 | GonzĂĄlez-JimĂ©nez, JosĂ© MarĂa, Locmelis, Marek, Belousova, Elena, Griffin, William L., Gervilla, Fernando, Kerestedjian, Thomas N., O'Reilly, Suzanne Y., Pearson, Norman J., Sergeeva, Ivanina (2015) Genesis and tectonic implications of podiform chromitites in the metamorphosed ultramafic massif of Dobromirtsi (Bulgaria) Gondwana Research, 27 (2) 555-574 doi:10.1016/j.gr.2013.09.020 | Journal (article/letter/editorial) | | in the metamorphosed ultramaïŹc massif of Dobromirtsi (Bulgaria) JosĂ© MarĂa GonzĂĄlez-JimĂ©nez a,â, Marek...of Sciences, 24 Georgi Bonchev Str., 1113 SoïŹa, Bulgaria b a r t i c l e i n f o Article history: Received...chromitites occur in the meta-dunite horizon of the Dobromirtsi ultramaïŹc massif, in the Central Rhodope metamorphic...metamorphic core complex (southern Bulgaria). Although these were deformed and metamorphosed together with...Magmatic platinum-group minerals (PGM), including laurite (RuS2), OsâIr alloys and sulfarsenides (irarsite |  | | Journal (article/letter/editorial) | | Ophiolite Chromitites from the Dobromirtsi Massif, Rhodope Mountains (Bulgaria) JosĂ© MarĂa GonzĂĄlez-JimĂ©nez...Institute, Bulgarian Academy of Sciences, SoïŹa, Bulgaria and 3Departament de Cristal·lograïŹa, Mineralogia...Abstract The Dobromirtsi UltramaïŹc Massif, located in the Rhodope Mountains (SE Bulgaria), is a portion...other ophiolite chromitites, those found in Dobromirtsi carry abundant platinum-group minerals (PGM)...consist mainly of Ru-, Os-, and Ir-based PGM (laurite RuS2-erlichmanite OsS2, Os-Ru-Ir alloys, irarsite |  | GonzĂĄlez-JimĂ©nez, JosĂ©M., Gervilla, Fernando, Proenza, JoaquĂn A., Kerestedjian, Thomas, AugĂ©, Thierry, Bailly, Laurent (2009) Zoning of laurite (RuS2)erlichmanite (OsS2): implications for the origin of PGM in ophiolite chromitites. European Journal of Mineralogy, 21 (2) 419-432 doi:10.1127/0935-1221/2009/0021-1921 | Journal (article/letter/editorial) | | 419â432 Published online March 2009 Zoning of laurite (RuS2)âerlichmanite (OsS2): implications for the...Sciences, 24 Georgi Bonchev Str., 1113 Sofia, Bulgaria 4 BRGM (Bureau de recherches geÌologiques et minieÌres)...Cuba) and in the Dobromirtsi metamorphosed ultramafic (ophiolitic) massif (SE Bulgaria) with regard to...of the laurite (RuS2)âerlichmanite (OsS2) solid solution series. We found several zoned lauriteâerlichmanite...have been distinguished: (i) grains with Os-poor (laurite) core and Os-rich rim (normal zoning), (ii) grains |  | GonzĂĄlez-JimĂ©nez, JosĂ© MarĂa, Gervilla, Fernando, Proenza, JoaquĂn A., AugĂ©, Thierry, Kerestedjian, Thomas (2009) Distribution of platinum-group minerals in ophiolitic chromitites. Applied Earth Science, 118 (3) 101-110 doi:10.1179/174327509x12550990457924 | Journal (article/letter/editorial) | | Sciences, 24 Georgi Bonchev Str., 1113 Sofia, Bulgaria 2 *Corresponding author, email jmgonzj@ugr.es...Tehuitzingo, Mexico; Ray-Iz, Rusia; and Dobromirtsi, Bulgaria), Mesozoic ophiolitic complexes (chromitites...Scotland Austria Austria Russia Australia Canada Bulgaria Cyprus Greece Greece Greece Oman Turkey Cuba...Min. Metall. B) Thetford Mines(*) 2009 VOL Dobromirtsi(*) Troodos(*) Othrys(*) Vourinos(**) Pindos(**)...from chromitites of the Dobromirtsi UltramaïŹc Massif (southeastern Bulgaria). C and D from chromitites |  | | Journal (article/letter/editorial) | | the chromite deposits of the Dobromirtsi Massif (southern PT Bulgaria). The final example was chosen...abundant inclusions of micrometer-sized PGMs (laurite (RuS2), irarsite (IrAsS), AC cuproiridsite (CuIr2S4))...abundant crystals of Os-Ir-Ru minerals (i.e., laurite-erlichmanite and irarsite) are hosted in chromite...nanoparticles in laurite from chromite deposits of the CE Dobromirtsi Ultramafic Massif (southern Bulgaria): primary...Tertiary Rhodope Metamorphic Core Complex in southern Bulgaria and northern Greece contains numerous slivers |  | GonzĂĄlez-JimĂ©nez, JosĂ© MarĂa, Griffin, William L., Gervilla, Fernando, Proenza, JoaquĂn A., O'Reilly, Suzanne Y., Pearson, Norman J. (2014) Chromitites in ophiolites: How, where, when, why? Part I. A review and new ideas on the origin and significance of platinum-group minerals. Lithos, 189. 