 | | Journal (article/letter/editorial) | | COMPOSITION IN THE ALTERED AND DEFORMED BACURI COMPLEX, AMAPA, NORTHEASTERN BRAZIL HAZEL M. PRICHARD§ Department...Universidade Federal da Bahia, 40.170-290 Salvador, Bahia, Brazil PETER C. FISHER Department of Earth Sciences,...CF10 3YE, Wales, U.K. ABSTRACT In the Bacuri complex, Amapa, Brazil, there is good evidence for Pd mobility...whereas sulfide-bearing serpentinite contains sperrylite. Pd– Bi tellurides, including sobolevskite and...compositions most typical of chromite from a stratiform complex of continental origin. Keywords: platinum-group |  | | Journal (article/letter/editorial) | | solid solution. Other PGM identified include sperrylite, testibiopalladite, and Pd-bearing melonite....phase relations of the system FeAsS–NiAsS–CoAsS. Sperrylite and testibiopalladite crystals are up to 50–80...du platine suivants ont aussi été identifiés: sperrylite, testibiopalladite, et melonite palladifère....le système FeAsS–NiAsS–CoAsS. Les cristaux de sperrylite et de testibiopalladite, entre 50 et 80 m de...solid solution, violarite, and PGM, including sperrylite, testibiopalladite, sudburyite, omeiite, michenerite |  | Prichard, Hazel M., Mondal, Sisir K., Mukherjee, Ria, Fisher, Peter C., Giles, Nicolas (2018) Geochemistry and mineralogy of Pd in the magnetitite layer within the upper gabbro of the Mesoarchean Nuasahi Massif (Orissa, India) Mineralium Deposita, 53 (4) 547-564 doi:10.1007/s00126-017-0754-4 | Journal (article/letter/editorial) | | layer occurs at a high stratigraphic level in the complex and is nearly 4-km long and 5–12-m thick. The sections...to Pd-oxides, and other PGM including PtAs2 (sperrylite), RuS2 (laurite), and IrRhAsS Editorial handling:...are associated with secondary Cu minerals and sperrylite. Subsequent oxidation during weathering in the...Magnetitite . Chromitite . Sill-like layered igneous complex . Upper gabbro unit . Nuasahi Massif Introduction...ones include the Bushveld Complex (Barnes et al. 2004) and the Stella Complex (Maier et al. 2003) both |  | | Report (issue) | | in layered intrusives. Association: Paolovite, sperrylite, altaite, taimyrite, silver, polarite, talnakhite...Lukkulaisvaara layered intrusion, and the Burakovsky complex, Karelia; in the Kingash massif, eastern Sayan...Onverwacht mine, in the Merensky Reef, Bushveld complex, Transvaal, South Africa. At the Wellgreen Ni–Cu–PGE...the Sudbury igneous complex, Ontario, Canada. From the Bacuri complex, Amapá, Brazil. Additional localities...Sobolevskite, taimyrite, and Pt2 CuFe (tulameenite?) in complex talnakhite ore, Noril’sk orefield, Russia. Can |  | Mota-E-Silva, Jonas, Prichard, Hazel M., Suárez, 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) | | COMPOUNDS IN THE LIMOEIRO Ni-Cu-(PGE) DEPOSIT, BRAZIL JONAS MOTA-E-SILVA Votorantim Metais, Exploration...05423-180, Brazil University of Brasilia, Geosciences Institute, Brası́lia/DF, 70900-970, Brazil HAZEL M...Geosciences Institute, Brası́lia/DF, 70900-970, Brazil PETER C. FISHER School of Earth and Ocean Science...dependent on whether it is trapped in arsenide (sperrylite), which is very durable, or in bismuthotellurides...Limoeiro Ni-Cu(-PGE) sulfide deposit in northeastern Brazil was discovered in 2009 by geologists working for |  | Prichard, Hazel M., Knight, Robert D., Fisher, Peter C., McDonald, Iain, Zhou, Mei-Fu, Wang, Christina Y. (2013) Distribution of platinum-group elements in magmatic and altered ores in the Jinchuan intrusion, China: an example of selenium remobilization by postmagmatic fluids. Mineralium Deposita, 48 (6) 767-786 doi:10.1007/s00126-013-0454-7 | Journal (article/letter/editorial) | | liberation of Pd. Michenerite ([Pd, Pt]BiTe), sperrylite (PtAs2), and Au-bearing PGM are located in altered...inclusions from the Platreef deposit in the Bushveld Complex. Barnes et al. (2008) proposed that PGE remain...of about 1 ppm (Chai and Naldrett 1992a). This complex consists predominantly of ultramafic igneous rocks...PGM that occur in