Results 31 to 40 of about 1,392,562 (335)

Methane seepage in a Cretaceous greenhouse world recorded by an unusual carbonate deposit from the Tarfaya Basin, Morocco [PDF]

, 2017
During the Cretaceous major episodes of oceanic anoxic conditions triggered large scale deposition of marine black shales rich in organic carbon. Several oceanic anoxic events (OAEs) have been documented including the Cenomanian to Turonian OAE 2, which ...
Agirrezabala, Algeo, Algeo, Amblés, Anderson, Anderson, Arthur, Arthur, Astin, Ayoub-Hannaa, Barron, Baudin, Beauchamp, Birgel, Birgel, Birgel, Bohrmann, Bonarelli, Bramlette, Bromley, Brumsack, Brumsack, Busson, Calvert, Campbell, Campbell, Campbell, Carson, Coleman, Coleman, Collignon, Conti, Crusius, Dando, De Boever, DeMaster, Dickson, El Albani, El Albani, El Albani, El Albani, El Qot, Erba, Eshet, Feng, Formolo, Forster, Forster, Gale, Gebhardt, Gertsch, Goedert, Greinert, Guido, Haas, Hagemann, Hallam, Handoh, Haq, Hardenbol, Hattner, Hay, Hay, Heany, Heinrichs, Helz, Herbin, Herrle, Hetzel, Himmler, Holbourn, Hudson, Hudson, Ingall, Jenkyns, Jenkyns, Jenkyns, Jones, Judd, Kaiho, Kasten, Kauffman, Keene, Kerr, Kiel, Kiel, Kiel, Kiel, Kiel, Knauth, Kolonic, Kolonic, Kuechler, Kuhnt, Kuhnt, Kuhnt, Kuhnt, Kuhnt, Kuypers, Könneke, Lancelot, Larson, Larson, Layeb, Layeb, Leine, Liang, Little, Liu, Lüning, Lüning, Marshall, Marzouk, Mascle, Mattioli, McAnena, Metz, Meyer, Morford, Morford, Mort, Mozley, Naehr, Natalicchio, Nederbragt, Nöthen, Owens, Pearson, Peckmann, Peckmann, Peckmann, Peckmann, Peckmann, Peckmann, Peckmann, Peckmann, Poulton, Raiswell, Raiswell, Reitz, Ritger, Roberts, Roberts, Rosenthal, Roth, Roth, Sachse, Sames, Sassen, Savard, Schlanger, Schlanger, Schouten, Schouten, Schwartz, Schweigert, Seilacher, Sellés-Martínez, Senowbari-Daryan, Senowbari-Daryan, Senowbari-Daryan, Shapiro, Sinninghe Damsté, Smrzka, Smrzka, Suess, Suess, Teichert, Thiel, Thierstein, Tong, Tribovillard, Von Rad, Wagner, Wagner, Wedepohl, Weissert, Weissert, Xu, Zwicker   +179 more
core   +1 more source

Chemical weathering of lower paleozoic black shales of south Sweden

Записки Горного института, 2018
Lower Paleozoic black shales are widespread in Sweden and form part of the Baltic paleobasin, which deposits are also known in Estonia and the Leningrad Oblast of Russia. These rocks are enriched in a carbon substance and characterized by the significant
D. O. Voronin, E. G. Panova
doaj   +1 more source

Cretaceous (Aptian/Albian-?Cenomanian) age of "black flysch" and adjacent deposits of the Grajcarek thrust-sheets in the Małe Pieniny Mts. (Pieniny Klippen Belt, Polish Outer Carpathians) [PDF]

, 2012
Several sections record the relation between the "black flysch" and Upper Cretaceous red shales in the Grajcarek thrust-sheets. In all the sections studied the "black flysch" appears in the core of imbricated folds or thrust-sheets, whereas the limbs are
Malata, Ewa, Olszewska, Barbara, Oszczypko, Nestor   +2 more
core   +1 more source

Binding of heavy metals by oxidised kerogen in (palaeo)weathered black shales [PDF]

, 2018
Sub-aerial weathering of black shales drives the gradual leaching of sulphur- and organic-bound heavy metal elements, which are usually abundant in these rocks due to depositional conditions. The formation of oxygen functional groups in kerogen, however,
Derkowski, Arkadiusz, Marynowski, Leszek
core   +1 more source

Geophysical characterization of black shales

Proceedings, 2012
Black shales are dark, thinly bedded sedimentary rocks deposited under anaerobic conditions. They are rich in carbon, sulfides and organic matter, and potentially can serve as hydrocarbon source rocks. Black shales may also contain significant enrichments of gas or oil (gas shales, oil shales).
Bauer, K., Streich, R., Adao, F., Bauman-Wilke, M., Ritter, O., Schovsbo, N., Spangenberg, E., Stiller, M.   +7 more
openaire   +4 more sources

Weathering of phosphorus in black shales [PDF]

Global Biogeochemical Cycles, 2002
Rock weathering is the ultimate source of phosphorus (P) to the oceans, where P can be a limiting nutrient for biological production. In this paper, P weathering is examined in soil chronosequences formed in weathering profiles on the organic‐rich Woodford Shale, New Albany Shale and Green River Shale.
Lauren Clark Kolowith, Lauren Clark Kolowith, Robert A. Berner   +2 more
openaire   +2 more sources

Fractionation Behavior of Chromium Isotopes during the Sorption of Cr (VI) on Kaolin and its Implications for Using Black Shales as a Paleoredox Archive

Geochemistry Geophysics Geosystems, 2019
Chromium stable isotope variations in marine black shales are increasingly used to constrain redox changes though time. However, how well black shale δ53Cr values represent ambient seawater δ53Cr values is difficult to assess as black shales contain both
A. Frank, R. Klaebe, R. Frei
semanticscholar   +1 more source

Diverse Deformation Mechanisms and Lithologic Controls in an Active Orogenic Wedge: Structural Geology and Thermochronometry of the Eastern Greater Caucasus

Tectonics, Volume 41, Issue 12, December 2022., 2022
Abstract Orogenic wedges are common at convergent plate margins and deform internally to maintain a self‐similar geometry during growth. New structural mapping and thermochronometry data illustrate that the eastern Greater Caucasus mountain range of western Asia undergoes deformation via distinct mechanisms that correspond with contrasting lithologies ...
A. R. Tye, N. A. Niemi, E. Cowgill, F. A. Kadirov, G. R. Babayev   +4 more
wiley   +1 more source

Low Carbon Black Shales of South and Parts of Central and Northern Urals: New Geochemical Characterization Data

Vestnik Permskogo Universiteta: Seriâ Geologiâ, 2017
We analyzed the distribution of wide range of trace elements in low-carbon shales of various Riphean, Vendian and Lower Paleozoic lithostratigraphic units of the South, Central, and southern part of the Northern Urals (Satka, Bolshoy Inzer, Suran, Yusha,
A. V. Maslov, G. A. Petrov, E. Z. Gareev
doaj   +1 more source

Hydrocarbon generation potential and organic matter accumulation patterns in organic-rich shale during the mesoproterozoic oxygenation event: evidence from the Xiamaling formation shale

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
A significant deposition of black shales occurred during the Mesoproterozoic Oxygenation Event (MOE). In order to investigate the hydrocarbon generation potential and organic matter enrichment mechanism of these shale deposits, we studied the Xiamaling ...
Huan Miao, Zhenxue Jiang, Xianglu Tang, Ze Deng, Chengju Zhang, Zhikai Liang, Yuguang Shi   +6 more
doaj   +1 more source