 | | Journal (article/letter/editorial) | | intrusions in the Andriamena region, north-central Madagascar G.M. Bybee ā, L.D. Ashwal, A.H. Wilson School...online 7 March 2010 Editor: R.W. Carlson Keywords: Madagascar platinum group elements ruthenium AlaskanāUralian...paragneisses in the Andriamena region of north-central Madagascar fall within the domain of a 900-km-long belt...arc is reported to extend from north-central Madagascar through the Seychelles into India. The ultramaļ¬c...harzburgites, lherzolites and websterites of the Lavatrafo body show enrichment in the Pd-group PGEs with |  | | Journal (article/letter/editorial) | | in ultramafic complexes at western Andriamena, Madagascar I. McDonald* Small (,2 km diameter), ultramafic...intrusive complexes in the Andriamena region of Madagascar carry high concentrations of platinum-group elements...liquidāolivineāsulphide liquid into the dyke-like Lavatrafo intrusions. The high As content of the sulphide...Arsenides, Ultramafic complexes, Andriamena, Madagascar Introduction Geochemical exploration carried...uk complexes near Lavatrafo in the west Andriamena region of northern Madagascar (Fig. 1) contain high |  | McDonald, I., Ohnenstetter, D., Ohnenstetter, M., Vaughan, D. J. (1999) Palladium oxides in ultramafic complexes near Lavatrafo, Western Andriamena,
Madagascar. Mineralogical Magazine, 63 (3) 345-352 doi:10.1180/002646199548565 | Journal (article/letter/editorial) | | in ultramafic complexes near Lavatrafo, Western Andriamena, Madagascar ]L. MCDONALD 1" , D. OHNENSTETTER...intrusive complexes in the Andriamena region of Madagascar contain zones with disseminated chromite and...palladium, oxygen, hydrated oxides, Andriamena, Madagascar. Introduction GEOCHEMICALexploration carried...mafic intrusive complexes near Lavatrafo in the Andriamena region of Madagascar (Fig. 1) contain high concentrations...and drilling have shown that dunites within the Lavatrafo UM2 and UM3 ultramafic complexes defined by Salp6teur |  | Barkov, Andrei Y., Shvedov, Gennadiy I., Polonyankin, Alexander A., Martin, Robert F. (2017) New and unusual Pd-Tl-bearing mineralization in the Anomal'nyi deposit, Kondyor concentrically zoned complex, northern Khabarovskiy kray, Russia. Mineralogical Magazine, 81 (3) 679-688 doi:10.1180/minmag.2016.080.118 | Journal (article/letter/editorial) | | The ore zones are substantially enriched in phlogopite; they consist of diopside, disseminated titaniferous...micaceous pegmatite-like mineralized rocks rich in phlogopite and apatite (see Fig. 1b). (b) A schematic geological...coarse-grained to pegmatitic, anomalously rich in phlogopite, with a high content of apatite. The micaceous...sandwich-structured interlayering of ākosviteā with the phlogopite-rich orebodies and veins (Fig. 1b). Mineral...hollingworthite (Hol) and mertieite-II (Mrt). Phl is host phlogopite. (cāf ) Reflected-light microphotographs: (c) |  | | Journal (article/letter/editorial) | | silicates (typically plagioclase, clinopyroxene and phlogopite). Only the upper part of the dunite is intersected...other sulphides are often located adjacent to phlogopite (Fig. 5A and B). The BMS also exhibit micro-scale...and ļ¬ne) in pentlandite (Pn) associated with phlogopite (Phl). (C) and inset (D): As above with patches...particularly where the sulphide is in contact with phlogopite (Fig. 5AāD). These sulphides may not however...hydrothermal fluid with a high fO2 . The presence of phlogopite commonly observed in contact with these sulphides |  | | Journal (article/letter/editorial) | | assemblage is made up of minor quartz, chromite, phlogopite and base