 | | Journal (article/letter/editorial) | | 2001 The Acoje Block Platiniferous Dunite Horizon, Zambales Ophiolite Complex, Philippines: Melt Type...Controls Graciano P. YUMUL, Jr. Abstract: The Zambales Ophiolite Complex, a supra-subduction zone ophiolite...arc-related Acoje block. This crust-mantle sequence hosts platinum-group elements (PGE) in the Acoje block...the distribution and deposition of the PGE in the Acoje block are affected by olivine, chromite and sulfide...main platiniferous zone is confined within the Acoje block transition zone dunite. (Ni and Cu) metals |  | | Journal (article/letter/editorial) | | Spfinger-Verlag1989 Zambales ophiolite, Philippines II. Sulfide petrology of the critical zone of the Acoje Massif...USA Abstract. The Acoje massif is part of a mafic-ultramafic complex, the Zambales ophiolite, and is...associated phases in the critical zone of the Acoje massif. The Acoje critical zone (ACZ) forms the basal cumulate...occurred during retrograde serpentinization of the Acoje massif. Two end-member models that could explain...zone of the Acoje massif, Zambales ophiolite, Philippines (Abrajano et al. 1989). The Acoje critical zone |  | | Journal (article/letter/editorial) | | (PGM) Turkey a b s t r a c t The Antalya–Isparta region in southwestern Turkey is well known for its large...is vastly dominated by tiny (≥10 μm) euhedral laurite crystals, followed by subsidiary irarsite and trivial...crystallization resulting from PGE-poor melt. Laurite is Os-poor and exhibits a narrow range of Os-for-Ru...Os) = 0.75–0.99]. However, the concomitance of laurite and millerite in the Cr-rich chromitites of the...ophiolitic chromitites encompasses members of the laurite-erlichmanite series and Os–Ir alloys (Kapsiotis |  | Zhou, Mei-Fu, Robinson, Paul T., Su, Ben-Xun, Gao, Jian-Feng, Li, Jian-Wei, Yang, Jing-Sui, Malpas, John (2014) Compositions of chromite, associated minerals, and parental magmas of podiform chromite deposits: The role of slab contamination of asthenospheric melts in suprasubduction zone environments. Gondwana Research, 26 (1) 262-283 doi:10.1016/j.gr.2013.12.011 | Journal (article/letter/editorial) | | 2012), the MA Acoje and Coto massifs of the Zambales ophiolite in the Philippines (Yumul et al., 2003)...chromitites T Chromite from chromitites of the Acoje and Moa-Baracoa massifs and the Luobusa RI P ophiolite...chromites. High-Cr chromites of chromitites from the Acoje massif have narrower ranges of Ni (615-1696 ppm)... 4). Both chromites have similar ranges of Ga (Acoje: 21-31 ppm; Moa-Baracoa massif: 19-29 ppm). Chromites...(450-690 ppm) and Ga (11-24 ppm) than those in the Acoje and Moa-Baracoa massifs. ACCEPTED MANUSCRIPT High-Al |  | González-Jiménez, José María, Griffin, William L., Proenza, Joaquín A., Gervilla, Fernando, O'Reilly, Suzanne Y., Akbulut, Mehmet, Pearson, Norman J., Arai, Shoji (2014) Chromitites in ophiolites: How, where, when, why? Part II. The crystallization of chromitites. Lithos, 189. 140-158 doi:10.1016/j.lithos.2013.09.008 | Journal (article/letter/editorial) | | Bulgarian Rhodopes (González-Jiménez et al. 2013b), and Santa Elena in Costa Rica (Zaccarini et al., 2011). Type...