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- W109304813 abstract "Systematic study of elemental abundances in coal macerals and minerals is vital to understanding the genetic history and geological significance of particular coal beds in correlating coal beds for coal mine planning, in assessing the environmental impact of utilization of coal from a particular source, and in evaluating the potential for recovery of waste by-products and for catalytic action in coal conversion. In-situ determinationss of elemental concentrations in macerals and in clays, sulfides and other mineral constitutents may help to establish the primary vs. secondary emplacement of particular elements, i.e. elements which were fixed when the coal precursors were deposited vs. mobile elements which may have been introduced and/or redistributed by ground water circulation and other diagenetic processes. Furthermore, determinations of the distribution of elements between macerals and minerals is essential in evaluating the possibility of removal of contaminants by grinding and washing, because elements in macerals cannot be effectively removed by these procedures. Application of electron microprobe analysis to coal-related studies is still in the developmental stage. We report here preliminary results of intensive study of one columnar coal sample to indicate the nature of the data on elemental distribution that are readily obtainable through use of the electronmore » microprobe. In order to preserve the stratigraphic relationships of the different coal facies, polished blocks and polished thin sections were prepared to represent the total thickness of the coal bed. The electron microprobe has been used for in-situ determination of abundances of 23 elements in the macerals and for analyses of discrete mineral grains present at representative depths of the column.« less" @default.
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- W109304813 date "1979-01-01" @default.
- W109304813 modified "2023-09-24" @default.
- W109304813 title "Distribution of elements in coal macerals and minerals: determination by electron microprobe" @default.
- W109304813 hasPublicationYear "1979" @default.
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