 | | Journal (article/letter/editorial) | | PGM-bearing chromitites at the Ranomena mine, Toamasina chromite district, Madagascar Giovanni Grieco â, Anna...group elements Platinum group minerals Chromitite Madagascar a b s t r a c t This paper presents new...the Ranomena mine, the only past-producing chromite mine in the North Toamasina chromite district of Eastern...Eastern Madagascar. Such data can provide an insight on tectonic setting that led to emplacement of their...differences with other chromite deposits of Madagascar. Chromitite host rocks are harzburgite and pyroxenite |  | ISHWAR-KUMAR, C., RAJESH, V.J., WINDLEY, B.F., RAZAKAMANANA, T., ITAYA, T., BABU, E.V.S.S.K., SAJEEV, K. (2018) Chromite chemistry as an indicator of petrogenesis and tectonic setting of the Ranomena ultramafic complex in north-eastern Madagascar. Geological Magazine, 155 (1) 109-118 doi:10.1017/s0016756816000972 | Journal (article/letter/editorial) | | tectonic setting of the Ranomena ultramafic complex in north-eastern Madagascar C . I S H WA R - K U M... UniversitĂ© de Toliara, BP.185, Toliara 601, Madagascar ¶Japan Geochronology Network (NPO), 2â5 Nakahima...September 2016) Abstract â The Ranomena ultramafic complex in NE Madagascar consists of layered gabbro,...garnet websterite and chromitite-layered peridotite. This study of the Ranomena chromite chemistry aims...environment of the complex. The chromite from the Ranomena chromitite is unzoned/weakly zoned and has a Cr# (Cr/(Cr |  | Uysal, Ibrahim, Akmaz, Recep Melih, Kapsiotis, Argyrios, Demir, Yılmaz, Saka, Samet, Avcı, Erdi, MĂŒller, Dirk (2015) Genesis and geodynamic significance of chromitites from the Orhaneli and Harmancık ophiolites (Bursa, NW Turkey) as evidenced by mineralogical and compositional data. Ore Geology Reviews, 65. 26-41 doi:10.1016/j.oregeorev.2014.08.006 | Journal (article/letter/editorial) | | Platinum-group mineral Platinum-group element Chromitite Ophiolite Turkey a b s t r a c t Chromitites...Fe2+)] values vary from 0.52 to 0.69. However, one chromitite sample (BO13B) from the Orhaneli ophiolite contains...content of platinum-group elements (PGE) in most chromitite samples varies between 83 and 169 ppb, two samples...boninitic melts in an arc setting. However, BO13B chromitite sample from the Orhaneli chromitites may have...Elsevier B.V. All rights reserved. 1. Introduction Chromitite bodies are randomly distributed within the mantle |  | Ishwar-Kumar, C., Windley, B.F., Horie, K., Kato, T., Hokada, T., Itaya, T., Yagi, K., Gouzu, C., Sajeev, K. (2013) A Rodinian suture in western India: New insights on India-Madagascar correlations. Precambrian Research, 236. 227-251 doi:10.1016/j.precamres.2013.07.023 | Journal (article/letter/editorial) | | suture in western India: New insights on India-Madagascar correlations C. Ishwar-Kumar a , B.F. Windley...geochronological data from western India and eastern Madagascar suggest diachronous ocean closure during the...(Rajasthan, NW India), Seychelles and northern Madagascar and interpreted to represent the western margin...(Ashwal et al., 2013). However, the position of Madagascar and its connection with western India during...et al., 2008). The conïŹguration of India and Madagascar in Gondwana is well known compared to that in |  | | Journal (article/letter/editorial) | | surrounded by dunite envelopes of variable thickness. Chromitite seams from the Antalya mantle suite are both...in Cr-spinel indicates that the melttriggered chromitite genesis potentially involved a hydrous component...combined with the broad compositional range of the chromitite-making spinel grains (Dick and Bullen, 1984;...various models have been proposed to explain chromitite genesis, the mechanism under which they are formed...al., 2005). Additional controversy regarding chromitite derivation relates to the coexistence of high-Cr |  | JimĂ©nezâFranco, Abigail, GonzĂĄlezâJimĂ©nez, JosĂ© M., RoquĂ©, Josep, Proenza, JoaquĂn A., Gervilla, Fernando, Nieto, Fernando (2020) Nanoscale constraints on the in situ transformation of RuâOsâIr sulfides to alloys at low temperature. Ore Geology Reviews, 124. 