Notes on the origin of altered macerals in the Ragged Edge of the Pennsylvanian (Asturian) Herrin coalbed, Western Kentucky

Bruno Valentim; James C. Hower; Jennifer M.K. O'Keefe; Sandra Rodrigues; Joana Ribeiro; Alexandra Guedes

doi:10.1016/j.coal.2013.05.001

Notes on the origin of altered macerals in the Ragged Edge of the Pennsylvanian (Asturian) Herrin coalbed, Western Kentucky

Bruno Valentim, James C. Hower, Jennifer M.K. O'Keefe, Sandra Rodrigues, Joana Ribeiro, Alexandra Guedes

Earth and Environmental Sciences

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The Ragged Edge of the Herrin (Western Kentucky No. 11) coal bed has a variety of maceral textures and assemblages that do not fit in the conventional vitrinite and inertinite definitions as established by the International Committee for Coal & Organic Petrology. Within a narrow zone at the marine margin of the coalbed, the coal is brecciated and cemented by carbonate with some of the brecciated clasts metamorphosed to anthracite-level vitrinite reflectances. This is in contrast to the ambient high volatile C bituminous coal rank in the region. Low-rank peat-like textures are preserved in the clasts, suggesting that the metamorphism took place soon after deposition of the peat. Geochemical and mineralogical evidences suggest that the increase in reflectance was the consequence of the channeling of hydrothermal fluids through the breccia. The narrow zone of metamorphism and, further, the juxtaposition of breccia clasts of varying degrees of metamorphism suggest that the hydrothermal influx occurred at shallow depths of burial, perhaps shortly following deposition of the peat.

Original language	English
Pages (from-to)	24-40
Number of pages	17
Journal	International Journal of Coal Geology
Volume	115
DOIs	https://doi.org/10.1016/j.coal.2013.05.001
State	Published - Aug 1 2013

Bibliographical note

Funding Information:
The samples for the first study of the Ragged Edge of the Herrin coalbed were logged in on 25 August 1983. The results of that study were presented at the first meeting of The Society for Organic Petrology in 1984 and published as part of the collected papers of that conference as Hower et al. (1987) . In the 30 years of investigating this sequence throughout the Western Kentucky coalfield, we have been fortunate to be able to collaborate with a number of coal companies including Island Creek Coal and Pyro Coal, both defunct, and Alliance Coal. Our collaborators include Eric Trinkle (now Delaware Department of Natural Resources), Anne Graese (Illinois), Gary Neuder (Louisiana), Carol and Andy de Wet (Franklin & Marshall College), Sean Brennan (US Geological Survey), Steve Moshier (Wheaton College), Anne Raymond (Texas A&M), John Popp (Natural Resource Partners), Mike Shultz (EOG Resources), and Sue Rimmer (Southern Illinois University, Carbondale). Mike McClure (currently with Marshall Miller & Associates) supplied the core samples for the de Wet et al. (1997) study when he was employed by Island Creek Coal Co. The Portuguese authors would like to thank FEDER through the Program COMPETE, FCT project “PEst-OE/CTE/UI0039/201-UI 39” and Ciência 2007 Program.

Keywords

Carbonate
Coal metamorphism
Geochemistry
Hydrothermal
Marine margin

ASJC Scopus subject areas

Fuel Technology
Geology
Economic Geology
Stratigraphy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.coal.2013.05.001

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title = "Notes on the origin of altered macerals in the Ragged Edge of the Pennsylvanian (Asturian) Herrin coalbed, Western Kentucky",

abstract = "The Ragged Edge of the Herrin (Western Kentucky No. 11) coal bed has a variety of maceral textures and assemblages that do not fit in the conventional vitrinite and inertinite definitions as established by the International Committee for Coal & Organic Petrology. Within a narrow zone at the marine margin of the coalbed, the coal is brecciated and cemented by carbonate with some of the brecciated clasts metamorphosed to anthracite-level vitrinite reflectances. This is in contrast to the ambient high volatile C bituminous coal rank in the region. Low-rank peat-like textures are preserved in the clasts, suggesting that the metamorphism took place soon after deposition of the peat. Geochemical and mineralogical evidences suggest that the increase in reflectance was the consequence of the channeling of hydrothermal fluids through the breccia. The narrow zone of metamorphism and, further, the juxtaposition of breccia clasts of varying degrees of metamorphism suggest that the hydrothermal influx occurred at shallow depths of burial, perhaps shortly following deposition of the peat.",