(Pedersen et PT al., 1993); Acoje block of the Zambales Ophiolites in the Philippines (Bacuta et al., 1990);...1994, 1997); Masinloc in the Coto ophiolites, Philippines (600 × 300 × 80 m; Dickey, 1975); and Mercedita...of high-Al chromite like those from Camagüey in central Cuba (Henares et al., 2010), the Australian Coolac...high-Al chromitites such as those of Coto in the Philippines (Leblanc and Violette, 1993) or North Arm Mountain |  | Angeli, N., Fleet, M. E., Thibault, Y., Candia, M. A. F. (2001) Metamorphism and PGE-Au content of chromitite from the Ipanema mafic/ultramafic Complex, Minas Gerais, Brazil. Mineralogy and Petrology, 71 (3) 173-194 doi:10.1007/s007100170038 | Journal (article/letter/editorial) | | version accepted October 12, 2000 Summary The Santa Cruz massif, which forms part of the Ipanema ma®c/ultrama®c...Ipanema Komplex, Minas Gerais, Brasilien Das Santa Cruz Massiv, das Teil des ma®schen/ultrama®schen Ipanema...Gerais State, Brazil (inset), and showing the Santa Cruz massif: BH Belo Horizonte, SP SaÄo Paulo, RDJ...chromitite layer in the largest of these massifs, i.e. Santa Cruz. The Ipanema Complex is one of several ma®c/ultrama®c...de Fora Complex of the Mantiqueira Structural Province (Angeli and Choudhuri, 1985). The Juiz de Fora |  | Zaccarini, Federica, Economou-Eliopoulos, Maria, Kiseleva, Olga, Garuti, Giorgio, Tsikouras, Basilios, Pushkarev, Evgenii, Idrus, Arifudin (2022) Platinum Group Elements (PGE) Geochemistry and Mineralogy of Low Economic Potential (Rh-Pt-Pd)-Rich Chromitites from Ophiolite Complexes. Minerals, 12 (12) 1565 doi:10.3390/min12121565 | Journal (article/letter/editorial) | | Therefore, PGE and in particular platinum and palladium mine production have grown continuously since the second...IPGE-minerals (IPGM), such as sulfides of the laurite-erlichmanite series, alloys in the Os-Ir-Ru system...PPGM (Table 1 and references therein). West and Central Europe [10,11,18,22,23,31–48], from Cyprus [9]...of Russia [51–57], and from The Philippines, North, West and Central Europe [10,11,18,22,23,31–48], from...ophiolites of Thetford Mine (Canada), Trodoos (Cyprus), Zambales (The Philippines) and Al‘Ays (Saudi Arabia) |  | Gervilla, F., Proenza, J.A., Frei, R., González-Jiménez, J.M., Garrido, C.J., Melgarejo, J.C., Meibom, A., Díaz-Martínez, R., Lavaut, W. (2005) Distribution of platinum-group elements and Os isotopes in chromite ores from Mayarí-Baracoa Ophiolitic Belt (eastern Cuba) Contributions to Mineralogy and Petrology, 150 (6) 589-607 doi:10.1007/s00410-005-0039-2 | Journal (article/letter/editorial) | | of PGEs, which is dominated by members of the laurite– erlichmanite solid solution series (RuS2–OsS2)...exception of a few deposits, such as the Acoje block in the Philippines (Bacuta et al. 1990), the Vourinos...distribution. Os–Ir alloys and members of the laurite–erlichmanite (RuS2– OsS2) solid solution series...easternmost part of the massif (Sagua de Tánamo region), the peridotite slab becomes very thin (<1 km)...massif and has the largest chromite deposits of the region (Table 1). Some of these deposits are still being |  | Prichard, Hazel M., Suárez, Saioa, Fisher, Peter C., Knight, Robert D., Watson, John S. (2018) Placer platinum-group minerals in the Shetland ophiolite complex derived from anomalously enriched podiform chromitites. Mineralogical Magazine, 82 (3) 491-514 doi:10.1180/minmag.2017.081.099 | Journal (article/letter/editorial) | | minor Pd-sulfides, Pt-Pd-Cu and Pt-Fe alloys, and laurite. Gold also occurs with the PGM. Alluvial PGM have...absent. At Harold's Grave only 3 alluvial PGM (laurite, Ir, Os) and Au were recovered reflecting the limited...characterized by Ru–Os–Ir-dominant PGM (IPGM), mainly laurite–erlichmanite (RuS2–OsS2), irarsite (IrAsS), and...Saudi Arabia (Prichard et al., 2008b), Acoje in the Philippines (Bacuta et al., 1988; Orberger et al....Os-Ir-bearing laurite included within 4 the chromite grains and Os-Ir-barren laurite of irregular shape |  | | Journal (article/letter/editorial) | | characterized by euhedral Os, Ir, and Ru (IPGE) alloys and laurite, both commonly enclosed in