black shale


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black shale

[¦blak ′shāl]
(petrology)
Very thinly bedded shale rich in sulfides such as pyrite and organic material deposited under barred basin conditions so that there was an anaerobic accumulation. Also known as biopelite.
References in periodicals archive ?
Ji, "Experimental investigation of mechanical properties of black shales after C[O.sub.2]-water-rock interaction," Materials, vol.
Black shale ore sample was taken from the Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan.
As a result, the Silurian black shale sequence of Western Ukraine can be regarded as a potential unconventional natural gas resource, and may therefore become an important supplement to the conventional energy sources in the future.
(2) Lockatong Formation (1000-2000 m)--mainly cyclic organic matter-rich black shale and grey to red mudstone, siltstone, and sandstone facies with intercalations of argillaceous carbonate (e.g., Van Houten 1964; Olsen 1986).
The presence of organic-rich and black shale facies in the Pliensbachian deposits of northern Spain and the Lusitanian Basin of Portugal, which are considered one of the main targets for oil and gas exploration in these areas (Suarez-Ruiz, 1987; Suarez-Ruiz and Prado, 1995; Duarte el al..
It consists of compacted black laminated calcareous mudstones and intercalated with dark packestones and phosphatic layers, the last of them with abundant rests of fish bones and teeth, and large calcareous cartwheel concretions of up to 8 m in diameter with ammonites in their centres (at the top), black shales with siliceous cherts, laminated claystones and abundant calcareous nodules (at the middle part), and intercalations of micritic limestones and dark cherts (at the bottom).
(9,16) Since the 1970s, the Deep Sea Drilling Project (DSDP) and the subsequent scientific ocean drilling programs (the Ocean Drilling Program, Integrated Ocean Drilling Program, and International Ocean Discovery Program) have played crucial roles in the study of Cretaceous OAEs by supplying relatively fresh samples of black shale from previously unsampled ocean basins.
The State Committee on Geology and Mineral Resources of Uzbekistan reports that explored and estimated uranium reserves make 185.8 thousand tons, 138.8 thousand tons of which sandstone-type uranium deposits, 47 thousand tons - black shale type.
Black shale is widely distributed in Southern China [12, 13], and its chemical weathering has been aggravated by the heavy rainfall and humid weather conditions along with element leaching [14].