Results 151 to 160 of about 1,928,014 (200)

Black Shale as a Sorbent for Trichloroethylene and CR(VI)

Environmental Technology, 2005
Black shale was examined as a natural sorbent for organic and inorganic contaminants. Trichloroethylene (TCE) could be removed well from the water by sorption onto the locally available black shale because of the high organic carbon content (5.2%) of the black shale in this study.
J E, Min, T, Lee, J, Choi, J W, Park
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Metals in Black Shales

1993
Shales that are rich in organic matter occur throughout the geologic record, but special conditions are responsible for their occurrence (Tourtelot, 1979). Before considering organic matter- and metal-rich shales, some background information is necessary.
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Metalliferous Black Shales

1991
Abstract Black shales are frequently repositories for valuable metal constituents and represent a record of past anoxic water conditions. These metalliferous, carbon-rich units also record geochemical interactions of carbon, iron, sulfur, oxygen, and often phosphorus.
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The Black Shale of Southwestern Virginia

The Journal of Geology, 1924
Conclusions as to the age and correlation of the black shale in several sections measured in southwestern Virginia are presented by the writer. There are recognized in this area the Genesee shale, Portage shale, and Chemung formation, of Devonian age, and a black shale correlated with the Chattanooga shale but here called the Big Stone Gap shale, of ...
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Bioflotation of a Black Shale Copper Ore

Advanced Materials Research, 2007
A sample of black shale fraction of copper ore from the Lubin deposit, Poland, was subjected to pretreatment by different microorganisms to improve the copper recovery during the subsequent flotation. Chemolithotrophic bacteria grown on So and S2O3 2- were used to depress pyrite before flotation by means of ethyl xantate as collector. Sulphate-reducing
Irena Spasova, Marina Nicolova, Stoyan Groudev   +2 more
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Model for transgressive black shales?

Geology, 1991
Many black shales in thick epicontinental basinal successions formed beneath an oxygen-restricted puddle of deep water. Other black shales formed during rapid transgression when basinal deposition expanded to cover basin-margin areas normally characterized by shallow-water deposition.
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Au-Cu Black Shale Formations

Earth Science Frontiers, 2007
Abstract The results of the generalization of lithologic-facial and paleogeographic reconstructions and genetic formational analysis of the various metalliferous high-carbonaceous Phanerozoic sedimentary complexes are presented and systematized. The factors predetermining the origin of ore concentrations of gold and copper are specified.
V.I. STAROSTIN, O.V. YAPASKURT
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Environments of Origin of Black Shales

AAPG Bulletin, 1939
ABSTRACT Explanations of origin are reviewed and environments in which black muds are in process of deposition are considered. The causes of blackness are examined and attention is given to diagenetic processes that take place in black muds.
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Black Shales

PALAIOS, 1995
Walter Etter, Paul B. Wignall
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Growth of sulphides in black shales.

1959
Sulphides can be divided into two major groups, those which are of hydrothermal origin and those which are of sedimentary origin. The sulphides of sedimentary origin are found in greatest abundance in bituminous rocks and it is these sulphides that have been investigated in the present work. A study of the sedimentary sulphides is of special importance
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