Highly fractionated chromium isotopes in Mesoproterozoic-aged shales and atmospheric oxygen [PDF]
Nature Communications, 2018 There is a long standing debate whether low atmospheric oxygen levels during the Mesoproterozoic Era hindered the evolution of crown-group animals. Here, the authors show with shale-hosted chromium isotopes that sufficient atmospheric oxygen for crown ...
Donald E. Canfield +7 more
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Mechanisms of chromium isotope fractionation and the applications in the environment
Ecotoxicology and Environmental Safety, 2022 Chromium (Cr) is a toxic heavy metal that gives rise to environmental pollution and human risk. Chromium stable isotopes have a wide range of applications in both environmental field and earth science field.
Xue Tang, Scott S Hughes
exaly +3 more sources
Summit of the N=40 island of inversion: Precision mass measurements and ab initio calculations of neutron-rich chromium isotopes [PDF]
Physics Letters B, 2022 Mass measurements continue to provide invaluable information for elucidating nuclear structure and scenarios of astrophysical interest. The transition region between the Z=20 and 28 proton shell closures is particularly interesting due to the onset and ...
R. Silwal +26 more
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Chromium isotope constraints on deep mantle oxidation from the Early Archean to Paleoproterozoic [PDF]
Nature CommunicationsThe evolution of Earth’s mantle redox state is central to understanding the rise of atmospheric oxygen and the development of a habitable planet. However, whether the deep mantle has become increasingly oxidized over geological time and its underlying ...
Li-Juan Xu +10 more
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Trivalent chromium isotopes in the eastern tropical North Pacific oxygen-deficient zone [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2021 Edward A. Boyle +2 more
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Method validation and geochemical modelling of chromium speciation in natural waters [PDF]
Scientific ReportsThe study focuses on validating reference methods such as ICP-OES and ICP-MS for detecting ultra-trace levels of chromium in groundwater, where concentrations are typically very low.
Piotr Rusiniak +3 more
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Determination of Trace Elements in Nickel-based High-temperature Alloy by High Resolution Plasma Mass Spectrometry [PDF]
Zhipu Xuebao, 2023 The nickel content of nickel-based high-temperature alloy is between 50% and 70%, and the alloy contents of chromium, iron, cobalt, molybdenum, aluminum, titanium and tungsten are within 20%.
HU Xuan1 +6 more
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Biogeochemical cycling of chromium and chromium isotopes in the sub-tropical North Atlantic Ocean
Frontiers in Marine Science, 2023 Chromium (Cr) is a redox-sensitive element and because Cr isotopes are fractionated by redox and/or biological processes, the Cr isotopic composition of ancient marine sediments may be used to infer changes in past seawater oxygenation or biological ...
Wenhao Wang +6 more
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Chromium Cycling in Redox‐Stratified Basins Challenges δ53Cr Paleoredox Proxy Applications
Geophysical Research Letters, 2022 Chromium stable isotope composition (δ53Cr) is a promising tracer for redox conditions throughout Earth's history; however, the geochemical controls of δ53Cr have not been assessed in modern redox‐stratified basins.
David J. Janssen +10 more
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Modeling the marine chromium cycle: new constraints on global-scale processes [PDF]
Biogeosciences, 2021 Chromium (Cr) and its isotopes hold great promise as a tracer of past oxygenation and marine biological activity due to the contrasted chemical properties of its two main oxidation states, Cr(III) and Cr(VI), and the associated isotope fractionation ...
F. Pöppelmeier +8 more
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