127-139 doi:10.1016/j.lithos.2013.06.016 | Journal (article/letter/editorial) | | and 9 are from chromitites of the Dobromirtsi UltramaïŹc Massif, Bulgaria; 3â5 and 8 are from the chromitites...due to the presence of abundant disulïŹdes of the laurite (RuS2)-erlichmanite (OsS2) solid solution series...sperrylite (PtAs2) and PtâPdâRh alloys (Fig. 2). Lauriteâerlichmanite (18%), OsâIrâRu alloys (13%) and irarsite...oxides often occur as rims around larger grains of lauriteâerlichmanite or irarsite, which may also show inner...in Argentina (Proenza et al., 2008) or Dobromirtsi in Bulgaria (GonzĂĄlez-JimĂ©nez et al., 2010). The higher |  | GonzĂĄlez-JimĂ©nez, JosĂ© M., Proenza, JoaquĂn A., Martini, Michelangelo, CamprubĂ, Antoni, Griffin, William L., O'Reilly, Suzanne Y., Pearson, Norman J. (2017) Deposits associated with ultramaficâmafic complexes in Mexico: the Loma Baya case. Ore Geology Reviews, 81. 1053-1065 doi:10.1016/j.oregeorev.2015.05.014 | Journal (article/letter/editorial) | | the Golyamo Kamenyane serpentinite, in southern Bulgaria. The porous rim shows higher reïŹectivity under...grains of platinum-group minerals (PGM), such as laurite and RuâOsâIr alloys, which can be found as inclusions...structural formula. All the other analyzed grains of laurite are very inhomogeneous in composition due to the...possible effects of alteration, the composition of laurite from the Loma Baya chromite deposit as a whole...et al., 2004, and references therein). Magmatic laurite with similar Os-poor composition (Fig. 8) has been |  | GonzĂĄlez-JimĂ©nez, JosĂ© M., Reich, Martin, CamprubĂ, Antoni, Gervilla, Fernando, Griffin, William L., ColĂĄs, Vanessa, OâReilly, Suzanne Y., Proenza, JoaquĂn A., Pearson, Norman J., Centeno-GarcĂa, Elena (2015) Thermal metamorphism of mantle chromites and the stability of noble-metal nanoparticles. Contributions to Mineralogy and Petrology, 170 (2) doi:10.1007/s00410-015-1169-9 | Journal (article/letter/editorial) | | metamorphism have caused the desulphurization of laurite RuS2, releasing minute particles of RuâOsâIr alloys...chromitites from the oceanic mantle, grains of lauriteâerlichmanite (RuS2âOsS2) solid solutions are the...to those of the coexisting (precursor) magmatic laurite, suggesting that they represent metallic âresiduesâ...fronts, edges or margins of the larger precursor laurite grains (Zaccarini et al. 2005; Ghorfi et al. 2008;...would be precursors of larger PGM sulphides (e.g. laurite) by reaction with S upon local increases of fS2 |  | | Journal (article/letter/editorial) | | clinopyroxenite-dunite complexes located within the Aldan Province, in the southeastern part of the Siberian Craton...2002; Jo ur Malitch, 2004) and seven grains of laurite and Os-Ir alloys from chromitites of the Nizhny...alloys, with subordinate amounts of Os-Ir alloys, laurite (RuS2), erlichmanite (OsS2), hollingworthite (RhAsS)...amounts of Os-Ir alloys (Os, (Os,Ir) and (Ir,Os)), laurite (RuS2), erlichmanite (OsS2), hollingworthite (RhAsS)...Pt-Fe alloy grains intergrown with Os-Ir alloys, laurite and irarsite are illustrated in Fig. 3. Os-Ir alloys |  | Grieco, Giovanni, Bussolesi, Micol, Eslami, Alireza, Gentile, Andrea, Cavallo, Alessandro, Lian, Dongyang, Yang, Jingsui, Ghaseminejad, Farhad (2020) Differential platinum group elements (PGE) re-mobilization at low fS2 in Abdasht and Soghan mafic-ultramafic complexes (Southern Iran). Lithos, 366. 