Black shales

Dec 1, 2021 · An indicative classification of black shales can be c

Black shale outcrops of the Belata Formation in Peninsular Malaysia were evaluated for their unconventional resource potential. The study revealed the presence of a high and good source of the organic carbon content in the Belata black shales, which ranges between 1.90 wt % to 4.05 wt% and averages 2.92 wt%. However, from the pyrolysis and ...Black shale is a kind of special sedimentary rock with enriched organic matter, which may contain shale oil and gas. With the outbreak of shale oil and gas revolution in …

Did you know?

The Carboniferous (Namurian) Clare Shale Formation (Shannon Group) consists of finely laminated, pyritic, deep marine black shales, deposited 326.5-318.5 Ma (Menning et al., 2006; Wignall and Best, 2000).The black shale sequence is up to 180 m thick at surface, (Tanner et al., 2011), with a maximum observed thickness of 280 m in the 'Doonbeg No 1' drill hole, Co Clare (Goodhue and ...For the present study, black shale samples of the Doushantuo Formation at Jiulongwan and Baiguoyuan sections were collected (Fig. 1, Fig. 2).The stratigraphy and sedimentary structures of the two sections have been discussed in detail elsewhere (McFadden et al., 2008, Mi et al., 2010).Black shale samples were collected from the ∼12 m thick Member 4 at the Jiulongwan section, including 7 ...Black shales intercalated with phosphorites of the Duwi Formation outcrop in the Qusseir-Safaga area, Red Sea coast (Fig. 1). Based on its lithology, Baioumy and Tada (2005) subdivided the Duwi Formation in the studied area into four members (Fig. 2). The lower member that ranges in thickness from 35 to 50 m is composed by yellowish-grey ...Definition Most modern and ancient aquatic (marine, brackish, and lacustrine) environments were sufficiently oxygenated to permit colonization by numerous benthic, planktic, and …Duwi black shales contain considerable concentrations of redox sensitive metals (e.g. V, U, Mo, Ni) and other economic elements (Cu, Pb, Zn). The enrichment of black shale with Zn, V, Cu and Cr ...The ∼1.40 Ga Xiamaling Formation (XML) in the North China Craton (NCC) developed exceptionally well-preserved organic-rich shales with low maturity (Wang et al., 2018), which is unique superiority in the study of biomarker compositions in early Earth. Here we reported the distinctive hydrocarbon biomarkers of the XML black shales in the NCC.Formation of organic-rich shales (black shales) containing several to tens of weight percent total organic carbon (TOC) requires an increased supply of organic matter (OM) and/or enhanced preservation of the OM in low-oxygen waters (e.g. Meyers, 2006). These low-oxygen environments favor chemical precipitation and/or adsorption of redox ...Black shales are sedimentary rocks containing > 0.5% of organic carbon. They host polymetallic deposits which have been mined for Cu, Ni, Zn, Mn, P, Mo, V, U, Au and PGE (platinum group elements).Organic matter pores are considered to be the most important type of pore for preserving hydrocarbon gases in shale gas reservoirs. The organic matter in each over-mature marine shale sample was separated into two organic fractions with densities of greater than and less than 1.25 g/cm3, and then their molecular compositions and pore characteristics were quantitatively evaluated using solid ...Lacustrine black shales are widely developed within the Late Cretaceous Nenjiang Formation (k 2 n) of the Songliao Basin. These black shales provide an ideal natural laboratory for reconstructing the paleoclimate and paleoenvironment during the Late Cretaceous in Northeast China and have great significance in the exploration for …In this study, uniaxial compressive strength (UCS) tests together with an acoustic emission (AE) system and SEM and EDS analysis were performed to investigate the mechanical properties and microstructural changes of black shales with different saturation times (10 days, 20 days and 30 days) in water dissoluted with gaseous/super-critical CO₂.In this study, uniaxial compressive strength (UCS) tests together with an acoustic emission (AE) system and SEM and EDS analysis were performed to investigate the mechanical properties and microstructural changes of black shales with different saturation times (10 days, 20 days and 30 days) in water dissoluted with gaseous/super-critical CO₂.The basal unit of the Early Cambrian black shale sequence of South China hosts sulfide-rich polymetallic units, non-sulfidic vanadium-rich black shales, sapropelic alginite (combustible shale), barite, and phosphorite. This rock spectrum occurs in a paleoceanographic similar, and stratigraphically correlated, transgressive upwelling setting on the passive continental margin of the ...First, black shale formations Second, rocks containing organic carbon are host ore deposits containing base and precious encountered near many types of ore ...China's most successful horizon for shale-gas exploration and development is the Upper Ordovician Wufeng Formation through the Lower Silurian Longmaxi Formation in its Upper Yangtze Region. In this study, the Wufeng-Longmaxi Formation black shales in the Upper Yangtze Region are analysed to determine their microstructural characteristics, total organic carbon (TOC) content, and well log ...Black shales of the ca. 1.73 Ga Wollogorang Formation previously yielded an erroneously young Re-Os date of 1359 ± 150 Ma, likely due to post-depositional hydrothermal alteration at ca. 1640 Ma. Higher δ 238 U is observed in samples closer to the base of the black shale unit where the greatest extent of open-system Re-Os behavior was observed.The Global Geochemical Database for Critical Metals in Black Shales (CMIBS) contains new geochemical data compilations for fine-grained sedimentary rocks in which each geologic material sample has one 'best value' determination for each analyzed species, greatly improving speed and efficiency of use (Granitto and others, 2013). The CMIBS was created and designed to compile and integrate geochemicaThe concentrations of U, V, and Mo in Lantian blaBlack shale source rocks can also host oil and gas The black shales were mainly developed in the transgressive systems tracts in sequences 3, 4 and 6, and only small amount of black shales deposited in the regressive systems tract in sequence 2 which was related to the Cretaceous Oceanic Anoxic event (Hu et al., 2014). Gray-black shale associations in Sh2c. Gray shales are d The Datangpo Formation can be sub-divided into four lithostratigraphic members from bottom to top (Fig. 2): (1) Member I is a succession of black manganiferous shale and Mn carbonates (Mn contents distinguish manganiferous shales with Mn < 10 % from Mn carbonates with Mn > 10 %); (2) Member II is composed mainly of black carbonaceous shale; (3 ... The Lower Silurian black shale in the Southeast of Chongqing is of

