 | | 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...pyrite, nickeloan pyrrhotite, maucherite and gersdorffite, all of which form less than 1% of these rocks...compositions most typical of chromite from a stratiform complex of continental origin. Keywords: platinum-group |  | | Journal (article/letter/editorial) | | PGE-bearing sulfarsenide is a Pd-bearing cobaltite–gersdorffite solid solution. Other PGM identified include...Pd-bearing melonite. All grains of the cobaltite–gersdorffite solid solution and PGM are enclosed in pyrrhotite...1–0.5 wt% Pt. Euhedral grains of cobaltite– gersdorffite solid solution (<30 m in diameter) are zoned...relations suggest that the Pt-bearing cobaltite–gersdorffite solid solution crystallized before exsolution...crystallized as PGM and Pd-bearing cobaltite–gersdorffite solid solution at a lower temperature. Minor |  | | 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 |  | 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) | | minor Au are hosted in gersdorffite (NiAsS). Two generations of gersdorffite have been recognized. A...higher temperature magmatic euhedral Co-rich gersdorffite encloses Ir-, Pt- and Rh-bearing PGM surrounded...of Rh-, Ir-, and Os-rich gersdorffite. A lower temperature Ni-rich gersdorffite forms anhedral grains and...of nickeline (NiAs). In this low-temperature gersdorffite PGE are concentrated toward the mineral edges...controlled by the abundance of nickeline and gersdorffite. Early reports of the occurrence of PGE concentrations |  | 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...consists of nickeline, maucherite, rammelsbergite, gersdorffite and Ni-skutterudite. These Ni arsenides and...massive nickeline (54–1338 ppm Pt) and in zoned gersdorffite (29–360 ppm Pt) formed at the end of the depositional...concentrated only in the latest nickeline and gersdorffite. Key words: Ni arsenides, platinum-group elements...Complete solid-solution has been reported between gersdorffite – cobaltite (NiAsS DOI: 10.1127/0077-7757/2008/0113 |  | | Journal (article/letter/editorial) | | sulfide and sulfoarsenide mineralization: pyrite, gersdorffite, sphalerite, Ag–Bi and Bi-galena, millerite...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 |  | 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...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...of South Africa, the Rio Jacaré Sill in Bahia, Brazil (Sá et al. 2005), the Skaergaard Intrusion in Greenland...g., Nielsen et al. 2015), the Rincón del Tigre Complex in Bolivia (Prendergast 2000), the Birch Lake and |  | 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) | | 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...the Baijiazuizi complex that overlies schists and banded marbles of the Tamazigou complex; both complexes...crosscuts the marbles and gneisses of the Baijiazuizi complex and strikes roughly northwest–southeast, parallel...dividing the intrusion into sections. Originally, the complex was divided into mining areas III, I, II, and IV |
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