105523pp. doi:10.1016/j.lithos.2020.105523 | Journal (article/letter/editorial) | | matrix are poorly preserved, while primary PGM (laurite) are more abundant. Secondary BMM (heazlewoodite...the stability of laurite up to 1275 °C at log(fS2 ) of -2. At higher temperatures laurite is replaced by...-2 and -1.3, and T<1260 °C the coexistence of laurite with Ru-Os-Ir alloys was observed (Brenan and Andrews...Setting The Haji Abad-Esfandagheh district of Kerman province, Southern Iran, is located in a very tectonically...analyzed due to Pr their small size. Ru-rich laurite-erlichmanite solid solution is the most abundant |  | | Journal (article/letter/editorial) | | is vastly dominated by tiny (â„10 ÎŒm) 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) = 0.75â0.99]. However, the concomitance of laurite and millerite in the Cr-rich chromitites of the...ophiolitic chromitites encompasses members of the laurite-erlichmanite series and OsâIr alloys (Kapsiotis...morphological relations. Cr-sp: chromian spinel, Lrt: laurite, Amp: amphibole, Mlr: millerite, Ol: olivine, and |  | GonzĂĄlez-JimĂ©nez, JosĂ© MarĂa, Barra, Fernando, Walker, Richard J., Reich, Martin, Gervilla, Fernando (2014) Geodynamic implications of ophiolitic chromitites in the La Cabaña ultramafic bodies, Central Chile. International Geology Review, 56 (12) 1466-1483 doi:10.1080/00206814.2014.947334 | Journal (article/letter/editorial) | | mantle of supra-subduction zone (SSZ) ophiolites. Laurite (RuS2)-erlichmanite (OsS2) phases are the most...small inclusions (<25 ”m) of Os-Ir-Ru alloys, laurite (RuS2)-erlichmanite (OsS2), irarsite (IrAsS), and...(RhAsS) and an unidentiïŹed antimonide (Rh-Cu-Sb). Laurite-erlichmanite is found as inclusions in the cores...Eastern Desert, Egypt (Ahmed et al. 2006); Dobromirtsi, Bulgaria (GonzĂĄlez-JimĂ©nez et al. 2013b); Kraubath...6a). The inclusions of primary Os-rich PGM like laurite, as a mineralogical expression of the abundances |  | GonzĂĄlez-JimĂ©nez, J.M., Proenza, J.A., Gervilla, F., Melgarejo, J.C., Blanco-Moreno, J.A., Ruiz-SĂĄnchez, R., Griffin, W.L. (2011) High-Cr and high-Al chromitites from the Sagua de TĂĄnamo district, MayarĂ-Cristal ophiolitic massif (eastern Cuba): Constraints on their origin from mineralogy and geochemistry of chromian spinel and platinum-group elements. Lithos, 125 (1) 101-121 doi:10.1016/j.lithos.2011.01.016 | Journal (article/letter/editorial) | | each large PGM to check for homogeneity. Since laurite contain some amounts of Pt, Rh, Ni and Fe (Cabri...from chromitites of the Sagua de TĂĄnamo district. Laurite: 1â5, irarsiteâhollingworthite: 6â10, iridium:...About 60% of identiïŹed PGM are members of the laurite (RuS2)erlichmanite (OsS2) solid solution series...mineral close to RhNiAs (1%). Minerals of the lauriteâerlichmanite series occur as single grains or associated...ranges between Os-rich laurite [(Ru0.56Os0.29Ir0.11Ni0.03Cu0.02)1 S2] and Os-poor laurite [(Ru0.91Os0.06 Ir0 |  | Malitch, K. N., Anikina, E. V., Badanina, I. Yu., Belousova, E. A., Pushkarev, E. V., Khiller, V. V. (2016) Chemical composition and osmium-isotope systematics of primary and secondary PGM assemblages from high-Mg chromitite of the Nurali lherzolite massif, the South Urals, Russia. Geology of Ore Deposits, 58 (1) 1-19 doi:10.1134/s1075701515050037 | Journal (article/letter/editorial) | | the location of primary RuâOssulfides of the lauriteâerlichmanite solid solution series. Similar variations...malized PGE concentrations. The RuâOs sulfides of lauriteâerlichmanite series are predominant PGM. The chromitites...accompanied by native osmium crystals (Fig. 6f). Laurite contains 0.3â2.0 wt % Fe and 0.37â0.68 wt % Ni...highest contents of both components are detected in laurite associated with pentlandite. GEOLOGY OF ORE DEPOSITS...the contact between Rubearing pent landite and laurite (Figs. 6g, 6h; Table 3). The Ni/Fe ratio in this |  | Prichard, Hazel