103640pp. doi:10.1016/j.oregeorev.2020.103640 | Journal (article/letter/editorial) | | serpentine-dominant matrix of the mantle-hosted chromitite body of Monte Bueno in eastern Cuba. At the micron-scale...grain associated with the silicate matrix of the chromitite revealed a magmatic sector zoned core, which...serpentinization/ocean-floor metamorphism that affected the chromitite body. The observations provided here are relevant...the podiform chromitite ore body of Monte Bueno from the Sagua de TĂĄnamo mining district in eastern Cuba...2011). The Sagua de TĂĄnamo area is a small mining district (~3 km long), located in the easternmost part |  | | Journal (article/letter/editorial) | | margin of the East African Orogen in central Madagascarć€œ Alan S. Collins a,â , Ian C.W. Fitzsimons a...de la Terre, UniversitĂ© de Toliara, Toliara, Madagascar Received 25 July 2001; received in revised form...accepted 16 February 2002 Abstract The island of Madagascar straddles the poorly understood eastern margin...eastern margin of the Antananarivo block of central Madagascar and the overlying Beforona belt of the Tsaratanana...eastern Antananarivo block indicates that eastern Madagascar was a focus for deformation during the final |  | | Journal (article/letter/editorial) | | variation in platinum group element within altered chromitite of the Kondapalli Layered Igneous Complex (Southern...variation in platinum group element within altered chromitite of the Kondapalli Layered Igneous Complex (Southern...variation in platinum group element within altered chromitite of the Kondapalli Layered Igneous Complex (Southern...orthopyroxenite, clinopyroxenite and orthopyroxene chromitite (Nanda and Natarajan, 1980, Leelanandam, 2006)...constitute the Chromitite-Ultramafic Rock Series (Leelanandam, 1999); however, chromitite-orthopyroxenite/clinopyroxenite |  | Rakhimov, Ildar R., Saveliev, Dmitri E., Rassomakhin, Mikhail A., Samigullin, Aidar A. (2022) Chromian Spinels from Kazanian-Stage Placers in the Southern Pre-Urals, Bashkiria, Russia: Morphological and Chemical Features and Evidence for Provenance. Minerals, 12 (7) 849 doi:10.3390/min12070849 | Journal (article/letter/editorial) | | crystals with minor defects of vertexes and edges; (II) octahedral crystals with obvious defects of facets...referred to group I, 30these, grains18 (38.5%) group II, 15 grains (19.2%) to further morphological and chemical...are referred to group I, 30 grains (38.5%) to group II, 15 grains (19.2%) to eachthe morphology of chromian...Thealmost amount of chromian spinel in the I and II have theestimated size of 150â200 ”m. Crystals of...in group II, 12 out of 15 in group III and 8 out of 15 in group IV. Most of the studied II have the size |  | | Report (issue) | | Goias, Brazil Andriamena, Befandriana, and Ranomena, Madagascar Mashaba, Zimbabwe Stratiform deposits are...podiform deposits are: Kempersai, Kazakhstan Perm district, Russia; Zambalas, Philippines Four districts...Oregon where beach sands were mined during Word War II. Over the last decade, some attempts have been made...Kazakhstan Podiform 126,000 126,000 301,000 Madagascar Stratiform 2,120 2,120 2,120 Macedonia ...identified in the Cuttack district of Orissa State in India and in the Kempirsai district of Kazakhstan. The |  | | Journal (volume) | | was nicely shown for the case of oxidation of Mn(II) by bacteria [5]. Due to the rather low absorption...physics and chemistry of actinide-bearing materials; ii.) first principles, multi-scale modeling of complex...B. (2008) (eds.) Adsorption of metals by geomedia II: Variables, mechanisms, and model applications. Elsevier...outermost limefree zone (I), the transition zone (II), and the unreacted zone (III) on a periclase-based...Technische UniversitĂ€t MĂŒnchen, Garching, Germany 3 FRM II, Technische UniversitĂ€t MĂŒnchen, Garching, Germany |
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