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Irarsite from
Lavatrafo, Morafeno Commune, Maevatanana District, Betsiboka, Madagascar


Locality type:Complex
Classification
Species:Irarsite
Formula:(Ir,Ru,Rh,Pt)AsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Irarsite data
Locality Data:Click here to view Lavatrafo, Morafeno Commune, Maevatanana District, Betsiboka, Madagascar
Data Identifiers
Mindat Occurrence Record ID:560129
Long-form Identifier:1:3:560129:5
GUID (UUID V4):ed649bde-9fd3-4f56-847f-9424b9abb9cb
References
Reference Search (possible matching items)
Journal (article/letter/editorial)
intrusions in the Andriamena region, north-central Madagascar G.M. Bybee ⁎, L.D. Ashwal, A.H. Wilson School...online 7 March 2010 Editor: R.W. Carlson Keywords: Madagascar platinum group elements ruthenium Alaskan–Uralian...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 ultramaïŹ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...olivine. The discovery of these sperrylite (PtAs2), irarsite (IrAsS) and hollingworthite (RhAsS) inclusions...liquid–olivine–sulphide liquid into the dyke-like Lavatrafo intrusions. The high As content of the sulphide...Arsenides, Ultramafic complexes, Andriamena, Madagascar Introduction Geochemical exploration carried
Journal (article/letter/editorial)
at the Ranomena mine, Toamasina chromite district, Madagascar Giovanni Grieco ⁎, Anna Merlini, Alberto...group elements Platinum group minerals Chromitite Madagascar a b s t r a c t This paper presents new data...mine in the North Toamasina chromite district of Eastern Madagascar. Such data can provide an insight on...the differences with other chromite deposits of Madagascar. Chromitite host rocks are harzburgite and pyroxenite...Elsevier B.V. All rights reserved. 1. Introduction Madagascar has never been a platinum-group-element (PGE)
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
Journal (article/letter/editorial)
(5), Ru-Fe-Os-Ir-oxides (4), Pt-Fe alloy (1) and irarsite, ideally IrAsS, (1), and form crystals of variable...Os-Ir: Os-Ir alloy, Pt-Fe: Pt-Fe alloy, Irar: Irarsite. 13.51 2.52 47.50 0.82 0.00 0.01 0.00 0.25 0...(20), Os-Ir-Ru alloy (12), Pt-Fe alloy (2) and irarsite (2) (Fig. 4b). Their size ranges between 20 and...Pd-oxides found in the ultramaïŹc complex of Lavatrafo (Madagascar) replaced a precursor Pd-bearing PGM and...concentrates of the Antanambao-Manampotsy area, Madagascar. – Comptes-rendus de l’AcadĂ©mie des Sciences
Journal (article/letter/editorial)
(PtAsS-RhAsS), hollingworthite-irarsite (RhAsS-IrAsS) and irarsite (IrAsS; Table 5; Fig. 8). The majority...Great Dyke (Coghill and Wilson 1993), Lavatrafo AC Complex, Madagascar (McDonald 2008) and Sudbury (Dare...IPGE-rich species (e.g., erlichmanite, laurite and irarsite; Table 5). This is consistent with podiform chromitites...the Muldersdrif Ultramafic Complex, Krugersdorp District’. Trans. Geol. Soc. S. Afr. 81, 193–203 Anhaeusser...Surrounding Archaean Volcanic Rocks, Krugersdorp District’. Transactions of the Geological Society of South
Journal (article/letter/editorial)
inclusions in chromite and some of the laurite and irarsite were investigated. Analytical details are given...made for laurite, members of the hollingworthite–irarsite–platarsite solid solution series, PGE alloys,...investigated chromitites (Table 3, Fig. 6C). Palıtlı irarsite and erlichmanite. The PPGMs in Berit are Pt–Rh-bearing...sulpharsenides belonging to the platarsite/hollingworthite/irarsite solid solution series, Pt–Pd base metal alloys...052 0.152 0.075 0.174 0.035 wt.% Laurite Irarsite S Fe Ni As Ru Rh Os Ir Pt Total At. % S Fe Ni
Journal (article/letter/editorial)
