Distribution of sulfur and pyrite in coal seams from Kutai Basin (East Kalimantan, Indonesia): Implications for paleoenvironmental conditions

Widodo, Sri; Oschmann, Wolfgang; Bechtel, Achim; Sachsenhofer, Reinhard F.; Anggayana, Komang; Puettmann, W.

doi:10.1016/j.coal.2009.12.003

Cited by 72 publications

(38 citation statements)

References 25 publications

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“…Pyrites of framboidal ( Figure 8B), cell-fillings ( Figures 7A,B and 8C), cubic ( Figure 8D) and nodular ( Figure 8E) forms occur in the YLT6L coal. It is probably of syngenetic or early diagenetic origin [37][38][39][40][41]. Pyrite also occurs as cleat-and fracture-fillings ( Figures 7A and 8C), suggesting an epigenetic origin of hydrothermal solutions with a formation temperature around Kaolinite in the YLT6 coal has two modes of occurrence: as cell fillings ( Figure 7A,B) and as detrital particles ( Figure 5D).…”

Section: Coal Chemistry and Vitrinite Reflectancementioning

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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Section: Coal Chemistry and Vitrinite Reflectancementioning

confidence: 99%

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

et al. 2016

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“…It constitutes mostly traces except for one sample containing 1%. Mineral matter consisting of clay and pyrite is significantly common in Palaeogene coals (Singh et al, 2010;Widodo et al, 2010). Its content varies from 1% to 11%.…”

Section: Palaeogenementioning

confidence: 99%

“…Addison, Haryoko and Land (1982), Darman (2000), Koesoemadinata (2000), Belkin et al (2009), Geological Agency (2009 Singh et al (2010) Widodo et al (2010, Moore (2012), Moore and Nas (2013). The basin is defined to the north by the Mangkalihat High, to the south by the Adang Fault, to the west by the Kuching High and to the east by the Makassar Strait (Figure 1).…”

Section: Geologic Settingmentioning

confidence: 99%

Factors controlling petrographic composition of neogene Tenggarong coals-Kutai basin-East Kalimantan

Santoso¹

2017

IMJ

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Petrographic composition of the Neogene Tenggarong coals in the Kutai Basin-East Kalimantan indicates its geological setting. The aim of this study is to obtain an understanding of the geologic aspects controlling the petrographic composition of the coals.Variation of type and rank in the coals was determined by petrographic examination of twenty-two samples. The coals are absolutely dominated by vitrinite, common liptinite and rare inertinite and mineral matter. Vitrinite macerals are dominated by detrovitrinite and telovitrinite. Cutinite and resinite are the dominant liptinite macerals in the coals. The inertinite macerals include semifusinite, inertodetrinite and sclerotinite. Clay and pyrite are the dominant mineral matters in the coals. The type differences largely reflect climatic influence and differences in peat conditions. Rank of the coals, in general, depends largely on the stratigraphic position. Reflectance measurements on the coals indicate that there is a slightly difference in rank. The coals are sub-bituminous rank (Rvmax of 0.40-0.47%). The change in vitrinite reflectance of the coals is due to the thicker cover/overburden on the high rank coals. Nevertheless, the vitrinite reflectance is higher in some coals in the Loa Kulu area (Rvmax of 0.48-0.57%) due to its stratigraphic position that is at the bottom of the sequence. The type and rank characteristics of the coals clearly influence the utilization. The coals are suited to utilize for direct combustion and therefore, the major utilization potential would be for power generation.

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“…Sub-bituminous tertiary coal of northeast India was deposited under the influence of marine environment (Rajarathnam et al 1996). These coals have high sulfur and low ash content, with high organic sulfur, due to the influence of marine sources during diagenesis (Chandra et al 1983;Singh and Singh 2000;Ward et al 2007;Widodo et al 2010). Coal can be termed as low sulfur (\1 % sulfur content), medium sulfur (1 %-\3 % sulfur content) and high sulfur coals ([3 % sulfur content) based on their sulfur contents (Chou 2012).…”

Section: Coal Distribution and Its Characteristics In Northeast Indiamentioning

confidence: 99%

Coal mining in northeast India: an overview of environmental issues and treatment approaches

Chabukdhara

Singh

2016

Int J Coal Sci Technol

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Northeast India has a good deposit of sub-bituminous tertiary coal. The northeast Indian coals have unusual physico-chemical characteristics such as high sulfur, volatile matter and vitrinite content, and low ash content. In addition, many environmental sensitive organic and mineral bound elements such as Fe, Mg, Bi, Al, V, Cu, Cd, Ni, Pb, and Mn etc. remain enriched in these coals. Such characteristics are associated with more severe environmental impacts due to mining and its utilization in coal based industries. Environmental challenges include large scale landscape damage, soil erosion, loss of forest ecosystem and wildlife habitat, air, water and soil pollution. Several physical and chemical methods are reported in literature for the removal of mineral matter, total sulfur and different forms of sulfur from high sulfur coal in northeast India. This paper may help different researchers and stakeholders to understand current state of research in the field. Initiatives may be taken towards sustainable use of coal resources by adopting innovative clean technologies and by implementing effective control measures and regulatory policies.

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Distribution of sulfur and pyrite in coal seams from Kutai Basin (East Kalimantan, Indonesia): Implications for paleoenvironmental conditions

Cited by 72 publications

References 25 publications

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

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

Factors controlling petrographic composition of neogene Tenggarong coals-Kutai basin-East Kalimantan

Coal mining in northeast India: an overview of environmental issues and treatment approaches

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