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Minerals 2016, 6(3), 94;

Investigation of Platinum-Group Minerals (PGM) from Othrys Chromitites (Greece) Using Superpanning Concentrates

Faculty of Science, Physical and Geological Sciences, Jalan Tungku Link, Universiti Brunei Darussalam, Gadong, BE1410, Brunei Darussalam
Department of Geology, Section of Earth Materials, University of Patras, 26500 Patras, Greece
SGS Canada Inc., 185 Concession Street, PO 4300, Lakefield, ON K0L 2H0, Canada
Author to whom correspondence should be addressed.
Academic Editor: Federica Zaccarini
Received: 7 June 2016 / Revised: 29 August 2016 / Accepted: 30 August 2016 / Published: 12 September 2016
(This article belongs to the Special Issue Advanced Research on Accessory Minerals)
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Platinum-group minerals were concentrated using superpanning from two composite chromitite samples, which were collected from two old mines within the Othrys ophiolite. This method allows for the recovery of a broad spectrum of these rare and fine-grained minerals, and helps to better identify them and interpret their origin. Major differences between the east and west Othrys ophiolites were determined, probably as a result of their different origin and evolution. Primary Os-, Ir-, and Ru-bearing platinum-group minerals (IPGM)-alloys and the Rh-, Pt- and Pd-bearing platinum-group minerals (PPGM) occur only in the east Othrys chromitite, indicating an evolution from initially low fS2 conditions at shallower mantle levels with the subsequent implication of a S-saturated ascending fluid. In contrast, the absence of primary IPGM-alloys in west Othrys chromitite indicates that S saturation had been attained. The presence of erlichmanite suggests that sulphur fugacity eventually increased significantly in both suites. Substantial fluctuations of a fluid phase, likely related to serpentinising fluids, modified the platinum-group minerals (PGM) assemblage of west Othrys, and resulted in a large diversity of secondary PGM minerals. The limited number of secondary species developed in the east Othrys indicate that secondary processes were also different in the two suites. View Full-Text
Keywords: PGM; IPGE; PPGE; Othrys ophiolite; chromitite; Greece PGM; IPGE; PPGE; Othrys ophiolite; chromitite; Greece

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Tsikouras, B.; Ifandi, E.; Karipi, S.; Grammatikopoulos, T.A.; Hatzipanagiotou, K. Investigation of Platinum-Group Minerals (PGM) from Othrys Chromitites (Greece) Using Superpanning Concentrates. Minerals 2016, 6, 94.

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