Inorganic geochemistry of Devonian shales in southern West Virginia: geographic and stratigraphic trends

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Samples of cuttings from twenty-one wells and a core from a single well in southern West Virginia were analyzed for major and minor elements: silicon, aluminum, iron, magnesium, calcium, sodium, titanium, phosphorus, manganese, sulfur, zinc, and strontium. Stratigraphic and geographic controls on elemental abundances were studied through canonical correlations, factor analyses, and trend surface analyses. The most abundant elements, silicon and aluminum, show gradual trends through the stratigraphic column of most wells, with silicon increasing and aluminum decreasing up-section. Other elements such as calcium, sulfur, and titanium change abruptly in abundance at certain stratigraphic boundaries. Important geographic trends run east-west: ... continued below

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Pages: 41

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Hohn, M.E.; Neal, D.W. & Renton, J.J. April 1, 1980.

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Description

Samples of cuttings from twenty-one wells and a core from a single well in southern West Virginia were analyzed for major and minor elements: silicon, aluminum, iron, magnesium, calcium, sodium, titanium, phosphorus, manganese, sulfur, zinc, and strontium. Stratigraphic and geographic controls on elemental abundances were studied through canonical correlations, factor analyses, and trend surface analyses. The most abundant elements, silicon and aluminum, show gradual trends through the stratigraphic column of most wells, with silicon increasing and aluminum decreasing up-section. Other elements such as calcium, sulfur, and titanium change abruptly in abundance at certain stratigraphic boundaries. Important geographic trends run east-west: for instance, one can see an increase in sulfur and a decrease in titanium to the west; and a decrease in silicon from the east to the central part of the study area, then an increase further west. Although observed vertical trends in detrital minerals and geographic patterns in elemental abundances agree with the accepted view of a prograding delta complex during Late Devonian time, geographically-local, time restricted depositional processes influenced elemental percentages in subsets of the wells and the stratigraphic intervals studied. The black shales of lower Huron age do not represent simply a return of depositional conditions present in the earlier Rhinestreet time; nor do the gray shales of the Ohio Shale represent the same environmental conditions as the Big White Slate.

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Pages: 41

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NTIS, PC A03/MF A01.

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  • Report No.: DOE/METC/5199-7
  • Grant Number: EY-76-C-05-5199
  • DOI: 10.2172/5365399 | External Link
  • Office of Scientific & Technical Information Report Number: 5365399
  • Archival Resource Key: ark:/67531/metadc1071628

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  • April 1, 1980

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  • Feb. 4, 2018, 10:51 a.m.

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  • March 29, 2018, 1:13 p.m.

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Hohn, M.E.; Neal, D.W. & Renton, J.J. Inorganic geochemistry of Devonian shales in southern West Virginia: geographic and stratigraphic trends, report, April 1, 1980; United States. (digital.library.unt.edu/ark:/67531/metadc1071628/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.