The black shale of the Wufeng-Longmaxi Formation in Qianjiang has the characteristics of high organic matter content and high maturity, and the thickness of the high-quality shale section is relatively large, which is comparable with Pengshui. The minimum TOC value of the high-quality shale section of sublayers 1-5 ranges from 0.92 …The importance of black shales for scientists and the society are twofold. Black shales serve as source rocks for fossil fuels (oil and gas), which cover most of the energy needs of modern societies, and due to excellent preservation they provide particular sites for palaeontological studies.The calibration of the Tl isotope redox tracer in modern euxinic (anoxic and containing dissolved sulfide in the water column, such as the Black Sea and Cariaco Basin) and anoxic but non-euxinic (sulfidic conditions limited to sediment pore fluids, such as the Santa Barbara Basin) environments suggests that black shales deposited under these conditions have the potential to faithfully record ...The black shale sequence of the Niutitang Formation is enriched in a broad spectrum of redox-sensitive trace elements, i.e., Mo, Ni, Zn, Cr, V, PGE, Au, and U, typical of black shales in general (Holland, 1979, Ketris and Yudovich, 2009, Vine and Tourtelot, 1970).Significantly, an unusual polymetallic Ni-Mo-PGE-Au sulfide ore layer enriched in organic and phosphatic materials occurs ...

Dec 24, 2002 ... ... Shale, New Albany Shale and Green River Shale. At all sites, organic P ... black shales. Our results indicate that certain P esters withstand ...The Ordovician-Silurian (O S) transition witnessed dramatic tectonic, climatic, marine, and biological coevolution, during which organic-rich black shale was widely deposited and is considered an important source rock. However, the potential links between the differential enrichment pattern of organic matter and climate fluctuations and paleoenvironmental evolution during this period are still ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The Bodaibo District (the Irkutsk Region of Russi. Possible cause: Black shale is a dark-colored mudrock containing organic matter that may have genera.

