Results 191 to 200 of about 1,305,689 (236)

A Marine Biogeochemical Perspective on Black Shale Deposition

Earth-Science Reviews, 2009
Abstract Deposition of marine black shales has commonly been interpreted as having involved a high level of marine phytoplankton production that promoted high settling rates of organic matter through the water column and high burial fluxes on the seafloor or anoxic (sulfidic) water-column conditions that led to high levels of preservation of ...
D Z Piper
exaly   +2 more sources

The methane adsorption characteristics of marine shale

Petroleum Science and Technology, 2017
The marine shale gas in South China has great exploration potential, and exploration in the Sichuan Basin has been successful, but the degree of exploration is low in Guizhou Province.
Yang Gu, Wenlong Ding, Jingshou Liu, Zikang Xiao, Changcheng Lin   +4 more
openaire   +1 more source

De-A-steroids in immature marine shales

Organic Geochemistry, 1986
Abstract Three series of de-A-diasterenes have been observed in a variety of immature marine shales. Two of them have been identified by comparison with authentic standards and the structures of the third assigned by extrapolation. The greater complexity in the number of series compared with diasterenes indicates that the ring A degradation occurred ...
T.M. Peakman, P. Farrimond, S.C. Brassell, J.R. Maxwell   +3 more
openaire   +1 more source

Natural Fractures of the Tuscaloosa Marine Shale

AAPG Bulletin
The Tuscaloosa Marine Shale (TMS) is an unconventional play in southwestern Mississippi and southeastern Louisiana characterized by a well-developed network of natural fractures that strongly influences reservoir behavior and hydraulic fracturing performance.
Cristina Mariana Ruse, Mehdi Mokhtari
openaire   +1 more source

Surface Properties of Organic Kerogen in Continental and Marine Shale

Langmuir, 2018
The adhesion energy of kerogen in continental and marine shale was innovatively discovered using the colloid probe technique with atomic-force microscopy (AFM). AFM results indicated that the adhesion force of kerogen was higher than the inorganic material in both the continental and marine shale samples.
Shouceng Tian, Xiaoxiao Dong, Tianyu Wang, Rui Zhang, Panpan Zhang, Mao Sheng, Shizhong Cheng, Hong Zhao, Ling Fei, Jason Street, Yusheng Chen, Quan Xu   +11 more
openaire   +2 more sources

Autoradiographic study of marine shales

Economic Geology, 1952
The autoradiographic study of several marine shales was undertaken in support of previous research, that was concerned with the influence of radioactivity on the transformation of certain organic constituents of marine shales into petroleum hydrocarbons.
openaire   +1 more source

Geochemical Characteristics of Marine and Terrestrial Shale Gas in China

Marine and Petroleum Geology, 2016
Abstract Although the annual production of shale gas in China was 13 × 10 8  m 3 in 2014, a systematic study on geochemical and isotopic characteristics of these unconventional gases has not been well addressed. In the present study, almost all shale gas samples available in China, including marine shale gas from the Wufeng-Longmaxi Formation in the
Caineng Zou, Yunyan Ni, Chenchen Fang
exaly   +2 more sources

Iron isotope biogeochemistry of Neoproterozoic marine shales

Geochimica et Cosmochimica Acta, 2017
Abstract Iron isotopes have been widely applied to investigate the redox evolution of Earth’s surface environments. However, it is still unclear whether iron cycling in the water column or during diagenesis represents the major control on the iron isotope composition of sediments and sedimentary rocks.
Kunzmann, M., Gibson, T., Halverson, G., Hodgskiss, M., Bui, T., Carozza, D., Sperling, E., Poirier, A., Cox, G., Wing, B.   +9 more
openaire   +2 more sources

Mesozoic marine organic-rich shales

Geological Society, London, Special Publications, 1987
Summary A survey of Mesozoic organic-rich shales in space and time indicates that they are widely distributed through much of the era but are concentrated especially at two levels: Upper Jurassic (Kimmeridgian-Volgian/Tithonian) and Middle Cretaceous (Aptian-Turonian).
openaire   +1 more source

Microfossils as environment indicators in marine shales

Journal of Sedimentary Research, 1951
Abstract Interpretations of depositional environments from microfossils are based mainly on comparisons of fossil assemblages with the micro-organic remains in present day sea muds. Qualitative comparisons of species, genera, and families common to both shales and sea muds have provided two broad generalizations.
openaire   +1 more source