn/handle/132A11/99970]  
专题地质与地球物理研究所_离退休科研人员
通讯作者Dai, Shifeng
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
2.China Univ Min & Technol, State Key Lab Coal Resources & Safe Min, Beijing 100083, Peoples R China
3.Univ Haifa, Sch Marine Sci, Haifa, Israel
4.China Univ Min & Technol, Coll Geosci & Survey Engn, Beijing 100083, Peoples R China
5.Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England
6.Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW, Australia
推荐引用方式
GB/T 7714		 Liu, Jingjing,Spiro, Baruch F.,Dai, Shifeng,et al. Strontium isotopes in high- and low-Ge coals from the Shengli Coalfield, Inner Mongolia, northern China: New indicators for Ge source[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2021,233:11.
APA Liu, Jingjing.,Spiro, Baruch F..,Dai, Shifeng.,French, David.,Graham, Ian T..,...&Zeng, Rongshu.(2021).Strontium isotopes in high- and low-Ge coals from the Shengli Coalfield, Inner Mongolia, northern China: New indicators for Ge source.INTERNATIONAL JOURNAL OF COAL GEOLOGY,233,11.
MLA Liu, Jingjing,et al."Strontium isotopes in high- and low-Ge coals from the Shengli Coalfield, Inner Mongolia, northern China: New indicators for Ge source".INTERNATIONAL JOURNAL OF COAL GEOLOGY 233(2021):11.

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来源：地质与地球物理研究所

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