Book ChapterDOI
Manganiferous Sediments, Rocks, and Ores
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TLDR
The solubility of manganese compared to iron under reducing and mildly oxidizing conditions leads to its export from low-oxygen environments, be they basalt-hydrothermal systems or euxinic sedimentary basins, and its accumulation in oxidizing environments of the shallow ocean or in low-productivity areas of the deep sea as discussed by the authors.Abstract:
Manganese is of great interest in geochemistry because its minerals are both tracers of redox processes and accumulators of other elements of geochemical significance. The solubility of manganese compared to iron under reducing and mildly oxidizing conditions leads to its export from low-oxygen environments, be they basalt-hydrothermal systems or euxinic sedimentary basins, and its accumulation in oxidizing environments of the shallow ocean or in low-productivity areas of the deep sea. Therefore tracking Mn/Fe ratios provides us a means of reconstructing the oxidation structure of ocean basins, soils, or groundwater systems.read more
Citations
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Journal ArticleDOI
Iron Formation: The Sedimentary Product of a Complex Interplay among Mantle, Tectonic, Oceanic, and Biospheric Processes
Andrey Bekker,Bryan Krapež,John F. Slack,Noah J. Planavsky,Axel Hofmann,Kurt O. Konhauser,Olivier Rouxel +6 more
TL;DR: In this article, it was shown that occurrences of BIF, GIF, Pherozoic ironstones, and exhalites surrounding VMS systems are linked to diverse environmental changes.
Journal ArticleDOI
Evidence for Paleoproterozoic cap carbonates in North America
TL;DR: The early Paleoproterozoic Snowy Pass Supergroup of the Medicine Bow Mountains and Sierra Madre, USA and Huronian Supergroup, Ontario, Canada were deposited along the present-day southern flank of the Wyoming and Superior cratons.
Journal ArticleDOI
A review of the implications and challenges of manganese removal from mine drainage.
TL;DR: This review provides a comprehensive assessment of the main implications and challenges of Mn treatment in mine drainage and highlights both their design criteria and operation requirements, as well as the factors that influence Mn removal efficiency.
Journal ArticleDOI
Genesis of Cryogenian Datangpo manganese deposit: Hydrothermal influence and episodic post-glacial ventilation of Nanhua Basin, South China
Wenchao Yu,Wenchao Yu,Thomas J. Algeo,Thomas J. Algeo,Yuansheng Du,Barry Maynard,Hua Guo,Qi Zhou,Touping Peng,Ping Wang,Liangjun Yuan +10 more
TL;DR: In this article, a metallogenic model for the Datangpo Formation manganese deposits was proposed based on the observation that the Mn-ore samples have compositions consistent with at least partial derivation from hydrothermal sources and the likely source of the nonradiogenic siliciclastic material is weathering of Neoproterozoic continental flood basalts on the Yangtze Block.
Journal ArticleDOI
A high-resolution, multiproxy stratigraphic analysis of the Devonian–Carboniferous boundary sections in the Moravian Karst (Czech Republic) and a correlation with the Carnic Alps (Austria)
TL;DR: In this paper, a multidisciplinary correlation of the Devonian-Carboniferous boundary sections from the Moravian Karst (Czech Republic) and the Carnic Alps (Austria), based on conodont and foraminifer biostratigraphy, microfacies analysis, field gamma-ray spectroscopy (GRS), carbon isotopes and element geochemistry, is presented.
References
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Book
Heavy metals in soils
TL;DR: In this article, the origin of heavy metals in soils is discussed, and methods of analysis for heavy metal analysis in soils are presented, as well as the potential environment significance of less abundant elements.
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.
Journal ArticleDOI
Manganese oxide minerals: Crystal structures and economic and environmental significance
TL;DR: The crystal structures for todorokite and birnessite, two of the more common Mn oxide minerals in terrestrial deposits and ocean nodules, were determined by using powder x-ray diffraction data and the Rietveld refinement method.
Journal ArticleDOI
Biogenic manganese oxides: Properties and mechanisms of formation
Bradley M. Tebo,John R. Bargar,Brian G. Clement,Gregory J. Dick,Karen J. Murray,Dorothy L. Parker,Rebecca Verity,Samuel M. Webb +7 more
TL;DR: The primary Mn(IV) biooxide formed is a phyllomanganate most similar to δ-MnO2 or acid birnessite, and metal sequestration by the Mn biooxides occurs predominantly at vacant layer octahedral sites.
Journal ArticleDOI
Mo–total organic carbon covariation in modern anoxic marine environments: Implications for analysis of paleoredox and paleohydrographic conditions
Thomas J. Algeo,Timothy W. Lyons +1 more
TL;DR: In this paper, a detailed analysis of [Mo]s-total organic carbon (TOC) covariation in modern anoxic marine environments and its relationship to ambient water chemistry is presented.