Results 81 to 90 of about 928 (188)

Paleoredox chemistry of Cenomanian–Coniacian black shales at high paleolatitudes: Implications for the extent of anoxia during OAE2 [PDF]

open access: yes, 2013
Cretaceous oceanic anoxic events (OAEs) have been studied in detail during the last decades. OAE2 is of particular interest as it reflects one of the largest perturbations of the global carbon cycle in the Mesozoic.
Hills, Len V   +3 more
core   +1 more source

Modeling the impacts of diagenesis on carbonate paleoredox proxies

open access: yesGeochimica et Cosmochimica Acta, 2022
Kimberly V. Lau, Dalton S. Hardisty
openaire   +1 more source

Geochemical Insights into the Paleodepositional Environment of the Garagu Formation, Gara Anticline, Kurdistan, Northern Iraq

open access: yesARO-The Scientific Journal of Koya University
The Garagu Formation is mostly composed of carbonate layers with iron-rich horizons in the middle part. The geochemical evidence for the paleodepositional environment of the Garagu Formation in the Kurdistan Region of Iraq’s Gara anticline has been ...
Tola A. Mirza   +2 more
doaj   +1 more source

Describing post-GOE oxygen availability with trace metal paleoredox proxies

open access: yes, 2017
Methods of describing local oxygen availability using coupled Mo isotopes and redox sensitive trace metal enrichments are applied to the Hotazel Iron Formation of the Transvaal Supergroup.
Stanford, Josh David
core   +1 more source

A Rezi Rzt-1 fúrás felső-triász képződményeinek szervetlen geokémiai jellemzői (Kösseni Formáció, Keszthelyi-hegység): őskörnyezeti tanulmány | Inorganic geochemical characteristics of the Upper Triassic rocks from borehole Rezi Rzt–1 (Kössen Formation, Keszthely Mountains, Hungary): a palaeoenvironmental study [PDF]

open access: yes, 2006
Tanulmányunkban a Dunántúli-középhegységből származó nori–rhaeti bitumenes márgák (Kösseni Formáció) szervetlen geokémiai adatait használtuk fel az üledékképződés őskörnyezeti viszonyainak jellemzésére.
Raucsikné Varga, Andrea Beáta   +2 more
core   +1 more source

Geochemical Dataset of Carbonate rocks in Kompina, N’kapa formation (North Western Douala sub-Basin, West Africa): Implication for depositional environment, paleoredox and paleoclimate

open access: yes
the dataset comprises of the geochemistry of Carbonate rocks in Kompina, N’kapa Formation (North Western Douala Sub-Basin, West Africa). The dataset comprises of selected Major element oxides and trace metals which are used to interpret sedimentological ...
eric, Bokanda Ekoko
core   +1 more source

Application of Molybdenum and Thallium Isotopes as Indicators of Paleoredox Conditions and Genesis of Hyper-Enriched Black Shale (HEBS) Deposits, Peel River, Yukon [PDF]

open access: yes, 2019
Hyper-enriched black shale (HEBS) deposits, such as those hosted in Devonian black shales of northern Yukon, are a globally significant source of a variety of economically important metals, particularly nickel, copper, zinc and platinum group elements ...
Crawford, Isobel
core  

Examining the limitations of 238U/235U in marine carbonates as a paleoredox proxy [PDF]

open access: yes, 2018
: Variations of 238U/235U in sedimentary carbonate rocks are being explored as a tool for reconstructing oceanic anoxia through time. However, the fidelity of this novel paleoredox proxy relies on characterization of uranium isotope geochemistry via ...

core  

Paleoenvironmental characteristics of continental shale and its significance to organic matter enrichment: Taking the fifth member of Xujiahe Formation in Tianfu area of Sichuan Basin as an example

open access: yesOpen Geosciences
Lake-phase organic-rich shales are widely developed in the fifth member (Xu5 Member) of the Triassic Xujiahe Formation in the Sichuan Basin. However, due to the lack of understanding of the paleoclimate and paleoenvironment, the mechanism of organic ...
Yang Jian   +8 more
doaj   +1 more source

Evaluating the Application of Elemental and Isotopic Ratios as Paleoredox Tracers in Earth's Oceans and Mars' Aqueous Alteration [PDF]

open access: yes
This dissertation critically evaluates the application of elemental and isotopic ratios as paleoredox tracers in early Earth’s oceans and on early Mars’ surface.
Liu, Xinyi
core   +1 more source

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