Jinchuan. Padmaite (PdBiSe), sperrylite (PtAs2), and irarsite (IrAsS) have been described...described by Prichard et al. (2005). Sperrylite, froodite (PdBi2), and michenerite ([Pd,Pt]BiTe) have also |  | | Journal (article/letter/editorial) | | Complex multistage genesis for the Ni–Cu–PGE mineralisation in the southern region of the Platreef, Bushveld...Bushveld Complex, South Africa D. Hutchinson and Judith A. Kinnaird In the southern portion of the Platreef...Ni–Cu–Pt-group element (PGE) mineralisation results from a complex interplay of pre-, syn- and post-magmatic processes...to the footwall contact. More compositionally complex sulphides are associated with felsic melt phases...antimonides, bismuthides, bismutho-antimonides and complex bismuthotellurides. Pt-bearing phases mostly occur |  | | Journal (article/letter/editorial) | | Rocks in the Rio Jacaré Intrusion, Northeastern Brazil J. H. S. SÁ, Centro de Pesquisa em Geofísica e...Universidade Federal da Bahia 40.170-290 Salvador, Bahia, Brazil S-J. BARNES, Sciences de la Terre, Université...bodies in the Rio Jacaré intrusion of northeastern Brazil. The intrusion hosting these magnetite bodies consists...cases with Co-Ni sulfarsenides and arsenides. Sperrylite (PtAs2) is the most abundant Pt mineral and is...mafic minerals have been altered to amphiboles, sperrylite may be altered to Pt-Fe alloys. Other alloys |  | Suárez, 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 Ni–Cu deposit, SW Spain. Mineralium Deposita, 45 (4) 331-350 doi:10.1007/s00126-009-0275-x | Journal (article/letter/editorial) | | the northeastern part the Santa Olalla plutonic complex (Fig. 1). This is a small and highly heterogeneous...volcanoclastic and carbonate rocks (Bodonal-Cala Complex) overlying Late Precambrian metasedimentary rocks...hypersthene–hornfels aureole surrounding the plutonic complex (Casquet 1980; Velasco 1976). The deposit consists...showing the location of the Santa Olalla Pluton Complex and the Aguablanca mine (Agb). Modified from Casquet...The post-magmatic evolution of the deposit is complex and includes a pervasive and intense polyphase |  | Bowles, J. F. W., Prichard, H. M., Suarez, S., Fisher, P. C. (2013) THE FIRST REPORT OF PLATINUM-GROUP MINERALS IN MAGNETITE-BEARING GABBRO, FREETOWN LAYERED COMPLEX, SIERRA LEONE: OCCURRENCES AND GENESIS. The Canadian Mineralogist, 51 (3) 455-473 doi:10.3749/canmin.51.3.455 | Journal (article/letter/editorial) | | IN MAGNETITE-BEARING GABBRO, FREETOWN LAYERED COMPLEX, SIERRA LEONE: OCCURRENCES AND GENESIS John F.W...magnetite-bearing gabbroic rocks of the Freetown Layered Complex, Sierra Leone for the first time. The PGM occurrences...arsenides and antimonides, possibly derived from sperrylite (PtAs2) and “mertieite” [Pd8(Sb,As)3 to Pd11(Sb...than the eluvial and alluvial PGM of the Freetown complex, which are predominantly Pt-Fe alloys, laurite...canadian mineralogist Introduction The Freetown complex of Sierra Leone is one of the platinum-group element-bearing |  | 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) | | PLATINUM-GROUP MINERALS IN THE SHETLAND OPHIOLITE COMPLEX DERIVED FROM ANOMALOUSLY ENRICHED PODIFORM CHROMITITES...Harold's Grave localities in the Shetland ophiolite complex have been well documented previously. The focus...Alluvial PGM have average sizes of 20 x 60 µm, with sperrylite the largest grain identified at 110 µm in diameter...PGM compared with the rocks. The more resistant sperrylite and irarsite– This is a 'preproof' accepted...surficial conditions. Keywords: Shetland ophiolite complex, Cliff, Harold's Grave, alluvial concentrates, |  | Mota-e-Silva, J., Prichard, H. M., Filho, C. F. Ferreira, Fisher, P. C., McDonald, I. (2015) Platinum-group minerals in the Limoeiro Ni–Cu–(PGE) sulfide deposit, Brazil: the effect of magmatic and upper amphibolite to granulite metamorphic processes on PGM formation. Mineralium Deposita, 50 (8) 1007-1029 doi:10.1007/s00126-015-0585-0 | Journal (article/letter/editorial) | | minerals in the Limoeiro