Mineralogical and geochemical compositions of the Pennsylvanian coal in the Hailiushu Mine, Daqingshan Coalfield, Inner Mongolia, China: Implications of sediment-source region and acid hydrothermal solutions

Dai, Shifeng; Li, Tianjiao; Jiang, Yaofa; Ward, Colin R.; Hower, James C.; Sun, Jihua; Liu, Jingjing; Song, Hongjian; Wei, Jianpeng; Li, Qingqian; Xie, Panpan; Huang, Qing

doi:10.1016/j.coal.2014.11.010

Cited by 148 publications

(74 citation statements)

References 41 publications

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“…The confident level of mercury occurrence in coal was estimated 6 out of 10 (Finkelman 1994). It is generally considered that mercury can be presented in coal as sulfide and selenides, in forms associated with pyrite and marcasite (Ward et al 1999;Hower et al 2008;Kolker 2012), calcite and chlorite (Zhang et al 2002), selenio-galena (Dai et al 2006b(Dai et al , 2015, clausthalite (Hower and Robertson 2003), kleinite and cinnabar (Brownfield et al 2005), sphalerite (HgFeS 2 ) and getchellite (Dai et al 2006a). It can also organically bounded to organic matter (HgOM) (Rumayor et al 2015), or even as HgS and metallic mercury (Hg 0 ) (Finkelman 1994;Yudovich and Ketris 2005).…”

Section: Introductionmentioning

confidence: 99%

The distribution and occurrence of mercury in Chinese coals

Bai

Wang

et al. 2017

Int J Coal Sci Technol

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Mercury is one of the most concerned hazardous elements in coals. 1018 coal samples of different coal-forming periods, coal-accumulating areas and coal ranks all over the country were collected to study the distributions of mercury in Chinese coals. The modes of occurrence of mercury were studied with float-sink experiments of 10 coals from different basins in China and correlation analyses were conducted between concentrations of mercury and maceral and sulfur contents, as well as the ash yield. The theoretic concentrations and affinities of mercury in vitrinite, inertinite, clay and pyrite were then calculated following the methods proposed by Solari. The weighted average concentration of mercury in Chinese coals is 0.154 lg/g, which is similar to that in the word coals in general. The mercury concentrations vary largely in the coals of different coal-forming period and coal-accumulating areas as geological settings play key roles in determining the geochemistry of mercury. The concentrations of mercury in coals from south and southwest China and those from North China of C 3 -P 1 are relatively higher while those from North China of J 1-2 and Northeast of J 3 -K 1 relatively lower. The general distribution trends of mercury are very similar to that of ash yield, sulfur contents in coals. Pyrite is the dominant carrier of mercury in most coals, especially in some high-sulfur coals with abundant epigenetic pyrite formed during diagenesis and metamorphism. Mercury has higher affinity to vitrinite than to inertinite in most coals, which accords with the geological origin of macerals and geochemistry of mercury.

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Section: Introductionmentioning

confidence: 99%

The distribution and occurrence of mercury in Chinese coals

Bai

Wang

et al. 2017

Int J Coal Sci Technol

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“…Meanwhile, in Shengli coal of Inner Mongolia, elemental F was found in illite and the illite smectite mixed layer (IS), which was verified by the strong positive correlations between F and ash yield, SiO 2 , Al 2 O 3 , and K 2 O (r > 0.95) [62]. The F in Daqingshan coal is slightly enriched (2 < CC < 5), has similar concentrations as Ga, V, Cu, Se, and Mo, and has positive correlations with ash, SiO 2 , and Al 2 O 3 (r = 0.93) [42], the primary minerals in coal are quartz and kaolinite [33,34,46], elemental F found in kaolinite and elemental F in Wulantuga coal was also adsorbed on clay minerals and was verified by statistical analysis (with positive correlations between F and ash, Al 2 O 3 , SiO 2 , and K 2 O) [44]. The same occurred in Guanbanwusu [45] and Haerwusu coal [46], where fluorine was found in kaolinite and boehmite.…”

Section: Modes Of Fluorine Occurrence In Coalmentioning

confidence: 53%

“…The elements V, Cr, Co, Ni, and Cu are enriched, the F is depleted in coal with a value of 51.2 mg/kg, and it has a positive correlation with P 2 O 5 , suggesting that F is associated with P-minerals [52]. In addition, Yangchang coal [9], Laochang coal [7], Enhong coal, Fuyuan coal [21], and Songshan coal [42] are F-enriched.…”

Section: Yunnan and Guizhou Coal Producing Areamentioning

confidence: 99%

“…Most of it was adsorbed on minerals, and the rest was in solution or substituted in minerals structures. According to recent reports, most of the fluorine in coal was adsorbed [24,27,28,37,42,43]. Studies on Songzao coal from Chongqing found that F, together with Ga, Sn, U, Th, Zr, Hf, and Ta, had positive correlations with Al 2 O 3 , suggesting that fluorine occurred in clay minerals (kaolinite and others) [19,61].…”

