Petrography, geochemistry and palynology of the Stockton coal bed (Middle Pennsylvanian), Martin County, Kentucky

Hower, James C.; Eble, Cortland F.; Pierce, Brenda S.

doi:10.1016/s0166-5162(96)00017-1

Cited by 15 publications

(13 citation statements)

References 7 publications

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“…Ba, Sr, As, and Th also have strong correlations with CaO, and they have a carbonate affinity. with P2O5 are rBe = 0.68, rGa = 0.61, rAs = 0.78, rSr = 0.99, rBa = 0.99, and rTh = 0.66, indicating that P2O5 and these elements are probably associated with phosphate minerals (goyazite, apatite, and florencite in coal samples), which were detected by previous investigations [35][36][37]. Ba, Sr, As, and Th also have strong correlations with CaO, and they have a carbonate affinity.…”

Section: Geochemical Associations In the Coal Samplessupporting

confidence: 55%

Modes of Occurrence and Abundance of Trace Elements in Pennsylvanian Coals from the Pingshuo Mine, Ningwu Coalfield, Shanxi Province, China

et al. 2016

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Abstract:The Pingshuo Mine is an important coal mine of the Ningwu coalfield in northern Shanxi Province, China. To investigate the mineralogy and geochemistry of Pingshuo coals, core samples from the mineable No. 4 coals were collected. The minerals, major element oxides, and trace elements were analyzed by scanning electron microscopy (SEM), LTA-XRD in combination with Siroquant software, X-ray fluorescence (XRF), inductively coupled plasma mass spectrometry (ICP-MS) and ICP-CCT-MS (As and Se). The minerals in the Pennsylvanian coals from the Pingshuo Mine dominantly consist of kaolinite and boehmite, with minor amounts of siderite, anatase, goyazite, calcite, apatite and florencite. Major-element oxides including SiO 2 (9.54 wt %), Al 2 O 3 (9.68 wt %), and TiO 2 (0.63 wt %), as well as trace elements including Hg (449.63 ng/g), Zr (285.95 µg/g), Cu (36.72 µg/g), Ga (18.47 µg/g), Se (5.99 µg/g), Cd (0.43 µg/g), Hf (7.14 µg/g), and Pb (40.63 µg/g) are enriched in the coal. Lithium and Hg present strong positive correlations with ash yield and SiO 2 , indicating an inorganic affinity. Elements Sr, Ba, Be, As and Ga have strong positive correlations with CaO and P 2 O 5 , indicating that most of these elements may be either associated with phosphates and carbonates or have an inorganic-organic affinity. Some of the Zr and Hf may occur in anatase due to their strong positive correlations with TiO 2 .

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Section: Geochemical Associations In the Coal Samplessupporting

confidence: 55%

Modes of Occurrence and Abundance of Trace Elements in Pennsylvanian Coals from the Pingshuo Mine, Ningwu Coalfield, Shanxi Province, China

et al. 2016

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“…The palynology, petrography, and geochemistry of the Stockton coal bed have previously been discussed by Eble and Grady (1993) and Hower et al (1996). Figure 9 illustrates palynologic, petrographic, and geochemical variation within the Stockton coal for four sample sites previously collected by Hower et al (1996) in the study area.…”

Section: Palynology Petrography and Geochemistrymentioning

confidence: 92%

“…Figure 9 illustrates palynologic, petrographic, and geochemical variation within the Stockton coal for four sample sites previously collected by Hower et al (1996) in the study area. Compositional group analyses of four sites indicates the existence of three compositional groups.…”

Section: Palynology Petrography and Geochemistrymentioning

confidence: 99%

“…Figure 9. Composition of the Stockton coal at four sample locations (data from Hower et al, 1996). Each division reflects a sample interval.…”

Section: Palynology Petrography and Geochemistrymentioning

confidence: 99%

“…It is logical to infer that the midseam parting is equivalent to the highest ash durains at the four sample sites (Fig. 10) collected by Hower et al (1996), which are all in a similar position in the coal. Because there was one obvious MPHA increment at all sites, it was treated separately, and benches were defined informally above and below this persistent high-ash durain increment (Fig.…”

Section: Bench-scale Comparisonsmentioning

confidence: 99%

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Subtle structural influences on coal thickness and distribution: Examples from the Lower Broas–Stockton coal (Middle Pennsylvanian), Eastern Kentucky Coal Field, USA

Greb¹,

Eble²,

Hower³

2005

Coal Systems Analysis

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The Lower Broas-Stockton coal is a heavily mined coal of the Central Appalachian Basin. Coal thickness, distribution, composition, and stratigraphic position were compared with basement structure, gas and oil field trends, and sequence stratigraphic and paleoclimate interpretations to better understand the geology of the Stockton coal bed in eastern Kentucky. The thickest coal occurs south of the Warfield structural trend and east of the Paint Creek Uplift, two basement-related structures. Along the Warfield trend, coal beds in the underlying Peach Orchard coal zone locally merge with the Stockton coal to form a seam more than 3 m thick. Other areas of thick coal occur in elongate trends. Two pairs of elongate, conjugate trends in Stockton coal thickness are interpreted as regional paleofractures that influenced paleotopography and groundwater during peat accumulation.Compositional group analyses indicate that the Stockton peat infilled depressions in the paleotopography as a topogenous to soligenous mire codominated by tree ferns and lycopsid trees. Flooding from adjacent paleochannels is indicated by partings and seam splits along the margins of the mineable coal body. One or more increments of low-vitrinite coal, dominated by tree ferns and shrubby, Densosporites-producing lycopsids occur at all sample sites. Similar assemblages have been previously used to identify ombrogenous, domed mire origins for Early and Middle Pennsylvanian coals in which ash yields were less than 10%. It is difficult, however, to reconcile ombrogenous conditions with the partings in the Stockton coal in this area. Low-ash, low-vitrinite increments may have been formed in topogenous to soligenous mires with periodic drying or water-table fluctuations, rather than widespread doming. This is consistent with interpretations of increasingly seasonal paleoclimates in the late Middle and Late Pennsylvanian and fracture-influenced groundwater conditions.

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Characterization of lignite deposits of Barmer Basin, Rajasthan: insights from mineralogical and elemental analysis

Kumar

Gopinathan

Naik

et al. 2023

Environ Geochem Health

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Petrography, geochemistry and palynology of the Stockton coal bed (Middle Pennsylvanian), Martin County, Kentucky

Cited by 15 publications

References 7 publications

Modes of Occurrence and Abundance of Trace Elements in Pennsylvanian Coals from the Pingshuo Mine, Ningwu Coalfield, Shanxi Province, China

Modes of Occurrence and Abundance of Trace Elements in Pennsylvanian Coals from the Pingshuo Mine, Ningwu Coalfield, Shanxi Province, China

Subtle structural influences on coal thickness and distribution: Examples from the Lower Broas–Stockton coal (Middle Pennsylvanian), Eastern Kentucky Coal Field, USA

Characterization of lignite deposits of Barmer Basin, Rajasthan: insights from mineralogical and elemental analysis

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