M., Barnes, Sarah-Jane, Fisher, Peter C., PagĂ©, Philippi, Zientek, Michael L. (2017) Laurite and Associated PGM In the Stillwater Chromitites: Implications For Processes of Formation, and Comparisons With Laurite In the Bushveld and Ophiolitic Chromitites. The Canadian Mineralogist, 55 (1) 121-144 doi:10.3749/canmin.1600006 | Journal (article/letter/editorial) | | pp. 121-144 (2017) DOI: 10.3749/canmin.1600006 LAURITE AND ASSOCIATED PGM IN THE STILLWATER CHROMITITES:...FOR PROCESSES OF FORMATION, AND COMPARISONS WITH LAURITE IN THE BUSHVELD AND OPHIOLITIC CHROMITITES HAZEL...The most common PGM observed is laurite [Ru(Os,Ir)S2], but how the laurite formed is not clearly understood...chromitites is laurite, predominantly enclosed in chromite grains. In a few cases the laurite is accompanied...Pt-Pd tellurides, sperrylite, platarsite, minor laurite, and one grain of Pd-Ge. The PGM grains enclosed |  | Derbyshire, E.J., O'Driscoll, B., Lenaz, D., Gertisser, R., Kronz, A. (2013) Compositionally heterogeneous podiform chromitite in the Shetland Ophiolite Complex (Scotland): Implications for chromitite petrogenesis and late-stage alteration in the upper mantle portion of a supra-subduction zone ophiolite. Lithos, 162. 279-300 doi:10.1016/j.lithos.2012.11.013 | Journal (article/letter/editorial) | | minerals previously documented from the SOC include laurite [(Ru,Os)S2], PGM of the irarsite-hollingworthite...[PtAs2] (Prichard and Tarkian, 1988). At Cliff, laurite is the only Ru-bearing PGM observed in the fresh...fresh Cr-spinel crystal cores, whilst Os-poor laurite is concentrated in sieve-textured alteration rims...respectively. Five grains of irarsite and one grain of laurite were also analysed from Cliff chromitite seams...Cliff and Harold's Grave noted the presence of laurite in fresh Cr-spinel crystal cores (Prichard and |  | | Journal (article/letter/editorial) | | as oxides/hydroxides, and to lesser amounts of laurite, with pure Ru instead activating the stable CO2...types are found across the entire island [1]. Laurite occurs as (a) single inclusions in chromite, with...with variable Ir and Os contents [22], and (b) Laurite occurs as (a) single inclusions in chromite, with...iridium/PGE (IPGE) alloys and sulfarsenides, rather than laurite, and are all less than 5 ”m in size (usually less...oxides/hydroxides, in a matrix of silicates (with laurite existing only as small remnants), while any pure |  | | Journal (article/letter/editorial) | | Cu deposits, extending from Romania, Serbia and Bulgaria, (up to 4 ppm in in high grade ores) from the... Philippines (Tarkian and Koopmann, 1995), in Bulgaria (AugĂ© et al., 2005). Although the potential for...porphyry-Cu-Mo deposits from Greece (Skouries), Bulgaria (Elatsite, Medet, Assarel and Trar 99 Asen)...Greece has been 246 recorded by several authors. Laurite (RuS2) constitutes more than 75% of the PGM population...Pindos 250 ophiolite complex consist of Os-rich laurite as inclusion in chromite, sperrylite, exclusively |  | Malitch, Kreshimir N., Badanina, Inna Yu., Belousova, Elena A., Murzin, Valery V., Velivetskaya, Tatiana A. (2021) Origin of Ru-Os Sulfides from the Verkh-Neivinsk Ophiolite Massif (Middle Urals, Russia): Compositional and S-Os Isotope Evidence. Minerals, 11 (3) 329 doi:10.3390/min11030329 | Journal (article/letter/editorial) | | primary nature of Ru-Os sulfides represented by laurite (RuS2 )âerlichmanite (OsS2 ) series is supported...Published: 22 March 2021 Keywords: Ru-Os sulfides; laurite; erlichmanite; sulfur isotopes; osmium isotopes;...Ru-Os-Ir alloy, rimmed by secondary As-bearing laurite, irarsite (IrAsS), and tolovkite (IrSbS). Particularities...a combined mineralogical and isotope study of laurite (RuS2 )âerlichmanite (OsS2 ) series within a primary...one or several other PGM inclusions, including laurite RuS2 , kashinite Ir2 S3 , cuprorhodsite CuIr2 S4 |  | 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) | | inclusions in magnesiochromite grains (1â15 ÎŒm across). Laurite is dominant PGM phase, followed by erlichmanite...Economou-Eliopoulos, 2009a,b). Commonly, members of the lauriteâerlichmanite solid-solution series and OsâIr alloys...assemblages are dominated by IPGE-rich phases namely laurite, erlichmanite, irarsite, hollingworthite, unidentiïŹed...the whole-rock PGE data. Ruthenium is present in laurite, whereas Os mainly occurs as erlichmanite. Iridium...irarsite and is also carried in solid-solution in lauriteâerlichmanite and RuâNiâFe-rich sulïŹdes. Rhodium |  | Kutyrev, Anton V., Sidorov, Evgeniy G., Kamenetsky, Vadim S., Chubarov, Valery M., Chayka, Ivan F., Abersteiner, Adam (2021) Platinum mineralization and geochemistry of the Matysken zoned Ural-Alaskan type complex and related placer (Far East Russia). Ore Geology Reviews, 130. 103947pp. doi:10.1016/j.oregeorev.2020.103947 | Journal (article/letter/editorial) | | 8d). Other common PGM include laurite RuS2 and erlichmanite OsS2. Laurite forms euhedral crystals with... (f) composite inclusion of isoferroplatinum, laurite (Lrt), native iridium and tomamaeite (Cu3Pt). (a-d)...hexaferrum is often described to be the result of laurite-erlichmanite series mineral alter ation (Mochalov...Sulfides are represented by two abundant minerals, laurite RuS2 and erlichmanite OsS2, along with lesser amounts...cuproiridisite CuIr2S4 and very scarce cooperite PtS. Laurite and erlichmanite form the solid solution series |  | 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) | | 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 |  | | Journal (article/letter/editorial) | | geochemical data, Ru, Os, and Ir bearing PGE sulfide (laurite-erlichmanite solid solution series [(Ru,Os)S2â(Os...paragenesis. In addition to the most common PGM laurite, several osmium (Os,Ir), iridium (Ir,Os), irarsite...KızılyĂŒksek chromitites are mostly represented by laurite of ~2-10 ïm size. These phases within fresh Mg-chromite...% and <0.85 wt.%, respectively (Table 3). The laurite crystals of these chromitites are enriched in Ru...between 0.72 and 0.97 (Figure 9a). In addition to laurite, osmium and iridium were found as primary alloys |  | | Journal (article/letter/editorial) | | platinum-group minerals (PGM). The most abundant PGM is laurite which is rarely associated with irarsite ± OsâIr...included in unaltered zones of chromite (Fig. 5). Laurite is the most abundant PGM of the investigated chromitite...alloy were found to be associated with laurites. Laurite grains in high-Cr chromitites are richer in Ru...contents of laurite grains are between 2.07 and 8.80 wt.%, and are generally higher in laurite grains from...ophiolitic chromitites. Ru# = Ru/(Ru + Os); L: Laurite, I: Irarsite; Os-Ir: Os-Ir alloy; bdl = below detection |  | Gonzalez-Jimenez, J. M., Auge, T., Gervilla, F., Bailly, L., Proenza, J. A., Griffin, W. L. (2011) MINERALOGY AND GEOCHEMISTRY OF PLATINUM-RICH CHROMITITES FROM THE MANTLE-CRUST TRANSITION ZONE AT OUEN ISLAND, NEW CALEDONIA OPHIOLITE. The Canadian Mineralogist, 49 (6) 1549-1569 doi:10.3749/canmin.49.6.1549 | Journal (article/letter/editorial) | | phases, in accessory amounts: sulfides (mainly laurite, two unidentified OsâS and IrâS compounds) and...prĂ©sents mais plus rares, sous forme de sulfures (laurite principalement, et des composĂ©s OsâS et IrâS non...Os, Ru); they contain abundant minerals of the laurite (RuS2) â erlichmanite (OsS2) solid-solution series...sulfides (cooperite and malanite), RuâOsâIr sulfides (laurite and an unidentified IrâS compound), native Ru and...(Fig. 5A), twophase grains with pentlandite or laurite (Fig. 5B) and polyphase aggregates with cooperite |
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