Journal
EARTH AND PLANETARY SCIENCE LETTERS
Volume 432, Issue -, Pages 13-23Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.epsl.2015.09.030
Keywords
Re-Os geochronology; marine-influenced coal; hydrogen index (HI); Matewan coal, Betsie Shale Member
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Funding
- University of Oslo [2012/7006]
- U.S. Geological Survey (USGS) [G12PX01985]
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Coal deposits are integral to understanding the structural evolution and thermal history of sedimentary basins and correlating contemporeous estuarine and fluvial delatic strata with marine sections. While marine shales may readily lend themselves to Re-Os dating due to the dominance of hydrogenous Re and Os, the lack of a chronometer for near-shore sedimentary environments hampers basinwide correlations in absolute time. Here, we employ the Re-Os geochronometer, along with total organic carbon (TOC) and Rock-Eval data, to determine the timing and conditions of a marine incursion at the top of the Matewan coal bed, Kanawha Formation, Pottsville Group, West Virginia, USA. The observed range for hydrogen index (HI: 267-290 mg hydrocarbon/gram total organic carbon) for these coal samples suggests dominance of aliphatic hydrocarbons with low carbon (
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