Significant enrichment of Ga, Rb, Cs, REEs and Y in the Jurassic No. 6 coal in the Iqe Coalfield, northern Qaidam Basin, China—A hidden gem

Zhao, Cunliang; Liu, Bangjun; Xiao, Lin; Li, Yanheng; Liu, Shiming; Li, Zhongsheng; Zhao, Bao‐Heng; Ma, Jialiang; Chu, Guangchen; Gao, Pengpeng; Sun, Yuzhuang

doi:10.1016/j.oregeorev.2016.12.012

Cited by 32 publications

(24 citation statements)

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“…The valuable elements in coal seams, such as Li, Ga, Ge, REEs, etc., have been a hot point in the field of coal geology recently for their high concentrations and utilization (Dai et al, 2014;Seredin and Finkelman, 2008;Sun et al, 2012Sun et al, , 2013Zhao et al, 2017;Zhuang et al, 2006). Dai et al (2014) reviewed the geological origin, modes of occurrence, and evaluation methods of the coal-hosted rare metal deposits including Ge, Ga, U, Nb, and rare earth elements; Sun et al (2012Sun et al ( , 2013 discovered Li deposits in the coal seams in the Inner Mongolia Autonomous Region and Shanxi Province in north China.…”

Section: Introductionmentioning

confidence: 99%

“…Dai et al (2014) reviewed the geological origin, modes of occurrence, and evaluation methods of the coal-hosted rare metal deposits including Ge, Ga, U, Nb, and rare earth elements; Sun et al (2012Sun et al ( , 2013 discovered Li deposits in the coal seams in the Inner Mongolia Autonomous Region and Shanxi Province in north China. Mineralogical and geochemical study is the key to clarify the distribution, origin, modes of occurrence, and evaluation of valuable elements in coal seam (Dai et al, 2012;Singh and Singh, 1995;Sun et al, 2010Sun et al, , 2012Sun et al, , 2013Ward, 2002;Zhao et al, 2017). For example, Li in the Guanbanwusu coal mainly occurs in the chlorite (an intermediate between cookeite and chamosite), kaolinite, and possibly in illite; Ga in the same coal largely occurs in goyazite (Dai et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Mineralogy and geochemistry of the coal seam of Shanxi Formation in Guotun Mine, Juye Coalfield, North China

Zhang

Jin

Xing

et al. 2019

Energy Exploration & Exploitation

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This work investigated the mineralogy and geochemistry of the No. 3 coal seam in Permian Shanxi Formation in Guotun Mine, Juye Coalfield, north China, in order to understand the genesis of the minerals and the enrichment of trace elements. Approaches used were optical microscopy and electron probe microanalysis for minerals, X-ray fluorescence analysis for major elements and inductively coupled plasma mass spectrometry analysis for trace elements. The coal is comprised of dominant kaolinite and calcite, the claystone is characteristic of major kaolinite, montmorillonite, and proportional illite, and the sandstone contains mainly quartz and chalcedony, and a relative amount of feldspar and kaolinite. These minerals were derived dominantly from the weathered source rocks with volcanic and granitic constituents in the pre-diagenetic period, and minor from the hydrothermal deposit in the epigenetic period. The claystone is relatively enriched in Li, Cs, Be, Nb, Mo, U, Th, V, In, Pb, Bi, and Se, which may probably be controlled by the source rocks and the specific sedimentary environment. The enriched trace elements are mostly associated with minerals. Li may probably occur in montmorillonite and illite, while In, Pb, Bi, and Se occur mainly in selenio-galena.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mineralogy and geochemistry of the coal seam of Shanxi Formation in Guotun Mine, Juye Coalfield, North China

Zhang

Jin

Xing

et al. 2019

Energy Exploration & Exploitation

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“…Some rare metals can be significantly enriched in coals and coal-bearing strata under specific geological conditions [1][2][3]. In recent years, metalliferous coal deposits that contain very high concentrations of rare metals have attracted substantial attention due to the recovery potential of critical elements from them [1,2,[4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Minerals and Enrichment of W, Rb, and Cs in Late Permian Coal from Meitian Mine, Meitian Coalfield, Southern China by Magmatic Hydrothermal Fluids