chromite, as well as...1996b; Ohnenstetter et al., 1999). Typically, laurite (Ru[Ir, Os]S2) and more rarely erlichmanite (OsS2)...have not been mobilized (Prichard et al., 1994). Laurite is common within chromite, but where exposed to...composition cropping out around the edges (Fig. 1). The central area of peridotite represents residual mantle with...native osmium and ruthenium, Os- and Ir-bearing laurite [Ru(Os,Ir)]S2, irarsite (IrAsS), and Ir-Ni-Fe alloys |  | Stribrny, B., Wellmer, F. -W., Burgath, K. -P., Oberthür, T., Tarkian, M., Pfeiffer, T. (2000) Unconventional PGE occurrences and PGE mineralization in the Great Dyke: metallogenic and economic aspects. Mineralium Deposita, 35 (2) 260-280 doi:10.1007/s001260050019 | Journal (article/letter/editorial) | | redistributions should be kept in mind during planning and mine operation. Investigations of unconventional PGE...for example from Mamut, Malaysia, Santo Tomas, Philippines, Editorial handling: F. M. Meyer B. Stribrny...Page 1986), mine production of PGE has only commenced recently at the Hartley Platinum mine (Broken Hill...maintenance) some 70 km south-west of Harare, and at Mimosa mine (ZIMASCO) near Zvishavane. Further exploration projects...ores Investigated samples of the MSZ from Hartley mine (OberthuÈr et al. 263 1997a, b) contain about |  | Zaccarini, F., Pushkarev, E. V., Fershtater, G. B., Garuti, G. (2004) COMPOSITION AND MINERALOGY OF PGE-RICH CHROMITITES IN THE NURALI LHERZOLITE GABBRO COMPLEX, SOUTHERN URALS, RUSSIA. The Canadian Mineralogist, 42 (2) 545-562 doi:10.2113/gscanmin.42.2.545 | Journal (article/letter/editorial) | | change from laurite–erlichmanite-dominated to enriched in Pt–Pd sulfides and alloys. Laurite is the first...dominance de laurite–erlichmanite à une dominance de sulfures de Pt–Pd et d’alliages. La laurite a cristallisé...the precipitation of chromite: sulfides of the laurite–erlichmanite series, accompanied by minor Os–Ir–Ru...CHR–I, and Pt–Fe alloy and PGE sulfides such as laurite, erlichmanite and cooperite in CHR–II. 2) Secondary...CHR–I chromitite of Nurali. A) Primary grain of laurite (L) with erlichmanite (E) rim included in fresh |  | | Journal (article/letter/editorial) | | low. IPGE rich chromites contain abundant small laurite inclusions whilst Rh and Pt are located in sulfarsenides...melts that are able to migrate out of their source region. The precipitation of chromitites is thought to...the remaining PGE. These include the Acoje block of the Zambales Ophiolite in the Philipines (Bacuta et...complexes are often incomplete, in particular in the central and southern portion of the ophiolithe. However...parts of the ophiolite are thus exposed in its central and southern parts, whereas shallower levels occur |  | | Journal (article/letter/editorial) | | Sea) and cumulate chromitites from Zambales ophiolite (Philippines) range in ‘*‘OS/‘~~OS from 1.083 to...of tectonic settings and possible mantle source region characteristics. The sample localities are shown...Indian Ridge; Z = Zabargad Island, Red Sea; ZO = Zambales Ophielite; R = Reunion. Wt.96 oxide 10 lli76...(Table 3). Zambales ophiolite, Philippines The Acoje block of the Eocene (37-58 Ma) Zambales ophiolite...‘43Nd/‘44Ndthan the Kilauea lavas. U’estern and Central Volcanic Zones, Iceland Iceland is located on |  | Jiménez–Franco, Abigail, González–Jiménez, José M., Roqué, Josep, Proenza, Joaquín A., Gervilla, Fernando, Nieto, Fernando (2020) Nanoscale constraints on the in situ transformation of Ru–Os–Ir sulfides to alloys at low temperature. Ore Geology Reviews, 124. 