Distribution and origin of minerals in high-rank coals of the South Walker Creek area, Bowen Basin, Australia

Permana, Asep Kurnia; Ward, Colin R.; Li, Zhongsheng; Gurba, Lila W.

doi:10.1016/j.coal.2013.03.001

Cited by 111 publications

(65 citation statements)

References 43 publications

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“…The phosphorus precipitated in this way may have been released from decay of the peat-forming plant tissues, or possibly from contemporaneously input of volcanic material. Apatite in some other coals may also occur as cleat-and fracture-fillings; these may either be formed by migration of low-temperature solutions (Davis et al, 2006;Permana et al, 2013), or from local remobilization of phosphate formed earlier within the coal seam or associated strata (Ward et al, 1996;Dai et al, 2015d).…”

Section: Modes Of Occurrence Of Minerals In Coalmentioning

confidence: 98%

Enrichment of U-Re-V-Cr-Se and rare earth elements in the Late Permian coals of the Moxinpo Coalfield, Chongqing, China: Genetic implications from geochemical and mineralogical data

Dai

Xie

Jia

et al. 2017

Ore Geology Reviews

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206

135

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Section: Modes Of Occurrence Of Minerals In Coalmentioning

confidence: 98%

Enrichment of U-Re-V-Cr-Se and rare earth elements in the Late Permian coals of the Moxinpo Coalfield, Chongqing, China: Genetic implications from geochemical and mineralogical data

Dai

Xie

Jia

et al. 2017

Ore Geology Reviews

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206

135

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“…Al-and Si-bearing solutions from the sediment-source Kangdian Upland region precipitated in the cells of coal-forming plants during coal formation. Although chlorite (e.g., chamosite) is rare in coals, if present, it is usually observed in high-rank coals or in coals influenced by epigenetic hydrothermal solutions [44,50,51]. Chamosite is present in the YLT6 coal and coexists with kaolinite and quartz ( Figure 13D,E) in the roof strata.…”

Section: Multi-stage Injections Of Hydrothermal Fluidsmentioning

confidence: 99%

Mineralogical Characteristics of Late Permian Coals from the Yueliangtian Coal Mine, Guizhou, Southwestern China

et al. 2016

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This paper reports the mineralogical compositions of super-low-sulfur (Yueliangtian 6-upper (YLT6U)) and high-sulfur (Yueliangtian 6-lower (YLT6L)) coals of the Late Permian No. 6 coal seam from the Yueliangtian coal mine, Guizhou, southwestern China. The mineral assemblages and morphology were detected and observed by X-ray diffractogram (XRD), optical microscopy and field-emission scanning electron microscope (FE-SEM) in conjunction with an energy-dispersive X-ray spectrometer. Major minerals in the coal samples, partings and host rocks (roof and floor strata) include calcite, quartz, kaolinite, mixed-layer illite/smectite, chlorite and pyrite and, to a lesser extent, chamosite, anatase and apatite. The Emeishan basalt and silicic rocks in the Kangdian Upland are the sediment source for the Yueliangtian coals. It was found that there are several modes of chamosite occurrence, and precursor minerals, such as anatase, had been corroded by Ti-rich hydrothermal solutions. The modes of occurrence of minerals present in the coal were controlled by the injection of different types of hydrothermal fluids during different deposition stages. The presence of abundant pyrite and extremely high total sulfur contents in the YLT6L coal are in sharp contrast to those in the YLT6U coal, suggesting that seawater invaded the peat swamp of the YLT6L coal and terminated at the YLT6U-9p sampling interval. High-temperature quartz, vermicular kaolinite and chloritized biotite were observed in the partings and roof strata. The three partings and floor strata of the No. 6 coal seam from the Yueliangtian coal mine appear to have been derived from felsic volcanic ash. Four factors, including sediment-source region, multi-stage injections of hydrothermal fluids, seawater influence and volcanic ash input, were responsible for the mineralogical characteristics of the Yueliangtian coals.

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“…The presence of both illite (or I/S) and kaolinite in some of the fan-like aggregates, however, as shown by the presence of light-colored crystals in Fig. 2B, 2C (the particle around Z2) and 2D, may indicate either formation of kaolinite from an illite-rich precursor, or possibly formation of illite or I/S by interaction of kaolinite with K + and other ions in fluids permeating at a later stage through the peat bed or the coal seam (Dai and Chou, 2007;Permana et al, 2013). Experimental studies by Small (1993) suggest that both illite and kaolinite may be precipitated from formation fluids in sandstones, depending in part on the concentration of oxalate and similar carboxylic acid anions in the geochemical system, so that co-precipitation within the peat bed is also a possibility.…”

Section: Modes Of Clay Mineral Occurrence In Coalsmentioning

confidence: 92%

Vermicular kaolinite relics in fly ash derived from Bokaro and Jharia coals (Jharkhand, India)

Valentim

Flores

Guedes

et al. 2016

International Journal of Coal Geology

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Distribution and origin of minerals in high-rank coals of the South Walker Creek area, Bowen Basin, Australia

Cited by 111 publications

References 43 publications

Enrichment of U-Re-V-Cr-Se and rare earth elements in the Late Permian coals of the Moxinpo Coalfield, Chongqing, China: Genetic implications from geochemical and mineralogical data

Enrichment of U-Re-V-Cr-Se and rare earth elements in the Late Permian coals of the Moxinpo Coalfield, Chongqing, China: Genetic implications from geochemical and mineralogical data

Mineralogical Characteristics of Late Permian Coals from the Yueliangtian Coal Mine, Guizhou, Southwestern China

Vermicular kaolinite relics in fly ash derived from Bokaro and Jharia coals (Jharkhand, India)

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