Geochemical and petrographic alteration of rapidly heated coals from the Herrin (No. 6) Coal Seam, Illinois Basin
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文摘
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• Approaching the intrusion, Rr, C, and fixed carbon increase.

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• Approaching the intrusion, VM, H, O, and N decrease.

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• Micro-FTIR of vitrinite shows increased aromaticity (indicated by AR1 and AR2).

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• Micro-FTIR shows overall decrease in aliphatic chain length with increased Rr.

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• Different maturation pathway is seen for intruded coal.

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