103640pp. doi:10.1016/j.oregeorev.2020.103640 | Journal (article/letter/editorial) | | ARTICLE INFO ABSTRACT Keywords: Nanoparticles Laurite-erlichmanite Pentlandite Irarsite Os-Ir-Ru alloys...platinum-group minerals (PGM) corresponding to the laurite (RuS2)-erlichmanite (OsS2) solid solution series...surrounded by alternating bands of Os-rich/Os-poor laurite, revealed by conventional field emission scanning...PGM grains characterized by the coalescence of laurite/erlichmanite nuclei that originally formed independently...nm in size and had potential implications for laurite nucleation. On the other hand, backscattered FESEM |  | Palomares, R. M., Hernandez, R. L., Menor, L. O., Garcia, R. P., Perez, S. M., Linares, F. G. (2013) HYDROTHERMAL PALLADIUM ENRICHMENT IN PODIFORM CHROMITITES OF CALZADILLA DE LOS BARROS (SW IBERIAN PENINSULA) The Canadian Mineralogist, 51 (3) 387-404 doi:10.3749/canmin.51.3.387 | Journal (article/letter/editorial) | | interpreted as a polyorogenic terrane accreted to the Central Iberian zone of the Iberian Massif during the Cadomian...WNW–ESE-trending Variscan structure occupying a central position in the Ossa-Morena zone (Fig. 1b). The...Iberian Massif (SPZ = South-Portuguese zone; CIZ = Central Iberian Zone). (b) Location of the Calzadilla de...and minute IPGE sulfide mineral members of the laurite-erlichmanite series (Fig. 2a). The matrix of CUCO...presence of IPGE sulfide mineral members of the laurite-erlichmanite series in some chromitites (Fig. 2a) |  | Prichard, H.M., Barnes, Stephen J., Dale, C.W., Godel, B., Fisher, P.C., Nowell, G.M. (2017) Paragenesis of multiple platinum-group mineral populations in Shetland ophiolite chromitite: 3D X-ray tomography and in situ Os isotopes. Geochimica et Cosmochimica Acta, 216. 314-334 doi:10.1016/j.gca.2017.03.035 | Journal (article/letter/editorial) | | PGM, PGE, Chromite, X-ray computed tomography, laurite, Shetland ophiolite. Abstract Chromitite from the...in New Caledonia (Augé et al., 1998), Acoje in the Philippines (Bacuta et al., 1988; Orberger et al....well as Os-, Ir- and Ru-rich PGM (IPGM) including laurite (RuS2), irarsite (Ir,Ru, Rh,Os)AsS, hollingworthite...at Nikkavord North which contains clusters of laurite, irarsite, hollingworthite, ruthenian pentlandite...Grave have revealed an assemblage dominated by laurite, ruthenian pentlandite (defined as pentlandite |  | | Journal (article/letter/editorial) | | mainly of IPGE alloys and sulfarsenides rather than laurite. At Korydallos, the assemblage is dominated by...alliages et des sulfarséniures des IPGE plutôt que la laurite. A Korydallos, l’assemblage contient surtout des...alloy, Pd–Pt–Cu oxide and hydroxide, one grain of laurite, and Ni–Fe alloy containing 1–2% Pd in solid solution...irarsite – platarsite solid-solution series and laurite, and several grains that are too small for quantitative...Scale bar represents 10 mm. R. Zoned grain of laurite enclosed in chromite (anal. 41, Table 3). Scale |  | Kozlu, Hatice, Prichard, Hazel, Melcher, Frank, Fisher, Peter, Brough, Christopher, Stueben, Doris (2014) Platinum group element (PGE) mineralisation and chromite geochemistry in the Berit ophiolite (Elbistan/Kahramanmaraş), SE Turkey. Ore Geology Reviews, 60. 97-111 doi:10.1016/j.oregeorev.2013.12.011 | Journal (article/letter/editorial) | | that IPGE-enriched phases of the PGMs such as laurite are present in both the PPGE-enriched and the PPGE-poor...Scotland (Prichard et al., 1986), Acoje in Zambales in the Philippines (Bacuta et al., 1990), 98 H....spherical BMS inclusions in chromite and some of the laurite and irarsite were investigated. Analytical details...Consultants (UK). Quantitative analyses were made for laurite, members of the hollingworthite–irarsite–platarsite...Fig. 7A–L). 