Postdepositional Behavior of Molybdenum in Deep Sediments and Implications for Paleoredox Reconstruction [PDF]
Geophysical Research Letters, 2023 Molybdenum (Mo) is a trace element sensitive to oceanic redox conditions. The fidelity of sedimentary Mo as a paleoredox proxy of coeval seawater depends on the extent of Mo remobilization during postdepositional processes. Here we present the Mo content
Jingbo Nan +6 more
doaj +5 more sources
A quantification of the effect of diagenesis on the paleoredox record in mid-Proterozoic sedimentary rocks [PDF]
Geology, 2021 Abstract Iron speciation in ancient sedimentary rocks is widely used to reconstruct oceanic redox conditions over geological time, specifically to assess the extent of oxic, euxinic (anoxic containing sulfide), and ferruginous (anoxic containing iron) conditions.
Hutchings, Alec M, Turchyn, Alexandra V
core +7 more sources
The paleoredox setting of Burgess Shale-type deposits
Palaeogeography, Palaeoclimatology, Palaeoecology, 2010 Abstract Burgess Shale-type (BST) biotas occur globally in Lower and Middle Cambrian shales, and were preserved under specific and exceptional circumstances. Among the circumstances surrounding fossilization, benthic redox conditions have been the subject of particular disagreement.
Robert R. Gaines, Mary L. Droser
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Geofluids, 2023 Organic-rich continental shale, widespread in the Sichuan Basin during the deposition of the Jurassic Dongyuemiao Member (J1d), is considered the next shale hydrocarbon exploration target in southern China.
Yadong Zhou +8 more
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Application of the Ce anomaly as a paleoredox indicator: The ground rules
Paleoceanography, 1990 Much attention has been paid, in recent years, to the potential application of the Ce anomaly, measured in various marine phases, as a paleoceanographic indicator of widespread marine anoxia. In this paper we present and discuss results from recent studies of present‐day rare earth element (REE) distributions (and hence Ce anomaly distributions) in the
Christopher R. German, Henry Elderfield
openaire +2 more sources
Brazilian Journal of Geology, 2016 : Paleoredox indicators were used to assess the depositional environment of the Permian Irati Formation, and discuss the controls on the accumulation of organic-rich sediments.
Karin Goldberg, Munir Humayun
doaj +3 more sources
Thallium Isotopes Across the Smithian-Spathian Boundary: Evidence for Anoxia Throughout Most of the Early Triassic. [PDF]
GeobiologyABSTRACT Following the largest known Phanerozoic extinction, the end‐Permian mass extinction, the Early Triassic is often considered an interval of slow biotic recovery. During this time, the minor Smithian‐Spathian extinction occurred, further delaying the biotic recovery of this epoch.
Newby SM, Owens JD, Young SA, Hammer Ø.
europepmc +2 more sources
Localized and Transient Oxygenation of Shallow Oceans of Southwestern Laurentia at the Ediacaran-Cambrian Boundary. [PDF]
GeobiologyABSTRACT The Ediacaran–Cambrian boundary, which precedes one of the most significant biotic diversification events in Earth's history, is associated with a global negative carbon isotope excursion termed the BAsal Cambrian carbon isotope Excursion (BACE).
Chanchai W +6 more
europepmc +2 more sources
Marcasite at the Permian‐Triassic Transition
Geophysical Monograph Series, Page 377-399., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Elena Lounejeva +7 more
wiley +2 more sources
Holocene Spatiotemporal Redox Variations in the Southern Baltic Sea
Frontiers in Earth Science, 2021 Low oxygen conditions in the modern Baltic Sea are exacerbated by human activities; however, anoxic conditions also prevailed naturally over the Holocene. Few studies have characterized the specific paleoredox conditions (manganous, ferruginous, euxinic)
Dalton S. Hardisty +5 more
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