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- W42987159 abstract "In-seam pyrite distributions, inorganic and organic associations, and effects of seam floor paleotopography on these distributions were examined in the Springfield Coal, Indiana. Macroscopic and microscopic pyrite types were oxidized in an electrograph, and pyrites with differing oxidation rates were subjected to x-ray diffraction analysis to measure relative crystallinity. Paleotopographically high portions of the seam tended to be thinner and contain more macroscopic lenticular and cleat filling pyrite than lower portions. Microscopic pyrite was concentrated in the inorganic (mainly clay) layers in the seam. Other pyrite-associated minerals were calcite and siderite. Highly oxidizing pyrite exhibited small crystal size (less than 10 microns) and low crystallinity. Moderately oxidizing pyrite occurred as 15 to 25 micron crystals with higher crystallinity than the higher oxidizing type, and weakly oxidizing pyrite had the largest crystal size (greater than 25 microns), and the highest degree of crystallinity." @default.
- W42987159 created "2016-06-24" @default.
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- W42987159 date "1975-01-01" @default.
- W42987159 modified "2023-09-27" @default.
- W42987159 title "Pyrite in the Springfield Coal member (V), Petersburg Formation, Sullivan County, Indiana" @default.
- W42987159 hasPublicationYear "1975" @default.
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