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author = "Bruno Valentim and Hower, {James C.} and O'Keefe, {Jennifer M.K.} and Sandra Rodrigues and Joana Ribeiro and Alexandra Guedes",

note = "Funding Information: The samples for the first study of the Ragged Edge of the Herrin coalbed were logged in on 25 August 1983. The results of that study were presented at the first meeting of The Society for Organic Petrology in 1984 and published as part of the collected papers of that conference as Hower et al. (1987) . In the 30 years of investigating this sequence throughout the Western Kentucky coalfield, we have been fortunate to be able to collaborate with a number of coal companies including Island Creek Coal and Pyro Coal, both defunct, and Alliance Coal. Our collaborators include Eric Trinkle (now Delaware Department of Natural Resources), Anne Graese (Illinois), Gary Neuder (Louisiana), Carol and Andy de Wet (Franklin & Marshall College), Sean Brennan (US Geological Survey), Steve Moshier (Wheaton College), Anne Raymond (Texas A&M), John Popp (Natural Resource Partners), Mike Shultz (EOG Resources), and Sue Rimmer (Southern Illinois University, Carbondale). Mike McClure (currently with Marshall Miller & Associates) supplied the core samples for the de Wet et al. (1997) study when he was employed by Island Creek Coal Co. The Portuguese authors would like to thank FEDER through the Program COMPETE, FCT project “PEst-OE/CTE/UI0039/201-UI 39” and Ci{\^e}ncia 2007 Program. ",

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AU - Hower, James C.

AU - O'Keefe, Jennifer M.K.

AU - Rodrigues, Sandra

AU - Ribeiro, Joana

AU - Guedes, Alexandra

N1 - Funding Information: The samples for the first study of the Ragged Edge of the Herrin coalbed were logged in on 25 August 1983. The results of that study were presented at the first meeting of The Society for Organic Petrology in 1984 and published as part of the collected papers of that conference as Hower et al. (1987) . In the 30 years of investigating this sequence throughout the Western Kentucky coalfield, we have been fortunate to be able to collaborate with a number of coal companies including Island Creek Coal and Pyro Coal, both defunct, and Alliance Coal. Our collaborators include Eric Trinkle (now Delaware Department of Natural Resources), Anne Graese (Illinois), Gary Neuder (Louisiana), Carol and Andy de Wet (Franklin & Marshall College), Sean Brennan (US Geological Survey), Steve Moshier (Wheaton College), Anne Raymond (Texas A&M), John Popp (Natural Resource Partners), Mike Shultz (EOG Resources), and Sue Rimmer (Southern Illinois University, Carbondale). Mike McClure (currently with Marshall Miller & Associates) supplied the core samples for the de Wet et al. (1997) study when he was employed by Island Creek Coal Co. The Portuguese authors would like to thank FEDER through the Program COMPETE, FCT project “PEst-OE/CTE/UI0039/201-UI 39” and Ciência 2007 Program.

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N2 - The Ragged Edge of the Herrin (Western Kentucky No. 11) coal bed has a variety of maceral textures and assemblages that do not fit in the conventional vitrinite and inertinite definitions as established by the International Committee for Coal & Organic Petrology. Within a narrow zone at the marine margin of the coalbed, the coal is brecciated and cemented by carbonate with some of the brecciated clasts metamorphosed to anthracite-level vitrinite reflectances. This is in contrast to the ambient high volatile C bituminous coal rank in the region. Low-rank peat-like textures are preserved in the clasts, suggesting that the metamorphism took place soon after deposition of the peat. Geochemical and mineralogical evidences suggest that the increase in reflectance was the consequence of the channeling of hydrothermal fluids through the breccia. The narrow zone of metamorphism and, further, the juxtaposition of breccia clasts of varying degrees of metamorphism suggest that the hydrothermal influx occurred at shallow depths of burial, perhaps shortly following deposition of the peat.

AB - The Ragged Edge of the Herrin (Western Kentucky No. 11) coal bed has a variety of maceral textures and assemblages that do not fit in the conventional vitrinite and inertinite definitions as established by the International Committee for Coal & Organic Petrology. Within a narrow zone at the marine margin of the coalbed, the coal is brecciated and cemented by carbonate with some of the brecciated clasts metamorphosed to anthracite-level vitrinite reflectances. This is in contrast to the ambient high volatile C bituminous coal rank in the region. Low-rank peat-like textures are preserved in the clasts, suggesting that the metamorphism took place soon after deposition of the peat. Geochemical and mineralogical evidences suggest that the increase in reflectance was the consequence of the channeling of hydrothermal fluids through the breccia. The narrow zone of metamorphism and, further, the juxtaposition of breccia clasts of varying degrees of metamorphism suggest that the hydrothermal influx occurred at shallow depths of burial, perhaps shortly following deposition of the peat.

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KW - Coal metamorphism

KW - Geochemistry

KW - Hydrothermal

KW - Marine margin

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JO - International Journal of Coal Geology

JF - International Journal of Coal Geology

ER -

Notes on the origin of altered macerals in the Ragged Edge of the Pennsylvanian (Asturian) Herrin coalbed, Western Kentucky

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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