 | | 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 |  | Aiglsperger, Thomas, Proenza, Joaquin A., Zaccarini, Federica, Lewis, John F., Garuti, Giorgio, Labrador, Manuel, Longo, Francisco (2015) Platinum group minerals (PGM) in the Falcondo Ni-laterite deposit, Loma Caribe peridotite (Dominican Republic) Mineralium Deposita, 50 (1) 105-123 doi:10.1007/s00126-014-0520-9 | Journal (article/letter/editorial) | | Republic and developed above ophioliterelated ultramafic rocks (Loma Caribe peridotite) which crop out...mantle forming part of a dismembered ophiolite complex. It mainly consists of harzburgite with small masses...plume-related oceanic plateau basalts (Duarte Complex; upper Jurassic to lower Cretaceous) and to its...unconformably overlain by volcanic rocks: the Duarte Complex by the Peralvillo Formation (basaltic rocks; Late...diabases, and basalts emerge as the Río Verde Complex (Fig. 1; Lewis et al. 2002; Escuder Viruete et |  | Domènech, Cristina, Villanova-de-Benavent, Cristina, Proenza, Joaquín A., Tauler, Esperança, Lara, Laura, Galí, Salvador, Soler, Josep M., Campeny, Marc, Ibañez-Insa, Jordi (2022) Co–Mn Mineralisations in the Ni Laterite Deposits of Loma Caribe (Dominican Republic) and Loma de Hierro (Venezuela) Minerals, 12 (8) 927 doi:10.3390/min12080927 | Journal (article/letter/editorial) | | Mn-oxyhydroxide minerals, with a composition between Ni asbolane and lithiophorite, although a Co association with...Keywords: nickel; cobalt; manganese; lithiophorite; asbolane; critical metals; laterite Publisher’s Note:...magmatic Ni–Cu sulphide deposits hosted in mafic and ultramafic rocks, such as Sudbury (Canada) or Norilsk (Russia)...Indonesia, the Philippines, Brazil, Cameroon, Greece and the Caribbean region ([2,3,6] and references therein)...laterite deposits result from the weathering of ultramafic rocks (generally serpentinised peridotites) at |  | Dublet, Gabrielle, Juillot, Farid, Brest, Jessica, Noël, Vincent, Fritsch, Emmanuel, Proux, Olivier, Olivi, Luca, Ploquin, Florian, Morin, Guillaume (2017) Vertical changes of the Co and Mn speciation along a lateritic regolith developed on peridotites (New Caledonia) Geochimica et Cosmochimica Acta, 217. 1-15 doi:10.1016/j.gca.2017.07.010 | Journal (article/letter/editorial) | | Monchoux, 1991), Cuba (RoqueRosell et al., 2010) and Cameroon (Dzemua et al., 2013). However, selective chemical...knowledge, the effect of the weathering of these ultramafic rocks on the evolution of Co and Mn speciation...incised peneplain capped by an iron pan in the Goro region (Southern Province; Figure 1). A previous study...(#00-029-0041), talc (#00-019-0770), quartz (#00005-0490), asbolane (#00-043-1459), lithiophorite (#00-041-1378),...32.5 m) suggest the occurrence of the Mnoxides asbolane and/or lithiophorite (Figure 2b; Dublet et al |  | Fu, Wei, Feng, Yangyang, Luo, Peng, Zhang, Yinmeng, Huang, Xiaorong, Zeng, Xiangwei, Cai, Qian, Zhou, Yongzhang (2019) Weathering of Ophiolite Remnant and Formation of Ni Laterite in a Strong Uplifted Tectonic Region (Yuanjiang, Southwest China) Minerals, 9 (1) 51 doi:10.3390/min9010051 | Journal (article/letter/editorial) | | Formation of Ni Laterite in a Strong Uplifted Tectonic Region (Yuanjiang, Southwest China) Wei Fu 1,2, * , Yangyang...China 1. Introduction Chemical weathering of ultramafic rocks has produced numerous lateritic profiles...accretionary belts or komatiites and layered ultramafic rocks in stable cratonic blocks [4,5]. In the...laterite profiles record the complex lateritization history of ultramafic rocks [7,21]. (3) Supergene...supergene Ni enrichment remain enigmatic due to the complex parent rock lithologies and local environmental |  | | 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 |  | 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...there are three types of Mn oxy-hydroxide, asbolane, asbolane-lithiophorite intermediates and romanechite...substituted directly into the MnO6 layers of the asbolane-lithiophorite intermediates. However significant...significant levels of Co2+ are evident within the asbolane-lithiophorite intermediates, structurally bound along...environments through extensive weathering of ultramafic rocks. Variations in climate, weathering and |  | | Journal (article/letter/editorial) | | manganese oxyhydroxides in laterite developed on ultramafic rocks Carmela Alen J. Tupaz1 Takuya Echigo1 ...