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Showing 1 to 20 of 21 for “"Black shale."”.
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Petrology, geochemistry, diagenesis and depositional environment of the Upper Devonian - Lower Carboniferous Exshaw Formation, northwestern Alberta.
… of an upper siltstone member and a lower black shale member. For the purpose of this investigation only the lower black shale in the Tangent Field of the Peace River embayment (T80-R23W5) was studied. The lower black shale member of the Exshaw Formation can be divided into two informal …
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Combining body wave tomography, surface wave inversion, seismic interferometry and laboratory measurements to characterize the black shales on Bornholm at different scales
Black shales are sedimentary rocks with a high content of organic carbon, which leads to a dark grayish to black color. Due to their potential to contain oil or gas, black shales are of great interest for the support of the worldwide energy supply. An integrated seismic investigation of the Lower …
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Stratigraphic partitioning and reservoir distribution of the Late Devonian to Early Mississippian Exshaw Formation, Western Canada Sedimentary Basin.
… to Early Mississippian Exshaw Formation is a black shale reservoir within the Western Canada Sedimentary Basin (WCSB) that accumulated as an organic-rich basinal mudrock within a tectonically extensional region prone to horst and graben structures. This study characterizes sedimentologic and …
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Metals hosts in the Pennsylvanian Hushpuckney and Stark Black Shales from Selected Areas in Kansas City
The Hushpuckney Shale of the Swope Formation and the Stark Shale of the Dennis Formation, two black shales in the Pennsylvanian Kansas City group, contain elevated concentrations of transition and based metal elements, notably zinc, lead, vanadium, and others. Both shales consist of an organic-rich …
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Sedimentology, ichnology, and stratigraphic architecture of the upper Devonian-lower Mississippian Bakken Formation, west-central Saskatchewan
… Middle Member deposited between Lower and Upper Black Shale Members. Based on detailed core description, eight facies have been defined for the Bakken Formation of west-central Saskatchewan: Facies 1 (Lower and Upper Black Shale members), Facies 2 (bioturbated siltstone/sandstone), Facies 3 …
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Characterizing ancient chemoclines through the use of pigment biomarkers and sedimentary stable isotope signatures
… to the strongly depleted δ15Nbulk values in the black shales of Mesozoic OAEs, and other anoxic basins of the past and can bolster predictions on the effects of future warming and deoxygenation on nutrient cycling in the modern ocean. Additionally, it provides a set of stable isotope and pigment …
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Palynofacies and sedimentology of some Late Jurassic sediments from the British Isles and northern North Sea
… meromictic water bodies for the deposition of 'black shales'. In epeiric settings preservation is probably a more important determinant of black shale deposition than primary productivity. Optimal preservation of marine carbon occurs in dysaerobic to anoxic bottom waters. Such facies can be …
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Structure Segmentation and Transfer Faults in the Marcellus Shale, Clearfield County, Pennsylvania: Implications for Gas Recovery Efficiency and Risk Assessment Using 3D Seismic Attribute Analysis
The Marcellus Shale has become an important unconventional gas reservoir in the oil and gas industry. Fractures within this organic-rich black shale serve as an important component of porosity and permeability useful in enhancing production. Horizontal drilling is the primary approach for …
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Faunal, sedimentological and geochemical indicators of dysoxia in Cretaceous marine sediments
… organic matter was extensively deposited in 'black shale' facies. Although diverse criteria for the recognition of low oxygen levels have been described previously they have not been fully calibrated. This project compares palaeooxygenation related features of lower Cretaceous rocks from the …
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Surface-cycling of rhenium and its isotopes
… available Re products, and 0.5h across a black shale weathering profile. δ187Re variability across the weathering profile was systematic with the most weathered samples showing the most significant 187Re depletions. The Re isotopic weathering profile is well described by both two-component …
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Experimental analysis of the post-failure behavior of coal and rock under laboratory compression tests
… massive sandstone with coal streaks, grey shale and black shale) were tested in the rock mechanics laboratory. Two feedback-control modes: axial strain control and lateral strain control modes was adopted to study the post-failure behaviors of those samples. Load control was used for …
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Isotopic constraints on sources and cycling of riverine dissolved inorganic carbon in the Amazon Basin
… influence by marginal processes such as black shale oxidation and lithospheric CO2 degassing.
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Natural Gas Generation Potential of the Wufeng-Longmaxi and Niutitang Shale Formations, Sichuan Basin, China: Insight from Hydrous and Anhydrous Pyrolysis
A comparative study was conducted on the residual shale gas generation potential of the Silurian Wufeng-Longmaxi and Cambrian Niutitang formations of the Sichuan Basin, China. Previous studies focused on geological variables affecting gas adsorption and retention in the Silurian and Cambrian shale …
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Chemostratigraphy of the Uppermost Cambrian Below the Ordovician GSSP
… GSSP consists of alternating dark gray to black shale and thin ribbon limestone rhythmites, with few fossils. The samples are micritic limestone, dolomitic limestone, and dolostone. They were determined to be in primary to near-primary condition based on multiple screening tests. …
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Maceral Variations and Maceral Assemblages within the Upper and Lower Members of the Bakken Formation, Williston Basin, Saskatchewan, Canada.
… within southern Saskatchewan contains two black shale members, the Upper and Lower Bakken Formation. This study has examined the organic matter within the Upper and Lower members of the Bakken Formation using fluorescence light microscopy on samples taken from core, at closely-spaced …
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The gold absorption properties of shaly material from Beatrix Gold Mine
… of adsorbing gold from cyanide solutions. Black shale bands occur in the reef zone at Beatrix Mine, but because of the mode of occurrence of the shale bands selective mining cannot be practised and ore delivered to the plant is contaminated by shale. Petrographical investigations and gold …
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Macrofossils and biostratigraphy of the Bakken Formation (Devonian and Mississippian) in western North Dakota
… Williston Basin that typically consists of two black shale members separated by a middle member of predominantly gray siltstone or silty limestone up to 85 feet thick.</p> <p>Well over 500 macrofossils representing more than 50 taxa were collected from cores of 40 wells. Brachiopods, the most …
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Developing iodine proxies for oceanic oxygenation conditions during greenhouse episodes
… I use I/Ca in bulk carbonate and I/TOC in black shale to reconstruct redox changes in the upper and deep waters in multiple ocean basins through the Cretaceous OAE 2 at the Cenomanian-Turonian boundary (94 Ma). The iodine proxy records are interpreted in the context of a wide range of other …
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An integrated approach of determining shale gas potentiality of carbonaceous shale of the Permian Tuli Basin, Limpopo Province of South Africa
Shale gas displays signs of future potential for energy generation. Apart from the fluctuating prices of liquid fuel and energy resources, the recent national load shedding of electricity supply is probably the most obvious sign of the energy security crisis in South Africa. To expand energy …
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