et al. 2018

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We report on the effects of magmatic hydrothermal fluids on the mineralogical and geochemical compositions of 12U and 12L Coals from the Meitian Mine in the Meitian Coalfield, southern China. The minerals in 12U Coal are predominantly chlorite, quartz, and calcite, while the minerals in 12L Coal consist mainly of illite, quartz, chlorite, kaolinite, and mixed-layer illite/smectite (I/S). The vesicle- and fracture-filling illite, chlorite, I/S, pyrite, and fluorite, cleat- and fracture-filling carbonate minerals (i.e., calcite, and dolomite), and cleat-filling tremolite, diopside, and talc have epigenetic hydrothermal origins. Tremolite, diopside, and talc were probably formed from the reaction between dolomite and Si-rich magmatic hydrothermal fluids. Elevated Pb–Zn–Sn–Cd assemblages are characteristic for the 12U Coal, while 12L Coal is enriched in W, Rb, Cs, Th, V, Zn, and Zr, most notably W, Rb, and Cs. REY (Rare Earth Elements and Yttrium) plots for almost all coals, partings and host rocks are similar, showing an M-type REY distribution, Gd-maximum, positive Y anomalies, and negative Ce anomalies, suggesting acid hydrothermal circulation in the coal-bearing strata. Rubidium and cesium in the coal is clearly associated with K-rich clay minerals (illite + I/S), and to a lesser extent with silicate minerals that were precipitated from hydrothermal solutions. W in the coals mainly occurs in the inorganic constituents of illite and pyrite, especially illite. Enrichment of W, Rb, and Cs in the coal and host rocks is genetically associated with magmatic hydrothermal fluids. Specifically, magmatic hydrothermal fluids of relatively high temperatures that are rich in volatile matter can extract abundant W, Rb, and Cs from granitic melts. The enrichment of these rare metals in the coal is mainly related to illitization. Our study results suggest that, for coal intruded by magmatic rocks, the type of hydrothermal alteration may greatly influence the enrichment of elements.

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“…Late Paleozoic coal-bearing series research of Shanxi province began in the 18th century. Geologists published their own views on the stratigraphy of Carboniferous-Permianon (Buggisch et al, 2015;Chesnut, 1996;Desjardins et al, 2009;Holz et al, 2002Holz et al, , 2010Lee and Chao, 1926;Norin, 1922), the boundary division (Archbold et al, 2004;Gabriela et al, 2011;Kumpan et al, 2014;Michel et al, 2015), the palaeogeography, depositional environment, coal accumulating effect and sequence setting (Cheng, 1997;Nakazawa and Ueno, 2009;Shao et al, 2014), trace elements (Sun et al, 2012(Sun et al, , 2013a(Sun et al, , 2013bXiao et al, 2013Xiao et al, , 2016Zhao et al, 2017), tectonic (Zelazniewicz et al, 2016), climatic and biotic changes (Davydov and Biakov, 2015;Oplustil et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Re-explanation relation between limestone layers and coal seam thickness of the Taiyuan Formation in Shanxi Province

Yang

et al. 2017

Energy Exploration & Exploitation

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Based on the strata, lithologic association and coal-bearing property-using the method of synthetic correlation-the relation between limestone layers and the thick coal seam of the Taiyuan Formation in Shanxi Province has been assessed in this study. It was found that the thickness of strata decreased from southeast to southwest, the coal seam thickness was more in the north and west but less in the south and east, and the thickness of limestone increased from east to west. The negative relationship of the coal seam and limestone is associated with the direction variation of transgression, tectonic movement and sedimentary environmental. Summarized the coal seam thickness and limestone layers in the types of thick-thick, thin-thin, thick-thin. Moreover, the discussed boundary division of the Taiyuan Formation in Shanxi Province, from north to south, were lined in the bottom of the 9th coal seam in Datong-Ningwu area, the 10th coal seam in Xishan area, the 11th coal seam in the west of Huozhou-Qinshui area, and the 16th coal seam in the Qinshui Basin.

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Significant enrichment of Ga, Rb, Cs, REEs and Y in the Jurassic No. 6 coal in the Iqe Coalfield, northern Qaidam Basin, China—A hidden gem

Cited by 32 publications

References 41 publications

Mineralogy and geochemistry of the coal seam of Shanxi Formation in Guotun Mine, Juye Coalfield, North China

Mineralogy and geochemistry of the coal seam of Shanxi Formation in Guotun Mine, Juye Coalfield, North China

Minerals and Enrichment of W, Rb, and Cs in Late Permian Coal from Meitian Mine, Meitian Coalfield, Southern China by Magmatic Hydrothermal Fluids

Re-explanation relation between limestone layers and coal seam thickness of the Taiyuan Formation in Shanxi Province

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