 | | Journal (article/letter/editorial) | | Mineralogical characterization of the Nkamouna Co–Mn laterite ore, southeast Cameroon G. Lambiv Dzemua & S. A. Gleeson...June 2012 # Springer-Verlag 2012 Abstract The Nkamouna property is an oxide laterite deposit developed...developed on serpentinized peridotite in southeast Cameroon. It is enriched in Co and Mn, has sub-economic Ni...Museum, London SW7 5BD, UK lithiophorite makes Nkamouna ore amenable to physical beneficiation, producing...higher than the run-of-mine ore. Keywords Asbolane . Lithiophorite . Nkamouna . Cameroon . Cobalt laterite |  | | Journal (article/letter/editorial) | | Petrography, Mineralogy, and Geochemistry of the Nkamouna Serpentinite: Implications for the Formation of...the Cobalt-Manganese Laterite Deposit, Southeast Cameroon GIDEON LAMBIV DZEMUA† AND SARAH A. GLEESON Department...The Nkamouna Co-Mn-Ni laterite is an advanced exploration project located in southeast Cameroon. The...The deposit comprises a deep and complex laterite profile with high Co (~0.25 wt %) and Mn (1.33 wt %) contents...grade and a Ni:Co ratio of less than 3. This makes Nkamouna an unusual type of laterite deposit as it will |  | | Report (issue) | | Its presence may indicate significant mafic-ultramafic rocks in the local basement. The balance of primary...arc and rift environments associated with mafic-ultramafic rocks. Metasedimentary cobalt-copper-gold deposits...these deposit types show direct links to mafic-ultramafic rocks; the deposits may result from crustal-scale...depths. Hydrothermal deposits associated with ultramafic rocks, typified by the Bou Azzer district of...Archean and Proterozoic rocks of the Midwest and the east coast (Pennsylvania) and younger mafic rocks in |  | | Report (issue) | | .pdf. Cover. Underground photo of the Skuterud Mine in Norway showing pink secondary erythrite (a hydrated.......................................F13 Typical Mine Life.......................................................................................F15 Ultramafic Igneous Rocks..............................................................................F16 Mine Waste Characteristics.........................................................................F18 Mine Closure........................................ |  | | Journal (article/letter/editorial) | | mantle sequence (the Semail ophiolite) onto the East Arabian margin during the late Cretaceous. The laterites... Ni concentrations average 0.63% (Ibra), 0.72% (East Ibra), 0.67% (Al-Russayl), and 0.33% (Tiwi). Other...Al-Khirbash (2015) concluding that the Ibra and East Ibra laterites are of the silicate type, while that...(1998). To attain a better understanding of the complex processes involved in laterite formation and the...study belonged to four separate areas, namely Ibra, East Ibra, Tiwi, and Al-Russayl. The Ibra profile is located |  | Mongelli, Giovanni, Taghipour, Batoul, Sinisi, Rosa, Khadivar, Shirin (2019) Mineralization and element redistribution in the Chah-Gheib Ni-laterite ore zone, Bavanat, Zagros Belt, Iran. Ore Geology Reviews, 111. 102990 doi:10.1016/j.oregeorev.2019.102990 | Journal (article/letter/editorial) | | derived from the weathering of ± serpentinized ultramafic 12 rocks and they commonly accounts for over...world land-based Ni resources. Serpentinized 13 ultramafic rocks outcrop extensively in Iran as result of...Two Ni-bearing laterite belts developed on the ultramafic 15 rocks of the Neyriz ophiolite have been...been recently discovered in the Bavanat region (South Iran). The 16 Chah-Gheib deposit, as the biggest...the chemical weathering of serpentinized 47 ultramafic lithologies (Freyssinet et al., 2005, Butt and |  | Dybowska, Agnieszka, Schofield, Paul, Newsome, Laura, Herrington, Richard, Mosselmans, Julian, Kaulich, Burkhard, Kazemian, Majid, Araki, Tohru, Skiggs, Thomas, Kruger, Jens, Oxley, Anne, Norman, Rachel, Lloyd, Jonathan (2022) Evolution of the Piauí Laterite, Brazil: Mineralogical, Geochemical and Geomicrobiological Mechanisms for Cobalt and Nickel Enrichment. Minerals, 12 (10) 1298 doi:10.3390/min12101298 | Journal (article/letter/editorial) | | are associated with both the original intrusive complex and also the nature of fluid flow, redox cycling...environments through extensive weathering of ultramafic rocks. Variations in climate, weathering and...Kazakhstan, Russia, Turkey, Greece, and the Balkan region of Europe e.g., [11,14,16], and these deposits...after [24]. (B) A geological map of the Brejo Seco Complex with the location of the Piauí deposit shown by...mafic-ultramafic Brejo Seco– Piauí Complex in the São Francisco craton [20,24,25]. The complex is bound |  | | Journal (article/letter/editorial) | | weathering solutions, causing the formation of complex mineralogical associations (Burns and Burns 1979;...gtz e Tibet Ri Sichuan ve r Zejiang Hunan East China Sea Jiangxi jia n INDIA DXQ Ta iw a n...chert Carboniferous Limestone and dolomite Devonian Limestone, dolomite,and sandstone Ordovician Zhushan...of slates, shales, sandstones, siltstones, and dolomite intercalations. The Devonian and Carboniferous...sample (Vasconcelos 1999). Sample SK-14 yielded a complex spectrum with no plateau age (Fig. 9f). Such an |  | Brinza, Loredana, Quinn, Paul D., Schofield, Paul F., Mosselmans, J. Frederick W., Hodson, Mark E. (2013) Incorporation of strontium in earthworm-secreted calcium carbonate granules produced in strontium-amended and strontium-bearing soil. Geochimica et Cosmochimica Acta, 113. 21-37 doi:10.1016/j.gca.2013.03.011 | Journal (article/letter/editorial) | | analysed by ICP-OES. The certified reference material dolomite BCS No386 was also digested following this method...different species kept in soils collected from the Yate region by Morgan et al. (2001, 2002) but Ca concentrations...calcitic in nature. Small differences in the post-edge region of these spectra exist, specifically in the shape...indicative of vaterite. The difference in the pre-edge region between the two polymorphs is clearly shown in...distribution of atoms about the Ca in vaterite is more complex than that of calcite. The “standard” crystallographic |  | | Report (issue) | | .B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agency’s...production, U.S. apparent consumption, and U.S. mine production of antimony from 1900 to 2012............................F2 Graph showing world cobalt mine and refinery production and apparent consumption.....................F2 Graph showing world cobalt mine production from 1950 to 2011......................F4. Pie chart showing percentage of world cobalt mine production in 2011, by country................. |
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