 | | Journal (article/letter/editorial) | | PGE-rich Podiform Chromitites in the Al ‘Ays Ophiolite Complex, Saudi Arabia: An Example of Critical Mantle... Abstract The Al ‘Ays ophiolite complex in Saudi Arabia is an example of an ophiolite that contains anomalous...chromite grains in the chromitite within this complex have an unusually large range of composition; for...pentlandite, millerite, arsenides, and PGE-bearing awaruite. Mantle melting and subsequent crystallization...an optimum to concentrate PGE in the Al ‘Ays ophiolite complex. Crystallization of IPGE, commonly prior |  | | Journal (article/letter/editorial) | | Genesis of chromitites from Korydallos, Pindos Ophiolite Complex, Greece, based on spinel chemistry and PGE-mineralogy...Patras, Greece; kapsiotisa@yahoo.gr The Pindos Ophiolite Complex, located in northwestern Greece, hosts various...both metallurgical (high-Cr) and refractory (high-Al) type. In Korydallos are encountered both types of...[Cr/(Cr + Al): 0.65–0.68] and low platinum-group element (PGE) contents (294.1 ppb), whereas the Al-rich ones...T. The in concentrates mineralogical study of the Al-rich chromitites showed that the PGM assemblage that |  | | Journal (article/letter/editorial) | | isoferroplatinum cooled from magmatic temperatures (Nose et al. 2003). The trace element free areas could be such...formed in a range of geological environments (Cabri et al. 1996; Harris and Cabri 1991). One of the most common...the Earth’s core (Bird and Bassett 1980; Bird et al. 1999). Subsequent studies have suggested PGA are...process has been hypothesized to form FeNi nuggets (awaruite/josephenite) found in many ophiolites. Alternatively...(Brenker et al. 2003; Hattori and Cabri 1992; Okrugin 2011; Prichard and Lord 1996; Prichard et al. 2008) |  | | Journal (article/letter/editorial) | | cumulative dunite from crustal sections of the Neyriz ophiolite, southern Iran, were investigated for PGM and...composition of chromian spinels, Cr# [100*Cr/(Cr + Al) = 59-83], Mg# [100*Mg/(Mg + Fe2+) = 58-72], TiO2...hosted by chromian spinel grains from the Neyriz ophiolite can be divided into three categories: PGM, base-metal...Platinum-group elements, platinum-group minerals, ophiolite, chromitites, chromian spinel, Neyriz, Iran. ...et al. 1996, Gervilla et al. 2005, Proenza et al. 2006, Uysal et al. 2007, González-Jiménez et al. 2009 |  | González-Jiménez, J.M., Proenza, J.A., Gervilla, F., Melgarejo, J.C., Blanco-Moreno, J.A., Ruiz-Sánchez, R., Griffin, W.L. (2011) High-Cr and high-Al chromitites from the Sagua de Tánamo district, Mayarí-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) | | o m / l o c a t e / l i t h o s High-Cr and high-Al chromitites from the Sagua de Tánamo district, Mayarí-Cristal...Keywords: Ophiolitic chromitite High-Cr and high-Al chromian spinel Platinum-group elements Platinum-group...these bodies displays a large range in Cr# (Cr/Cr + Al) atomic ratio from 0.74 to 0.45. In high-Cr chromitites...opposite trend of variation in Cr# is observed in high-Al chromitites, although in this case Ti distributes...the type of chromian spinel (i.e., high-Cr or high-Al) in the chromitite coincide with a different behavior |
|
