Arsenic-bearing pyrite and marcasite in the Fire Clay coal bed, Middle Pennsylvanian Breathitt Formation, eastern Kentucky

Ruppert, Leslie F.; Hower, James C.; Eble, Cortland F.

doi:10.1016/j.coal.2005.02.003

Cited by 63 publications

(30 citation statements)

References 26 publications

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“…Both iron and sulfur content in the tested minerals is poorly variable. Similar results for Fe and S content in iron sulfides from coal were obtained by Ruppert et al (2005) and Kucha & Lipiarski (1998). (+1,+2,+3,+4,+5 measurement points,FeLa,SKa,FeKa, Lead, reaching up to 1.4% in the vein forms of pyrite and marcasite, has the highest concentration out of all admixtures in pyrite and marcasite (Tab.…”

Section: The Chemical Analysis In the Micro Areasupporting

confidence: 76%

“…The element distribution map of As demonstrates at least two episodes of opening and sealing of the veins by As-poor and an As-rich pyrite (Diehl et al 2004). An electron microprobe study of a 0.04% As lithotype from the Fire Clay coal bed, eastern Kentucky by Ruppert et al (2005), has found wide variations in the concentration of As in different Fe-sulfide morphologies.In the examined hard coal from the Janina Coal Mine, only some framboidal pyrites, believed to be syngenetic framboids, were enriched in As. Mastalerz & Drobniak (2007) have observed pyriteAs associations in the Springfield and Danville coals, Indiana.…”

Section: A B C D E F G Hmentioning

confidence: 99%

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The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

Bielowicz

Misiak

2017

geol

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Samples of coal from the eastern part of the Upper Silesian Coal Basin, between Jaworzno and Libiąż, were collected from test boreholes and underground excavations in the Janina Coal Mine, southwest Poland. The No. 111-119 hard coal seams are in the upper part of the Cracow Sandstone Series (the Libiąż Beds, Westphalian D). Macroscopically, iron sulfides (pyrite and marcasite) found in hard coal seams are usually in vein and impregnation forms. On the basis of microscopic observations, the following forms of iron sulfides occurrence in the studied coal were observed: framboidal pyrite, euhedral crystals, skeletal and massive vein forms, or pocket-like (impregnation) forms. On the basis of SEM-EDS analysis and X-ray diffraction it can be stated that the iron sulfides observed in coal are a mixture of pyrite and marcasite. WDS analysis in the micro area revealed the chemical composition of sulfides. The iron sulfides contain admixtures of Pb, Hg, Zn, Cu, Au, Ag, Sb, Co, and Ni. There was no As and Cd found in the examined minerals. It has been shown that the tested iron sulfides do not include significant admixtures. There is only a slight enrichment in lead in the vein forms of sulfides. In addition to the iron sulfides, individual inclusions of galena and sphalerite within the pyrite and marcasite have been observed. When it comes to iron sulfides in the vicinity of the crystallized galena, no lead (Pb) in the pyrites can be observed.

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Section: The Chemical Analysis In the Micro Areasupporting

confidence: 76%

Section: A B C D E F G Hmentioning

confidence: 99%

The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

Bielowicz

Misiak

2017

geol

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“…In spite of the heterogeneity noted by White et al (1989), the bulk cleat infill does not apparently differ significantly in composition to the early diagenetic pyrite, suggesting a diagenetic origin for both. In some US coals it has been noted that the trace element composition of pyrite varies significantly both between samples and also within sample grains (Hower et al, 1997(Hower et al, , 2007Ruppert et al, 2005;Goldhaber et al, 2002;Diehl et al, 2004 ), which does not conflict with the conclusions of White et al (1989).…”

Section: Included Incontrasting

confidence: 51%

The geochemistry of environmentally important trace elements in UK coals, with special reference to the Parkgate coal in the Yorkshire–Nottinghamshire Coalfield, UK

