| | Journal (article/letter/editorial) | reef-hosted Jiaodingshan Mn–Co deposit and Dawashan Mn deposit, Sichuan Province, China Delian Fan a...Academy of Sciences, PO Box 9825, Beijing 100029, China U.S. Geological SurÕey, Coastal and Marine Geology...accepted 22 March 1999 Abstract The Jiaodingshan Mn–Co and Dawashan Mn deposits are located in the approximately...submarine rise and the Kangdian continent. The Jiaodingshan and Dawashan deposits occur in algal-reef facies...mainly composed of rhodochrosite, kutnahorite, hausmannite, braunite, manganosite, and bementite. Dark red | | Munteanu, Marian, Marincea, Stefan, Kasper, Haino Uwe, Zak, Karel, Alexe, Veronica, Trandafir, Vasile, Saptefrati, George, Mihalache, Angela (2004) Black chert-hosted manganese deposits from the Bistritei Mountains, Eastern Carpathians (Romania): petrography, genesis and metamorphic evolution. Ore Geology Reviews, 24 (1) 45-65 doi:10.1016/j.oregeorev.2003.08.004 | Journal (article/letter/editorial) | carbonate – silicate orebodies (Fe-rhodochrosite, Mn-amphibole, spessartine, stilpnomelane, rhodonite...bottom water of a back-arc basin and precipitated as Mn carbonate and oxide. The metamorphism of ECMD is...by the extensive replacement of silicate phases by Mn carbonate and, locally, by iron sulfide, as a result...2003 Elsevier B.V. All rights reserved. Keywords: Mn deposits; Black shale; Rare-earth elements; C and...genetic relation between them. The ready change of the Mn oxidation state and solubility at slight pH – Eh | | | Journal (article/letter/editorial) | rock-hosted deposits can also be identified: those with Mn derived via upwelling from oxygen-minimum zones and...additional strong peak in the Oligocene. Therefore, Mn is not controlled entirely by the level of oxygen...oxygen in the Earth’s atmosphere. At each peak of Mn deposition, the associated ore deposits are concentrated...There is a conspicuous gap in sedimentary rock-hosted Mn deposits between 1800 and 800 Ma that may correspond...but one without sulfidic deep water. Alternatively, Mn may have been precipitated entirely in the deep ocean |
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