Results 141 to 150 of about 928 (188)

Latitudinal manganese gradient dynamics associated with Earth's major ice ages. [PDF]

Nat Commun
Wang X, Pohl A, Rickaby REM, Lu Z.
europepmc   +1 more source

Geochemistry and Origin of Deep and Ultradeep Crude Oils from the Jurassic Qigu Formation, Yongjin Area, Central Junggar Basin, NW China. [PDF]

ACS Omega
Qu Y, Qiao J, Zhong N, Li W, Zhang G, Yu H, Wang G, Yan F.   +7 more
europepmc   +1 more source

Organic and inorganic geochemical cyclicity of a Maastrichtian oceanic open-shelf carbonate source rock. [PDF]

Sci Rep
Usman M, Ardila-Sanchez M, Idiz E, Abu-Mahfouz IS, van Buchem F, Vahrenkamp V.   +5 more
europepmc   +1 more source

Miocene ocean circulation shifted expansive oxygen deficient zones to the Atlantic. [PDF]

Nat Commun
Burke JE, Cheng K, Ridgwell A, Penman DE, Hardisty DS.   +4 more
europepmc   +1 more source

Geochemical and mineralogical characteristics of shales from the early to middle Permian Dohol Formation in Peninsular Malaysia: Implications for organic matter enrichment, provenance, tectonic setting, palaeoweathering and paleoclimate. [PDF]

Heliyon
Rashid A, Siddiqui NA, Ahmed N, Wahid A, Jamil M, Sankoh AA, Olutoki JO.   +6 more
europepmc   +1 more source

Sea level controls on Ediacaran-Cambrian animal radiations. [PDF]

Sci Adv
Bowyer FT, Wood RA, Yilales M.
europepmc   +1 more source

The Iron Speciation Paleoredox Proxy

, 2021
In one form or another, iron speciation has had a long history as a paleoredox proxy. The technique has been refined considerably over the years, and the most recent scheme is unique in its potential to distinguish three major oceanic redox states - oxygenated, ferruginous and euxinic.
Simon Poulton
exaly   +10 more sources

Redox-Sensitive Trace Metals as Paleoredox Proxies: A Review and Analysis of Data From Modern Sediments [PDF]

Earth-Science Reviews, 2020
Abstract Redox-sensitive trace metals have been used extensively as geochemical proxies to infer the redox-status of marine sediments at the time of their deposition, and by extension, the concentration of oxygen in the overlying water and atmosphere.
Donald Canfield, William W Bennett
exaly   +5 more sources

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Cerium Anomalies and Paleoredox

2021
Ce anomalies track changes in oxygen availability due to the anomalous redox-sensitivity of Ce compared with the other rare earth elements. The proxy systematics have been calibrated experimentally as well as in modern anoxic water bodies. Ce anomalies are unique because they track intermediate manganous conditions, rather than fully anoxic conditions.
Rosalie Tostevin
exaly   +2 more sources