Ni–Cu–(PGE) sulfide deposit, Brazil: the effect of magmatic and upper amphibolite to...igneous tubular conduit system in northeastern Brazil. Representative ores from the deposit have been...metamorphic melt formed during high-grade metamorphism. Sperrylite Editorial handling: C.M. Lesher and G. Beaudoin...13212-161, Brazil 2 Instituto de Geociências, Universidade de Brasilia, Brasília, DF 70900-970, Brazil 3 ...amphibolite to granulite facies metamorphism . Sperrylite . Ni–Cu–PGE sulfide deposit . Platinum-group |  | | Journal (article/letter/editorial) | | Cu3Pt, orcelite in carbonized serpentinite, and sperrylite and electrum in serpentinite. Sulfide mineralization...frequent wehrlite. The transitional cumulative complex is made up of rhythmic alternation of dunite, chromitite...anorthosite. The upper part of the cumulative complex is overlain by the so-called upper gabbro. Dolerite...precipitation with thiourea; chloride forms and their complex compounds were obtained, with subsequent quantitative...Characteristics of rocks pertaining to the Restitic Complex and Rocks That Host Mineralizing Intrusive Rocks |  | | Journal (article/letter/editorial) | | into Pyrite in the Fazenda Mirabela Intrusion, Brazil Robert D. Knight,1,†,* Hazel M. Prichard,1,** and...Brasília-DF 70910-900, Brazil Abstract The Fazenda Mirabela intrusion in Brazil hosts two zones of mineralization...accompanied by As-bearing platinum group minerals (PGM) sperrylite (PtAs2), and irarsite ([RhIrPt]AsS). These As-bearing...intrusion located in Bahia State, northeastern Brazil (Fig. 1), hosts the stratiform Santa Rita Ni-Cu...been omitted as the stratigraphy is slightly more complex. These plots demonstrate that S-poor dunite samples |  | Prichard, H. M., Fisher, P. C., McDonald, I., Knight, R. D., Sharp, D. R., Williams, J. P. (2013) The Distribution of PGE and the Role of Arsenic as a Collector of PGE in the Spotted Quoll Nickel Ore Deposit in the Forrestania Greenstone Belt, Western Australia. Economic Geology, 108 (8) 1903-1921 doi:10.2113/econgeo.108.8.1903 | Journal (article/letter/editorial) | | pentlandite. The PGM include sudburyite (PdSb), sperrylite (PtAs2), and irarsite (IrAsS). All six PGE and...also in Canada (Chen et al., 1993), O’Toole in Brazil (Marchetto, 1990), and the Rosie Nickel prospect...containing a major amount of Pt identified is sperrylite (PtAs2). The only other As-bearing PGM identified...in the center of a euhedral gersdorffite. One sperrylite occurs enclosed by quartz (Fig. Number of PGM...in different host minerals. 10I) and another sperrylite is in contact with gersdorffite, silicate, and |  | | Journal (article/letter/editorial) | | Hattori, 2002; Hinchey et al., 2003), the Coldwell Complex on the north shore of Lake Superior (Barrie et...organic fractions of soil near the Stillwater Complex (Fuchs and Rose, 1974). High Pd values, up to 2...Sutcliffe, 1990). The largest is the Lac des Iles Complex, which intruded tonalitic rocks and volcano-sedimentary...Lac des Iles greenstone belt. The Lac des Iles Complex hosts the Lac des Iles palladium mine, which has...the Lac des Iles Complex and hornblende gabbro in the southern part of the Complex (Fig. 2), are essentially |  | Parviainen, Annika, Gervilla, Fernando, Melgarejo, Joan-Carles, Johanson, Bo (2008) Low-temperature, platinum-group elements-bearing Ni arsenide assemblage from the Atrevida mine (Catalonian Coastal Ranges, NE Spain) Neues Jahrbuch für Mineralogie - Abhandlungen, 185 (1) 33-49 doi:10.1127/0077-7757/2008/0113 | Journal (article/letter/editorial) | | consists of banded and brecciated baryte rimmed by a complex polymetallic assemblage of Co-Ni-As-Bi-Ag(-U) ores...sulpharsenides (Canet et al. 2003a), as well as a complex assemblage of V, Cr and U minerals (Canet et al...rich löllingite, and b) as discrete PGM like sperrylite, stibiopalladinite, native palladium and a palladium...reported by Iwasaki et al. (1983) in the Duluth Complex, and for Pd and Ir in skutterudite because no previous...concentrated in the massive sulphide ores as sperrylite and hidden in solid-solution in löllingite, and |  | Mondal, Sisir K., Khatun, Sarifa, Prichard, Hazel M., Satyanarayanan, M., Kumar, G.R. Ravindra (2019) Platinum-group element geochemistry of boninite-derived Mesoarchean chromitites and ultramafic-mafic cumulate rocks from the Sukinda Massif (Orissa, India) Ore Geology Reviews, 104. 