Results 21 to 30 of about 928 (188)
, 2020 Data used in tables and figures of manuscript 'Chromium isotope composition of organic-rich marine sediments and their mineral phases and its implications for using black shales as a paleoredox archive ...
Anja Frank (8620773) +2 more
core +3 more sources
The iron paleoredox proxies: A guide to the pitfalls, problems and proper practice [PDF]
American Journal of Science, 2018 Oceanic anoxia—including euxinic settings defined by the presence of water column hydrogen sulfide (H2S)—is minor in the ocean today. Such conditions, however, were common or even dominant in the past, particularly during the Precambrian and Phanerozoic oceanic anoxic events.
Raiswell, Rob +7 more
openaire +1 more source
Frontiers in Earth Science, 2022 Shanxi Formation Shan 23 Submember transitional shale in Eastern Ordos Basin is characterized by high TOC value, wide distribution, and large single-layer/cumulative thickness.
Yifan Gu +9 more
doaj +1 more source
Geofluids, 2021 How the geochemical characteristics of organic matter shale for the carbonate platform facies remain uncertain, which restricts an integrated reconstruction of the model of organic matter accumulation and preservation.
Ziya Zhang +5 more
doaj +1 more source
Thallium isotopes in early diagenetic pyrite – A paleoredox proxy? [PDF]
Geochimica et Cosmochimica Acta, 2011 This paper presents the first study of Tl isotopes in early diagenetic pyrite. Measurements from two sections deposited during the Toarcian Ocean Anoxic Event (T-OAE, ∼183 Ma) are compared with data from Late Neogene (<10 Ma) pyrite samples from ODP legs 165 and 167 that were deposited in relatively oxic marine environments.
Nielsen, S.G. +5 more
openaire +3 more sources
Frontiers in Earth Science, 2023 The organic-rich shale in the first member of the Qingshankou Formation, which is located in the southern Songliao Basin, is regarded as a high-quality source rock in East China.
Yan Ma, Yan Ma, Yan Ma, Feng Jinlai
doaj +1 more source
General geology and geochemistry of the Lokpanta Formation oil shale, Nigeria [PDF]
Oil Shale, 2021 A detailed geochemical and mineralogical study was carried out on the Lokpanta oil shale (OS), Nigeria. Samples from three drill cores and several outcrops were studied in order to understand OS general geochemistry and reconstruct tectonic and ...
Sylvester Ofili, Alvar Soesoo
doaj +1 more source
Geochemical indices and palynology comparison used for paleoproductivity and paleoredox conditions of the Huai Hin Lat Formation in part of Loei-Petchabun Fold Belt in central Thailand [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2020 Petrography and geochemistry analyzing Dat Yai section can describe paleoproductivity and past-redox condition. Paleoproductivity proxies consisted of AOM, phytoclast, TOC, excess SiO2, Ba/Al, and P/Al as high values through sections which similarly ...
Boonnarong Arsairai +4 more
doaj +1 more source
Frontiers in Earth Science, 2019 Diverse studies predict global expansion of Oxygen Minimum Zones (OMZs) as a consequence of anthropogenic global warming. While the observed dissolved oxygen concentrations in many coastal regions are slowly decreasing, sediment core paleorecords often ...
Konstantin Choumiline +4 more
doaj +1 more source
BSGF - Earth Sciences Bulletin, 2021 Two redox-sensitive metalloids, arsenic (As) and antimony (Sb), are examined here to determine what can be their help in the deciphering of past depositional conditions.
Tribovillard Nicolas
doaj +1 more source