(Mn)-oxyhydroxides (lithiophorite, asbolane, lithiophorite-asbolane intermediate) are typically fine-grained...amorphous to cryptocrystalline. Lithiophorite, asbolane and their intermediates were properly distinguished... and Fe. The band shift from lithiophorite to asbolane end terms in the 486–593 cm 1 domain indicates... which are products of intense weathering of ultramafic rocks such as dunite, harzburgite, and their |  | Aiglsperger, Thomas, Proenza, Joaquin A., Lewis, John F., Labrador, Manuel, Svojtka, Martin, Rojas-Purón, Arturo, Longo, Francisco, Ďurišová, Jana (2016) Critical metals (REE, Sc, PGE) in Ni laterites from Cuba and the Dominican Republic. Ore Geology Reviews, 73. 127-147 doi:10.1016/j.oregeorev.2015.10.010 | Journal (article/letter/editorial) | | major AC ore deposits in South Africa (Bushveld complex) and Russia (Norilsk) (USGS 2013). Supply risks...instabilities can occur when producers suffer full-scale mine shutdowns as seen during several strikes held by...associated with near-surface modification of ultramafic rocks could help to minimize supply risks of...laterites have developed from weathering of hydrated ultramafic rocks of the Moa-Baracoa ophiolitic massif. This...Marchesi et al., 2006; Proenza et al., 2006). The ultramafic rocks are mainly harzburgites (more than 70%) |  | Economou-Eliopoulos, Maria, Laskou, Magdalena, Eliopoulos, Demetrios, Megremi, Ifigeneia, Kalatha, Sofia, Eliopoulos, George (2021) Origin of Critical Metals in Fe–Ni Laterites from the Balkan Peninsula: Opportunities and Environmental Risk. Minerals, 11 (9) 1009 doi:10.3390/min11091009 | Journal (article/letter/editorial) | | ΣREE), and REE-minerals along with Ni, Co, and Mn (asbolane and silicates) towards the lowermost part of the...water leachates for laterite samples, altered ultramafic rocks and soils neighboring the mining areas...laterites developed by chemical weathering of ultramafic rocks with potential post redeposition enrichment...weathering/alteration of laterite deposits and parent ultramafic rocks, mining, and large volumes of smelting...mainly related to the extensive lateritization of ultramafic ophiolites in the Balkan Peninsula (Shebenik–Pogradec |  | | 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...concentrations average 0.63% (Ibra), 0.72% (3 profiles, East Ibra), 0.67% (3 profiles, Al-Russayl), and 0.33%...Ni-bearing minerals. This study showed that the Ibra, East Ibra and Tiwi laterites are similar to the other...development of the laterites in the Oman Mountain region has been given in Lippard et al. (1986), Skelton...areas, namely Ibra (N 22°48′14.3″/E 58°45′1.5″), East Ibra (N 22°49′49.7″/E 58°50′51.9″), Tiwi (N 22°47′48 |  | | 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...sample (Vasconcelos 1999). Sample SK-14 yielded a complex spectrum with no plateau age (Fig. 9f). Such an...explanation is that Co is hosted in a hybrid phase of asbolane within lithiophorite (Manceau et al. 1987). In...analysis. This was not the case and the presence of asbolane in lithiophorite as therefore ruled out. The other |  | Dublet, Gabrielle, Juillot, Farid, Morin, Guillaume, Fritsch, Emmanuel, Fandeur, Dik, Ona-Nguema, Georges, Brown, Gordon E. (2012) Ni speciation in a New Caledonian lateritic regolith: A quantitative X-ray absorption spectroscopy investigation. Geochimica et Cosmochimica Acta, 95. 