Petrology and geochemistry of the Middle Pennsylvanian(Langsettian)Clintwood coalbed,Pike County,Kentucky
James C.Hower1
Cortland F.Eble2
Shelley D.Hopps3
Tonya D.Morgan3
Vivian A.Edwards3
1.Center for Applied Energy Research,University of Kentucky,2540 Research Park Drive,Lexington,KY 40511,USA;Department of Earth & Environmental Sciences,University of Kentucky,Lexington,KY 40506,USA2.University of Kentucky,Kentucky Geological Survey,Lexington,KY 40506,USA3.Center for Applied Energy Research,University of Kentucky,2540 Research Park Drive,Lexington,KY 40511,USA
摘要：The Middle Pennsylvanian,Langsettian sub-stage Clintwood coal,along with its correlatives,was one of the more important energy resources in eastern Kentucky.The coal thickens from the NE-SW-trending Belfry anticline in central Pike County to the southeast,towards the Virginia-Kentucky border.Much of the thickness increase is in the bright lithotypes below a dull lithology.The bright lithologies transition from a bright clarain+vitrain+fusain lithology to a clarain+fusain lithol-ogy to the southeast.Half of the lithotypes in the three analyzed sections exceed 1000-μg/g Rare earth elements+Y+Sc(REYSc)(ash basis).The LaN/SmN vs.GdN/YbN and LaN/SmN vs.CeN/CeN* plots suggest that the top lithotype may have had best indication of an oxidizing environment.Positive GdN/GdN* and EuN/EuN* in some of the lithologies suggests that there may have been a hydrothermal influence in the sediment sources and/or in the diagenesis of the coal.Consideration of LaN/SmN and Zr(μg/g;ash basis),Zr vs.Sr,and V/Cr vs.inertinite/(inertinite+vitrinite)indicates that the dull lithotypes existed in a distinct geochemical environment compared to the brighter lithotypes.The isolation of the dull lithotypes from the bright lithotypes is supported by principal components analysis on inertinite/(inertinite+vitrinite),LaN/SmN,V/Cr,Sr,and either Zr or Ln(100(TiO2)/Al2O3).
机标关键词：middlecountypikeclintwoodcoalbedgeochemistrykentuckylangsettian
论文发表日期：2025-04-30
在线出版日期：2025-10-15（本平台首次上网日期，不代表文献的发表时间）
页数：21( 87-107 )
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