Spears

Tewalt

2009

International Journal of Coal Geology

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The Parkgate coal of Langsettian age in the Yorkshire-Nottinghamshire coalfield is typical of many coals in the UK in that it has a high sulphur (S) content. Detailed information on the distribution of the forms of S, both laterally and vertically through the seam, was known from previous investigations. In the present work, 38 interval samples from five measured sections of the coal were comprehensively analysed for major, minor and trace elements and the significance of relationships established using both raw and centered logtransformed data.The major elements are used to quantify the variations in the inorganic and organic coal components and determine the trace element associations. Pyrite contains nearly all of the Hg, As, Se, Tl and Pb and is also the major source of the Mo, Ni, Cd and Sb. The clays contain the following elements in decreasing order of association: Rb, Cs, Li, Ga, U, Cr, V, Sc, Y, Bi, Cu, Nb, Sn, Te and Th. Nearly all of the Rb is present in the clay fraction, whereas for elements such as V, Cu and U, a significant amount is thought to be present in the organic matter, based on the K vs trace element regression equations. Only Ge, and possibly Be, would appear to have a dominant organic source. The trace element concentrations are 2 calculated for pyrite, the clay fraction and organic matter. For pyrite it is noted that concentrations agree with published data from the Yorkshire-Nottinghamshire coalfield and also that Tl concentrations (median of 0.33 ppm) in the pyrite are greater than either Hg or Cd. Unlike these elements, Tl has attracted less attention and possibly more information is needed on its anthropogenic distribution and impacts on man and the environment. A seawater source is thought to be responsible for the high concentrations of S, Cl and the nondetrital trace elements in the Parkgate coal. Indicative of the seawater control is the Th/U ratio, which expresses the detrital to non-detrital element contributions. Using other elements, similar ratios can be calculated, which in combination offer greater interpretative value.

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“…2 Coal from Puan Coalfield are much higher than those of coals from Guizhou of China, China, and USA. In particular, arsenic and Hg should receive much more attention not only because of their critically environmental concerns relevant to the health of plants, animals, and humans, but also of their potentially reduction through technological advances via better understanding their modes of occurrence and enrichment origins Ruppert et al, 2005;Yudovich & Ketris, 2005). Moreover, endemic poisoning caused by domestic arsenic-rich coal combustion is locally very severe in southwestern Guizhou, China.…”

Section: Concentration Of Elements In the Coals From The Puan Coalfieldmentioning

confidence: 99%

Concentrations and modes of occurrence of trace elements in the Late Permian coals from the Puan Coalfield, southwestern Guizhou, China

Yang

2006

Environ Geochem Health

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The concentration, mode of occurrence, and origin of trace elements in the Late Permian coals from the Puan Coalfield, southwestern Guizhou, China, were examined using inductively coupled plasma-mass spectrometry (ICP-MS), X-ray fluorescence (XRF), cold-vapor atomic absorption spectrometry (CV-AAS), ion-selective electrode method (ISE), sequential chemical extraction procedure (SCEP), scanning electron microscopy equipped with energy-dispersive X-ray (SEM-EDX), and optical microscope. Results show that minerals in the No. 2 Coal from the Puan Coalfield were mainly made up of epigenetic pyrite of low-temperature hydrothermal fluid origin and kaolinite of detrital terrigenous origin. Elements including As (36.9 microg/g), Cd (10.2 microg/g), Cr (167.3 microg/g), Cu (365.4 microg/g), Hg (2.82 microg/g), Mo (92.6 microg/g), Ni (82.6 microg/g), Pb (184.6 microg/g), Se (6.23 microg/g), Zn (242.3 microg/g), and U (132.7 microg/g) are significantly enriched in the No. 2 Coal from the Puan Coalfield. However, concentrations of trace elements in the other four coals, the No. 1, No. 8, No. 11, and No. 18 Coals, were close to the usual ranges found for Guizhou of China, China, and USA. Results of SEM-EDX and SCEP showed that As, Cd, Hg, Mo, Ni, Pb, and Zn occur mainly in veined pyrite, while Cr, Cu, and U distribute mainly in kaolinite, indicating that the low-temperature hydrothermal fluid and detrital materials of terrigenous origin are the main contributors to the enrichment of these trace elements in the No. 2 Coal.

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Arsenic-bearing pyrite and marcasite in the Fire Clay coal bed, Middle Pennsylvanian Breathitt Formation, eastern Kentucky

Cited by 63 publications

References 26 publications

The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

The geochemistry of environmentally important trace elements in UK coals, with special reference to the Parkgate coal in the Yorkshire–Nottinghamshire Coalfield, UK

Concentrations and modes of occurrence of trace elements in the Late Permian coals from the Puan Coalfield, southwestern Guizhou, China

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