119-133 doi:10.1016/j.gca.2012.07.030 | Journal (article/letter/editorial) | | in the saprolite. In the Philippines (ophiolite complex on the Pujada Peninsula), the recent EXAFS study...peaks at 9.6 and 4.7 Å, consistent with both asbolane (9.6 Å and 4.6 Å JCPDS # 00-043-1459) and lithiophorite...with an intermediate chemical composition between asbolane [(Ni,Co)1x(MnIVO2)2y (OH)22x+2ynH2O] and lithiophorite...1992). This model compound is thus referred to as asbolane–lithiophorite (Asb–Lit) in the following text...significantly to the Ni K-edge EXAFS spectrum of this asbolane–lithiophorite model compound. In addition to these |  | Dublet, Gabrielle, Juillot, Farid, Morin, Guillaume, Fritsch, Emmanuel, Fandeur, Dik, Brown, Gordon E. (2015) Goethite aging explains Ni depletion in upper units of ultramafic lateritic ores from New Caledonia. Geochimica et Cosmochimica Acta, 160. 1-15 doi:10.1016/j.gca.2015.03.015 | Journal (article/letter/editorial) | | fraction of Ni in the three profiles investigated. Asbolane/lithiophorite identified as accessory minerals...Ni/Co-bearing manganese oxides such as lithiophorite and asbolane. The Ni grade of oxide ores (below 1.5–2 wt% Ni)...incised peneplain capped by an iron pan of the Goro region in the Southern Province (Fig. 1). The corresponding...Goethite, hematite, chromite, gibbsite, talc, quartz, asbolane, lithiophorite, chlorite, and enstatite were identified... and talc (Mg3Si4O10(OH)2: Gruner, 1934). The asbolane/lithiophorite mixed phase was not included in |  | Ito, Akane, Otake, Tsubasa, Maulana, Adi, Sanematsu, Kenzo, Sufriadin, , Sato, Tsutomu (2021) Geochemical constraints on the mobilization of Ni and critical metals in laterite deposits, Sulawesi, Indonesia: A mass‐balance approach. Resource Geology, 71 (3) 255-282 doi:10.1111/rge.12266 | Journal (article/letter/editorial) | | calculation, nickel laterite, supergene enrichment, ultramafic rock 1 | INTRODUCTION Nickel laterite deposits...by intensive chemical weathering of mafic to ultramafic rocks under tropical environments, account for...chemical weathering, meteoric waters interact with ultramafic rocks, leading to the dissolution of primary...It contains four lithotectonic belts from west to east: the West Sulawesi Plutono-Volcanic Arc Belt, the...the Central Sulawesi Metamorphic Belt, the East Sulawesi Ophiolite (ESO) Belt, and continental fragments |  | Domènech, Cristina, Galí, Salvador, Villanova-de-Benavent, Cristina, Soler, Josep M., Proenza, Joaquín A. (2017) Reactive transport model of the formation of oxide-type Ni-laterite profiles (Punta Gorda, Moa Bay, Cuba) Mineralium Deposita, 52 (7) 993-1010 doi:10.1007/s00126-017-0713-0 | Journal (article/letter/editorial) | | from the chemical and mechanical weathering of ultramafic rocks exposed to the surface under favorable...(a) partially or totally 994 serpentinized ultramafic rock (protolith) characterized by unweathered...interaction of slightly acidic meteoric water with the ultramafic bedrock causes the release of Mg, Si, and Ni...(lithiophorite, Blithiophorite–asbolane intermediates^), and asbolane (RoquéRosell et al. 2010) are also...sorbs onto goethite surface forming the surface complex >Fe_ONi+. These authors used a log K for goethite |  | | Journal (article/letter/editorial) | | weathering involved the Oman Mountains region. This weathering produced complex mineral and chemical assemblages...mainly due to the chemical weathering of mafic/ultramafic rocks associated with active Cretaceous to Late...settings developed on Archean to Proterozoic ultramafic rocks, as in Australia, Brazil, Urals, Ukraine...many factors, such as the presence of an exposed ultramafic protolith and tropical to subtropical climates...wt.% in laterites developed on ophiolite mafic/ultramafic rocks (Butt and Cluzel, 2013; Elias, 2006)) and |  | | Journal (article/letter/editorial) | | formed as a result of chemical weathering of ultramafic rocks (e.g. Freyssinet et al., 2005 and Butt...world's Ni resources are found in the Caribbean region, and the Falcondo deposit is one of the largest...been studied. The Ni-laterites from the Caribbean region have been widely studied recently (Lewis et al...agreement with the dissolution of the primary ultramafic rock leading to the progressive silicification...are likely to be weathered when the ophiolite complex is exposed to the intense rainfall and temperatures |  | | 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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