selected black shales from the Netherlands that are being consid ered as targets for . shale gas exploration. Excess sorption isotherms at 65°C and up to 25 MPa were .Among these are black shales: fine-grained laminated sedimentary rocks rich in organic carbon (∼3% by weight or more) that also usually contain chemically distinct distributions of redox sensitive metals and sulfide minerals. When ancient sedimentary rocks rich in organic carbon are exposed on Earth's continents through uplift and erosion ...some of which are black shales, such as the Marcellus and Genesee. The stippled areas adjacent to the black shale outcrop in the east-central interior represent Lower Mis-sissippian strata. The positions of the Nashville and Lexington domes, portions of the Cincinnati arch, are clearly outlined by the black shale outcrops. The black shale

The Ohio Shale is subdivided into seven recognizable units: Cleveland Shale, Three Lick Bed, Upper, Middle, and Lower Huron, Olentangy, and Rhinestreet. The Olentangy and Rhinestreet black shales correspond to the Java Formation of West Virginia, and thin and pinch out westward. A summary of reservoir data for the Big Sandy GasApr 13, 2016 ... Roveacrinida (Crinoidea) from Late Triassic (early Carnian) black shales of Southwest China · Abstract · Introduction · Osteocrinus in the Late ...

A possible, but untested, sequestration strategy is to inject CO{sub Highly metalliferous black shales (HMBS) or hyper-enriched black shales (HEBS) contain >1500 ppm of combined Mo+Ni+Zn+Se+V (Johnson et al. 2017; Gadd et al. 2022). In addition to the metals ...Microbial communities in black shales: diversity of metabolic roles. In addition to a rich source of organic matter, black shales often containing significant concentrations of sulfide minerals, notably pyrite (FeS 2). Oxidation of pyrite in black shale weathering profiles generates a source of sulfate, ferric iron, and acidity. Black shale. This page is currently not sponsThe black shale mineral composition is mainly composed of c Permian black shales from the lower Ecca Group of the southern main Karoo Basin (MKB) have a total organic carbon (TOC) of up to ~5 wt% and have been considered primary targets for a potential ... The Barnett Shale, Marcellus Shale, Haynesville S Black shale tends to suffer from chemical weathering in nature due to its high content of organic matter (OM) and unstable minerals (e.g. feldspar and pyrite). The weathering of black shale has drawn attention over the past decade for its unique environmental and petrophysical impact (Jaffe et al., 2002, Jin et al., 2013, Petsch et al., 1999 ... The black shale of the Niutitang Formation is characterized by elevaA shale is a sedimentary rock that is compBlack shales of the ca. 1.73 Ga Wollogor greater for the black shales (38.1) than for the green claystones (5.7} and is typical of C/N ratios of cellulosic land-plant organic matter 8• The 13 C content of organic matter in black shales ... Shales that are rich in organic matter (>5%) are For the present study, black shale samples of the Doushantuo Formation at Jiulongwan and Baiguoyuan sections were collected (Fig. 1, Fig. 2).The stratigraphy and sedimentary structures of the two sections have been discussed in detail elsewhere (McFadden et al., 2008, Mi et al., 2010).Black shale samples were collected from the ∼12 m thick Member 4 at the Jiulongwan section, including 7 ...Here we investigated the redox-sensitive elements and Fe speciation of the black shales that were deposited in basin facies from Doushantuo Formation in South China, which proxy the redox condition of deep water in Nanhua basin during most of the Ediacaran period. In addition, the enrichment mechanism of trace elements also provided new ... Black shales are known to contain high concentrations of [Sequence stratigraphy reveals that widespread black shBlack shale is widely distributed on the norther Two immature black shales from the Mesoproterozoic Xiamaling Formation, Xiajiagou outcrop, Zhangjiakou, Hebei Province, China, two immature black shales from the Cambrian Alum Shale Formation, Degerhamn, Öland island, Sweden, and a carboniferous low rank coal with VR o of 0.56% (sample ID ZJJ-C4) were collected for this study (Table 1).Black shale. A dark, thinly laminated carbonaceous shale, exceptionally rich in organic matter (5% or more carbon content) and sulfide (esp. iron sulfide, usually pyrite), and often containing unusual concentrations of certain trace elements (U, V, Cu, Ni). Alabama - Arizona - Illinois - Indiana - Kentucky - Massachusetts - Maryland - Maine ...