722-744 doi:10.1016/j.oregeorev.2018.11.027 | Journal (article/letter/editorial) | | associated with cracks in chromite grains and a small sperrylite grain attached to an Os-Ir-Ru alloy. All the...Sukinda Massif as part of an Archean ophiolitic complex. Acharyya (1993) suggested possibilities of the...craton; the Singhbhum Granite Complex is the largest batholithic complex (3.3 – 3.1 Ga; Mishra et al....contains a very small 2 x 0.5 micron grain of sperrylite attached to an Os-Ir-Ru alloy. All the As-bearing...and the Bacuri Complex in Amapa, Brazil (e.g., Prichard et al., 2017a). In the Kemi Complex in Finland |  | Barnes, Sarah-Jane, Prichard, Hazel M., Cox, Richard A., Fisher, Peter C., Godel, Belinda (2008) The location of the chalcophile and siderophile elements in platinum-group element ore deposits (a textural, microbeam and whole rock geochemical study): Implications for the formation of the deposits. Chemical Geology, 248 (3) 295-317 doi:10.1016/j.chemgeo.2007.08.004 | Journal (article/letter/editorial) | | of unmetamorphosed layered intrusions (Busveld Complex, South Africa and Great Dyke, Zimbabwe) ∼ 30 to...Zimbabwe, and the Merensky Reef of the Bushveld Complex, South Africa, primary igneous silicate minerals...sills, and hence the reef BMS could have a more complex crystallization history than the subvolcanic sills...approximately 44% Pd–Pt- bismuthotellurides, 20% PtAs2, (sperrylite), 23% Pd-arsenoantimonides or tellurides, 6%...present, these are both sulfarsenides. 3.4. Bushveld Complex, Merensky Reef We have performed a detailed study |  | | Journal (article/letter/editorial) | | Skutterudite Smithsonite Smythite Sodalite Sohngeite Sperrylite Sphalerite Sphene Spherocobaltite Spinel-group...mineralization may either be the product of a complex polyphase mineralizing process, reflecting a combination...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...intrusions of Archaean age such as the Bushveld Complex, South Africa. Stratiform Cr deposits account for | | | Journal (article/letter/editorial) | | Skutterudite Smithsonite Smythite Sodalite Sohngeite Sperrylite Sphalerite Sphene Spherocobaltite Spinel-group...mineralization may either be the product of a complex polyphase mineralizing process, reflecting a combination...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...intrusions of Archaean age such as the Bushveld Complex, South Africa. Stratiform Cr deposits account for |  | | Book | | Basement to the Shetland Ophiolite-complex 4 The Shetland Ophiolite-complex and Skaw Granite Information...geology of the basement to the Shetland Ophiolite-complex 26 Structure of the Valla Field and Lamb Hoga blocks...Saxa Vord Block 34 Six The Shetland Ophiolite-complex Introduction 37 The ophiolite nappes 37 The imbricate...Shetland Ophiolite-complex: tectonics and origins 92 A model for the Shetland Ophiolite-complex 92 Nine Cenozoic...Diagrammatic section through the Shetland Ophiolite-complex parallel to the restored Lamb Hoga Fault 7 5 Idealised |  | | Book | | elements (PGE). Using examples from the Bushveld complex of South Africa and other intrusions, this book...Deposits: Examples 2.4.1 The Bushveld Complex 2.4.2 The Stillwater Complex 2.4.3 Skaergaard Intrusion 10 10...1 Silicate Liquid Inclusions in the Stillwater Complex 7.2.2 Other Examples of Silicate Liquid Inclusions...Inclusions 7.3.1 Fluid Inclusions in the Stillwater Complex 7.3.2 Fluid Inclusions and Hydrosaline Melt Inclusions...Ultramafic Pegmatoids and Pipes of the Bushveld Complex 8.4 Bushveld Plutonic Diatreme 8.5 Existing Bushveld |
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