Journal ArticleDOI
Mo isotope fractionation during adsorption to Fe (oxyhydr)oxides
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TLDR
In this article, the isotopic fractionation of Mo during adsorption to a range of Fe (oxyhydr)oxides, under variable Mo/Fe-mineral ratios and pH, was investigated.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 2009-11-01. It has received 255 citations till now. The article focuses on the topics: Isotope fractionation.read more
Citations
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Journal ArticleDOI
Contrasting molybdenum cycling and isotopic properties in euxinic versus non-euxinic sediments and sedimentary rocks: Refining the paleoproxies
Clint Scott,Timothy W. Lyons +1 more
TL;DR: In this article, the authors present a discussion of the Mo geochemistry of non-euxinic sediments, where hydrogen sulfide is sometimes present yet always restricted to pore waters.
Journal ArticleDOI
Evidence for oxygenic photosynthesis half a billion years before the Great Oxidation Event
Noah J. Planavsky,Dan Asael,Axel Hofmann,Christopher T. Reinhard,Stefan V. Lalonde,Andrew Knudsen,Xiangli Wang,Xiangli Wang,Frantz Ossa Ossa,Ernesto Pecoits,Albertus J. B. Smith,Nicolas J. Beukes,Andrey Bekker,Thomas M. Johnson,Kurt O. Konhauser,Timothy W. Lyons,Olivier Rouxel +16 more
TL;DR: The early Earth was characterized by the absence of oxygen in the ocean-atmosphere system, in contrast to the well-oxygenated conditions that prevail today as discussed by the authors, and the evolution of oxygenic photosynthesis is generally accepted to have been the ultimate cause of this rise.
Journal ArticleDOI
Metal Stable Isotope Signatures as Tracers in Environmental Geochemistry
TL;DR: This review presents the application of metal stable isotopes as source and process tracers in environmental studies, in particular by using mixing and Rayleigh model approaches and the extent of natural isotopic variations for different elements is compared.
Journal ArticleDOI
Early diagenesis of redox-sensitive trace metals in the Peru upwelling area – response to ENSO-related oxygen fluctuations in the water column
TL;DR: In this article, the authors evaluate the respective mechanisms of trace metal accumulation, retention and remobilization across the oxygen minimum zone (OMZ) and with respect to oxygen fluctuations in the water column related to the El Nino Southern Oscillation (ENSO).
Journal ArticleDOI
Molybdenum in natural waters: A review of occurrence, distributions and controls
TL;DR: The 2011 WHO Guidelines for Drinking-Water Quality (fourth edition) advised a health-based value of 70μg/L for Mo but this is no longer promulgated as a formal guideline value as WHO consider such concentrations to be rarely found in drinking water as discussed by the authors.
References
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Journal ArticleDOI
Ferrozine---a new spectrophotometric reagent for iron
TL;DR: The ferroin group has been known to react as bidentate ligands with certain metal ions such as ferrous, cuprous, and cobaltous, to give colored complex species.
Book ChapterDOI
The Iron Oxides
R. M. Cornell,U. Schwertmann +1 more
TL;DR: The food-quality iron oxides are primarily distinguished from technical grades by their comparatively low levels of contamination by other metals; this is achieved by the selection and control of the source of the iron or by the extent of chemical purification during the manufacturing process as discussed by the authors.
Journal ArticleDOI
Early oxidation of organic matter in pelagic sediments of the eastern equatorial Atlantic: suboxic diagenesis
Philip N. Froelich,Gary P. Klinkhammer,Michael L. Bender,Nile A. Luedtke,G.R. Heath,Doug Cullen,Paul Dauphin,Doug Hammond,Blayne Hartman,Val Maynard +9 more
TL;DR: Pore water profiles of total CO 2, pH, PO 3−4, NO − 3 plus NO − 2, SO 2− 4, S 2−, Fe 2+ and Mn 2+ have been obtained in cores from pelagic sediments of the eastern equatorial Atlantic under waters of moderate to high productivity as mentioned in this paper.
Book
Aqueous Environmental Geochemistry
TL;DR: The Geochemistry of Clay Minerals: Actinides and Their Daughter and Fission Products as mentioned in this paper, a book about the geochemistry of clay minerals, is a good starting point for this discussion.
Book
The chemical evolution of the atmosphere and oceans
TL;DR: Holland et al. as mentioned in this paper reconstruct the chemical evolution of the Earth's atmosphere and oceans using data from a wide spectrum of fields to trace the history of the ocean-atmosphere system.
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