70 individual PGMs (among them 30 laurite grains), commonly forming composite grains or clusters |  | | Journal (article/letter/editorial) | | platinum-group minerals identified were as follows: laurite (IrOsRu)S2, osmian iridium (Oslr), hollingworthite...palladian gold (CuPdAu), a Pd-Sb-Hg and HgTe phases. Laurite and osmian iridium occur preferentially in chromite...chromite. Os-Ir commonly forms composite PGM with laurite. Hollingworthite and tellurian arsenopalladinite...magmatic, but much of the PGE mineralogy except for laurite and osmian iridium in the center of chromite grains...are composed mainly of serpentine. Inclusions of laurite are frequently seen within chromite. Chemistry |  | | Journal (article/letter/editorial) | | geochemical data, Ru, Os, and Ir bearing PGE sulfide (laurite-erlichmanite solid solution series [(Ru,Os)S2‒(Os...paragenesis. In addition to the most common PGM laurite, several osmium (Os,Ir), iridium (Ir,Os), irarsite...Saka et al. (2014) stated that the Kızılyüksek region of the Pozantı-Karsantı ophiolite is comprised...crystals of chromitites from the TE Kızılyüksek region. In addition, we determined whole-rock PGE contents...Table 1 shows the results. For the analysis of the central part of the Cr-spinel crystals, Cr2O3 content varies |  | | Journal (article/letter/editorial) | | following order of abundance: (1) sulfides [Os-rich laurite, erlichmanite and unnamed (Ir,Rh)(Ni,Cu,Fe)2S3]...common abundance of PGE sulfides, i.e., Os-rich laurite, in the Oman chromitites is ascribed to the su...fugacity was sufficiently high to produce the Os-rich laurite and, to a lesser extent, erlichmanite and Ru-poor...an early stage of serpentinization. Keywords: laurite, chromitite, ophiolite, platinum-group elements...dans un ordre selon leur abondance: (1) sulfures [laurite osmifère, erlichmanite et (Ir,Rh)(Ni,Cu,Fe)2S3 |  | | Journal (article/letter/editorial) | | sheets, elongated NW-SE, and restricted in their central and northern parts. They crop out (a) in two discontinuous...Yugoslavia, can be distinguished into the western and central ophiolites, both of which are characterized by...from Skyros island, Euboea, the Kissavos area (central Vourinos), Pindos complex, Serbomacedonian and...chromite deposits in Greece, with exception the central part of the former, are characterized by low PGE...major element composition, e.g. Skyros island, Central Greece (Agiorgitis and Wolf, 1978; Economou, 1984; |  | | Journal (article/letter/editorial) | | This article was downloaded by: [Central Michigan University] On: 15 October 2014, At: 06:49 Publisher:...58140, Turkey AND PAUL J. LECHLER Downloaded by [Central Michigan University] at 06:49 15 October 2014 ... with closure initiated 241 Downloaded by [Central Michigan University] at 06:49 15 October 2014 ...zone; DSFZ = Dead Sea fault zone. Downloaded by [Central Michigan University] at 06:49 15 October 2014 ...TURKISH CHROMITE DEPOSITS 243 Downloaded by [Central Michigan University] at 06:49 15 October 2014 |  | | Journal (article/letter/editorial) | | mantle section of the Neyriz ophiolite. PGM, mainly laurite–erlichmanite, mostly occur as small (b 1 to 30...1991), and in the cumulate sequence (e.g. Acoje, Philippines; Orberger et al., 1988). Small sizes, low...to many ophiolitic chromitites, minerals of the laurite–erlichmanite series (RuS2–OsS2) dominate. Rare...Sanandaj–Sirjan Zone. The inner or northern sub-belt (Central Iran type), represented by extensive Coloured Mélange...Mélange zones, is located around the Central Iranian micro-continent and includes the Sabzevar, Nain-Baft |
|
