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Block coals from Indiana: inferences on changing depositional environment by Maria Mastalerz; Penny L Padgett; Cortland F Eble is a Engineering article available to read on EtoBox.

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Significant differences in coal petrography, palynology and coal quality were found between Ž . the Lower Block and Upper Block Coal Members Brazil Formation, Pennsylvanian in Daviess County, Indiana. The Lower Block Coal Member ranges in thickness from 51 to 74 cm and the Upper Block Coal Member ranges from 20 to 65 cm. Average sulfur content and ash yield of the Ž . Lower Block coal 0.98%, 7.65% are lower than in the Upper Block coal. Megascopically, the coals show distinct differences. The Lower Block is a banded coal with numerous thin fusain horizons and a thin clay parting in the lower third of the seam. The Upper Block coal has a dulling-upward trend, with a bright clarain found at the base that grades into a clarain and then into a durain in the upper portion of the seam. Vitrinite content of the Lower Block coal ranges from 63% to 78%, with the highest vitrinite content found in the middle portion of the seam. In the Upper Block coal, vitrinite content ranges from 40% to 83%, with the highest values found in the lower part of the seam. Ash yield is higher in the upper part of the Upper Block coal, reaching up to 40%. The Lower Block coal is dominated by lycopod trees and t

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Author

Maria Mastalerz; Penny L Padgett; Cortland F Eble

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0166-5162)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)