Assessing Organic Matter Type in Upper Devonian-Lower Mississippian Black Shales
Title | Assessing Organic Matter Type in Upper Devonian-Lower Mississippian Black Shales PDF eBook |
Author | Jennifer A. Thompson |
Publisher | |
Pages | 226 |
Release | 2004 |
Genre | |
ISBN |
Molecular and Stable Isotopic Study of Organic Matter in the Upper Devonian-Lower Mississippi Black Shales of the Appalachian Basin
Title | Molecular and Stable Isotopic Study of Organic Matter in the Upper Devonian-Lower Mississippi Black Shales of the Appalachian Basin PDF eBook |
Author | Tao Sun |
Publisher | |
Pages | 296 |
Release | 2006 |
Genre | |
ISBN |
Controls on Organic Carbon Accumulation in the Devonian-Mississippian Black Shales of Central Kentucky, Appalachian Basin
Title | Controls on Organic Carbon Accumulation in the Devonian-Mississippian Black Shales of Central Kentucky, Appalachian Basin PDF eBook |
Author | Jack Edward Sanders (Jr) |
Publisher | |
Pages | 118 |
Release | 2015 |
Genre | Appalachian Basin |
ISBN |
The environment of deposition of the Ohio Shale of the Appalachian Basin has been studied extensively using various geochemical proxies for each of its members. The accumulation of organic matter (OM) and its preservation in the Late Devonian-Early Mississippian black shales of central Kentucky have been studied extensively, especially the possible correlations between trace metal contents and water-column oxygenation. Previous work has centered on geochemical, petrographic, and isotopic analysis of samples collected throughout the central Appalachian Basin. Mechanisms for OM preservation include high productivity, enhanced preservation due to dysoxic or anoxic bottom waters, and a feedback loop due to high productivity that creates enhanced preservation through the periodic cycling and scavenging of essential nutrients. Usually, a combination of these factors results in the accumulation of enough OM to produce these black shales. This research shows the relationships between trace metal data and the environment of deposition of several cores taken along the eastern side of the Cincinnati Arch in the central Appalachian Basin. Whereas the indices do not all agree in every instance across the breadth of the study area, analyzed together a predominant environment of deposition has been inferred for the shales. The Sunbury Shale and upper part of the Cleveland Member of the Ohio Shale were deposited under euxinic conditions, the lower part of the Cleveland Member was likely euxinic in the northern study region and anoxic throughout the central and southern study areas, whereas the Huron Member of the Ohio Shale was deposited under a range of conditions, from oxic, to dysoxic, to anoxic.
Geochemical and Petrographic Analysis of the Upper Devonian-Lower Mississippian Bakken Black Shales from the Williston Basin, North Dakota
Title | Geochemical and Petrographic Analysis of the Upper Devonian-Lower Mississippian Bakken Black Shales from the Williston Basin, North Dakota PDF eBook |
Author | William J. Hartwell |
Publisher | |
Pages | 512 |
Release | 1998 |
Genre | |
ISBN |
Geochemical Investigations of Some Black Shales and Associated Rocks
Title | Geochemical Investigations of Some Black Shales and Associated Rocks PDF eBook |
Author | James David Vine |
Publisher | |
Pages | 52 |
Release | 1969 |
Genre | Geochemistry |
ISBN |
The content and association of minor elements in some black shales deposited in various types of geologic environments.
Geochemistry of Black Shales of the New Albany Group (Devonian-Mississippian) in the Illinois Basin
Title | Geochemistry of Black Shales of the New Albany Group (Devonian-Mississippian) in the Illinois Basin PDF eBook |
Author | Joyce K. Frost |
Publisher | |
Pages | 32 |
Release | 1996 |
Genre | Black shales |
ISBN |
Black Shales
Title | Black Shales PDF eBook |
Author | P. B. Wignall |
Publisher | |
Pages | 152 |
Release | 1994 |
Genre | Nature |
ISBN |
Black shales provides the first comprehensive synthesis of the diverse research regarding the origin of petroleum source rocks. The book offers in-depth reviews from the fields sedimentology, palaeoecology, and geochemistry, and particularly focuses on the influence of palaeo-oxygen levels. Current debates--including the one over the influence of sedimentation rate, productivity, and enhanced preservation on the burial efficiency of organic carbon--receive a lively discussion. In addition, the importance of newly defined concepts of sequence stratigraphy to models of the formation of black shales receives an in-depth treatment for the first time. The book will be of interest to all geologists investigating palaeoenvironments, particularly those engaged in the search for hydrocarbons.