metal sulfides. In the MO1 core, chromite...described from chromites in the Andriamena region of Madagascar by Ohnenstetter et al. (1999) and McDonald et...calc-silicate footwall at Sandsloot, Potgietersrus District South Africa. Appl Earth Sci (Trans Inst Min Metall...oxides in ultramafic complexes near Lavatrafo, Western Andriamena Madagascar. Min Mag 63:345ā352 McDonald I |  | SuĆ”rez, Saioa, Prichard, Hazel M., Velasco, Francisco, Fisher, Peter C., McDonald, Iain (2010) Alteration of platinum-group minerals and dispersion of platinum-group elements during progressive weathering of the Aguablanca NiāCu deposit, SW Spain. Mineralium Deposita, 45 (4) 331-350 doi:10.1007/s00126-009-0275-x | Journal (article/letter/editorial) | | actinolite, plagioclase, quartz, talc, chlorite and phlogopite. Serpentine is restricted to ultramafic enclaves...also described by SalpĆ©teur et al. (1995) in Madagascar. All these authors concluded that Pd is more...mineralogy from ultramafic complexes at Andriamena, Madagascar. Appl Earth Sci (Trans Inst Min Metall) 117(1):1ā10...in ultramafic complexes near Lavatrafo, western Andriamena, Madagascar. Mineral Mag 63(3):345ā352 McDonald |  | Mota-E-Silva, Jonas, Prichard, Hazel M., SuĆ”rez, Saioa, Ferreira Filho, Cesar F., Fisher, Peter C. (2016) Supergene Alteration of Platinum-Group Minerals and the Formation of Pd-Cu-O and Pd-I-O Compounds In the Limoeiro Ni-Cu-(PGE) Deposit, Brazil. The Canadian Mineralogist, 54 (3) 755-778 doi:10.3749/canmin.1500049 | Journal (article/letter/editorial) | | ultramaļ¬c rock; altered olivine, antigorite (Atg), phlogopite (Phl), and Cr-spinel (Spl) occur in the lower...oxides in ultramaļ¬c complexes near Lavatrafo, Western Andriamena, Madagascar. Mineralogical Magazine 63(3)...itabirite-hosted AuāPdāPt mineralization (jacutinga), Itabira district, Minas Gerais, Brazil. Canadian Mineralogist 40(2) |  | | Book | | Japan, 462 Switzerland, 510 Tanzania 463 Madagascar (Malagasy Republic), Malawi Nepal, 482 513...more km) from Coptos passed center for these district, correspond cites a King to the are to Bostock...location of the mines Hollandās translation, of district, and it could have been Probably these mines...BERYL IN 44 in the material carved in China, Madagascar Pough, beryl is is in existence.ā morganite...London contains the finest and largest pink Madagascar faceted morganite known did hundreds of small |  | | Journal (article/letter/editorial) | | with crystallites of olivine, clinopyroxene and phlogopite and secondary Cr-spinel. The formation of Crspinel...induces orthopyroxene (opx), plagioclase (pl), phlogopite (ph) and amphibole (amph) crystallisation, forming...Neoproterozoic ultramafic rocks in the Andriamena region, Madagascar G.M. BYBEE*, L.D. ASHWAL AND A.H. WILSON School...paragneisses in the Andriamena region of northcentral Madagascar fall within the domain of a ~900-km-long belt...arc is reported to extend from north-central Madagascar through the Seychelles into India [3, 4]. The |  | | Book | | and high-Al chromitites from the Sagua de Tanamo District, Mayari-Cristal ophiolitic massif (Eastern Cuba):...platinum-group minerals from the Manampotsy area, East Madagascar. Aust. J. Earth Sci. 1992, 39, 389ā404. [CrossRef]...Siberia, 31 Octoberā2 November 2001; Elanā, Kemerovo District: Novosibirsk, Russian, 2001; pp. 126ā132. (In...Komsomolsky mine in the Talnakh deposit of the Norilāsk district, Russia. The sample was found at coordinates:...Kerr-Addison mine, ON, Canada [15]; in the Itabira district, Minas Gerais, Brazil [16]; the Bleida Far West |
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