(Mrk), sperrylite (Spy), hollingworthite (Hlw), irarsite (Irs), violarite (Vio), pyrite (Py), goethite...Within this group of PGM, sperrylite (PtAs2), irarsite [(Ir,Pt,Rh)AsS], and hollingworthite [(Rh,Ir,Co...lm2, hollingworthite ranges from 3 to 6 lm2, and irarsite from 6 to 110 lm2. They 763 PLATINUM-GROUP...merenskyite; Spy, sperrylite; Hlw, hollingworthite; Irs, irarsite. occur as euhedral relicts derived from the primary...still represented by voids in the host goethite. Irarsite is also affected by partial fragmentation (Fig
Journal (article/letter/editorial)
rutheniridosmine, platinum, laurite, hongshiite, irarsite, cuprorhodsite, iridsite, prassoite, hollingworthite...They are also found included in chromite and in irarsite (cf. Borg, 1997). (3) Lamellae grouped in boxworks...sulpharsenides were observed: laurite (Figs 2d, 4e), irarsite, iridsite, prassoite, erlichmannite and hollingworthite...cementing iridium and osmium lamellae, whereas irarsite is found as crusts around other PGM. Simple PGE-oxides...Country Ethiopia USA USA Colombia Madagascar N. Caledonia Madagascar N. Caledonia Ethiopia USA N. Caledonia
Journal (article/letter/editorial)
Bushveld Complex in South Africa, of the Sudbury district in Canada, and later Norilsk in Russia grand style...Bushveld Complex in South Africa, of the Sudbury district in Canada, and later Norilsk in Russia came into...Bushveld Complex in Southfrom Africa, of the Sudbury district in Canada, The 2054.4 [1–3]. ± 1.3-Ma-old [9]...hollingworthite [RhAsS], rarer platarsite [PtAsS], irarsite [IrAsS], and ruarsite [RuAsS]. Antimonides like...], 15% PGE-sulfarsenides (hollingworthite and irarsite), and 5% of other PGM. (Pt,Pd)-bismuthotellurides
Journal (article/letter/editorial)
Since the 1930s, plutons of the Monchegorsk ore district have been regarded as nickel-bearing. The first...Paleoproterozoic layered plutons of the Monchegorsk ore district were discovered in the late 1990s. As Corresponding...Keithconnite Telargpalite Sopcheite Zvyagintsevite Irarsite Hollingworthite Platarsite Hessite Pd-bearing...in Ultramafic Complexes near Lavatrafo, Western Andriamena, Madagascar,” Mineral. Mag. 63 (3), 345–352...34. Layered Intrusions of the Monchegorsk Ore District: Petrology, Ore Mineralization, Isotopes, and
Journal (article/letter/editorial)
pyrrhotite, chalcopyrite, stibiopalladinite, atokite, irarsite, michenerite, moncheite or Au–Ag–Cu alloy. An...shallow levels of an ultramafic intrusion in Madagascar (McDonald et al. 1999a). Pd–O–H phases with a...Pt–Fe nuggets from alluvial deposits in eastern Madagascar. Can. Mineral. 30, 983-1004. ________ & ________...in ultramafic complexes near Lavatrafo, western Andriamena, Madagascar. Mineral. Mag. 63, 345-352. ________
Journal (article/letter/editorial)
Os–Ir–As–S (possibly osarsite), Ir–As–S (possibly irarsite) and Ir-Pt-As phases are present (Ortega et al...also described by SalpĂ©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):1–10...in ultramafic complexes near Lavatrafo, western Andriamena, Madagascar. Mineral Mag 63(3):345–352 McDonald
Journal (article/letter/editorial)
(2008) has described PtAs2 (sperrylite), IrAsS (irarsite) and RhAsS (hollingworthite) inclusions in olivine...mafic/ultramafic intrusive complexes near Lavatrafo, Madagascar (Ohnenstetter et al. 1999). Whilst he concluded...in ultramafic complexes at Western Andriamena, Madagascar. Applied Earth Science (Trans Inst Min Metall
Book
Os–Ir–Ru alloys, and minor Pd–Te, anduoite, and irarsite in dunite and chromitite of the Xiadong Alaskan-type...(FePt)1−x S, Ir–Rh–Heazlewoodite (NiIrRh)3 S2 Irarsite IrAsS, Osarsite OsAsS, Ruarsite RuAsS, Hollingworthite...decreasing amounts of Os–Ir alloys, As-bearing phases (irarsite), and BM minerals containing detectable amounts...such as tulameenite, Cu–Pd–Pt alloys, potarite, irarsite, geversite, tolovkite, unknown Rh–Te (Table 2)... cuprorhodsite, unnamed Ir and Ni sulïŹde, and irarsite. (I) Bi-phase PGM composed of osmium and ruthenarsenide
 
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