English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This final report summarizes the chemical data for 17 cores from Kentucky X (1), West Virginia (1), Pennsylvania (4), Ohio (4), New York (3), Tennessee (3) and Illinois (2). Major elements, for example Si and Al, show changes related to stratigraphic boundaries when the effect of organic matter, sulfur^ and carbonate are removed. The geochemical associations of trace elements with organic carbon and sulfide sulfur are shown in down-hole plots, minor or trace element vs organic C or sulfide S plots, and by statistical correlation. The uranium and molybdenum are most strongly related to organic carbon. Based on down-hole plots and statistics, sulfur seems to control the abundance of Hg, As, Cu, and Pb in some cores, and organic matter shows some control over Cu and Ni. Vanadium and zinc are usually related to organic carbon or sulfur or both. Carbon and sulfur contents and their ratios can be used to infer an environment of deposition using C/S plots and to show trace element pathway during deposition and diagenesis. Introduction The U. S. Geological Survey in cooperation with Morgantown Energy Technology Center, U.S. Department of Energy, is characterizing Devonian black shales of the Appalachian basin as part of the Eastern Gas Shales program under interagency agreement EX-76-C-01-2278. The chemical data presented in this report can be used for resource assessment of such elements as U and V (which are presently sub economic) and can be used to recognize possible environmental problems caused by such elements as As and Hg. These chemical data are useful in stratigraphic correlations; and particularly for geochemical assessment of source rocks, and characterization of depositional environment for oil and gas potential or resources. Chemical data and geochemical controls and affinities of Co, Hg, Mo, Ni, V, Zn, Mn, Cu, Th, U, and As in black shales are presented in this report. Earlier reports dealt with U, Th, C, and S (Leventhal and Goldhaber, 1978) and major, minor, and trace elements in other Devonian samples (Leventhal, 1978, 1979, 1980). This report includes chemical data from 17 cores (fig. 1) which completes the analytical work that was initiated as part of Eastern Gas Shales Program. Previous reports (see References) presented data and interpretation of some aspects of the work.

Geochemistry of trace elements and uranium in Devonian shales of the Appalachian Basin