Section: Modes Of Fluorine Occurrence In Coalmentioning

confidence: 99%

“…In the Hailiushu mine, which is situated in the southwest of Daqingshan coalfield, and the recoverable coal seam was Cu2 coal (CP2 coal in Adaohai) with mean F concentration of 179.0 mg/kg. It has an even vertical distribution and the modes of F occurrence are mainly inorganic, according to the correlation coefficients between F and ash yield, SiO 2 , and Al 2 O 3 (r = 0.93) [42].…”

Section: Daqingshan Coalfieldmentioning

confidence: 99%

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Fluorine in Chinese Coal: A Review of Distribution, Abundance, Modes of Occurrence, Genetic Factors and Environmental Effects

et al. 2017

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Fluorine, a hazard that is associated with coal, has resulted in serious environmental issues during the production and utilization of coal. In this paper, we provide a detailed review of fluorine in Chinese coal, including the distribution, concentration, modes of occurrence, genetic factors, and environmental effects. The average concentration of fluorine in Chinese coal is 130.0 mg/kg, which is slightly higher than coal worldwide (88.0 mg/kg). The enrichment of fluorine in Chinese coal varies across different coal deposit regions, and it is especially high in Inner Mongolia (Junger coalfield, Daqingshan coalfield) and southwest China (coal mining regions in Yunnan, Guizhou province). The fluorine distribution is uneven, with a relatively high content in southwest coal (including Yunnan, Guizhou, Chongqing, and Sichuan provinces), very high content in the coal of North China (Inner Mongolia) and South China (Guangxi), and is occasionally found in the northwest (Qinghai). Fluorine occurs in various forms in coal, such as independent minerals (fluorine exists as fluorapatite or fluorite in coal from Muli of Qinghai, Taoshuping of Yunnan, Guiding of Guizhou, and Daqingshan of Inner Mongolia), adsorption on minerals (fluorine in coal from Nantong, Songzao of Chongqing, Guxu of Sichuan, and Shengli, Daqingshan, and Junger from Inner Mongolia), substitution in minerals (Wuda coal, Inner Mongolia), and a water-soluble form (Haerwusu coal, Inner Mongolia). The enrichment of fluorine is mainly attributed to the weathering of source rock and hydrothermal fluids; in addition to that, volcanic ash, marine water influence, and groundwater affect the fluorine enrichment in some cases. Some environmental and human health problems are related to fluorine in coal, such as damage to the surrounding environment and husbandry (poisoning of livestock) during the coal combustion process, and many people have suffered from fluorosis due to the burning of coal (endemic fluorosis in southwest China).

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Analysing of palaeoenvironment and organic matter enrichment: A case study from the Triassic Yanchang Formation in the southern Ordos Basin, China

Yang,

Li,

et al. 2023

Geological Journal

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The organic‐rich shale of the seventh Oil Member (Chang 7 Member for short) of the Middle‐Late Triassic Yanchang Formation is extensively distributed in the southern margin of the Ordos Basin. Understanding the palaeoenvironmental conditions during the sedimentary period of the Chang 7 Member is crucial to exploring the main factors that control the enrichment of organic matter in high‐quality source rocks. In this study, lithofacies analysis was conducted, and samples were collected from the N36 well located in the southern part of the Ordos Basin. Subsequently, element geochemical analysis was performed to reconstruct the palaeoenvironment, and total organic carbon (TOC) tests were conducted to analyse the characteristics of organic matter enrichment. The findings indicate that the sedimentary period of the Chang 7 Member was characterized by a relatively warm and humid palaeo‐climate and a brackish water environment with oxygen‐poor or sub‐oxygen‐rich conditions, and a gradual decrease in palaeo‐water depth. The parent rock types were mainly felsic igneous rock and intermediate igneous rock, which provide limited nutritional elements for primary producers. The enrichment of organic matter in the Chang 7 Member is influenced by several factors, mainly including palaeo‐salinity, palaeo‐water depth, palaeo‐redox conditions, terrestrial inputs, and palaeo‐climate. The warm and humid palaeo‐climate, higher palaeo‐productivity, relatively higher palaeo‐salinity, lower terrigenous input, deeper palaeo‐water depth, and better preservation conditions are conducive to the development of high‐quality source rock in the Chang 7 Member.

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Mineralogical and geochemical compositions of the Pennsylvanian coal in the Hailiushu Mine, Daqingshan Coalfield, Inner Mongolia, China: Implications of sediment-source region and acid hydrothermal solutions

Cited by 148 publications

References 41 publications

The distribution and occurrence of mercury in Chinese coals

The distribution and occurrence of mercury in Chinese coals

Fluorine in Chinese Coal: A Review of Distribution, Abundance, Modes of Occurrence, Genetic Factors and Environmental Effects

Analysing of palaeoenvironment and organic matter enrichment: A case study from the Triassic Yanchang Formation in the southern Ordos Basin, China

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