1 Ocak 2018 Dergi makalesi Açık Erişim

Uysal, Ibrahim; Kapsiotis, Argyrios; Akmaz, R. Melih; Saka, Samet; Seitz, Hans Michael

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    "creators": [
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        "affiliation": "Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey", 
        "name": "Uysal, Ibrahim"
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      {
        "name": "Kapsiotis, Argyrios"
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      {
        "affiliation": "Bulent Ecevit Univ, Dept Geol Engn, TR-67100 Zonguldak, Turkey", 
        "name": "Akmaz, R. Melih"
      }, 
      {
        "affiliation": "Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey", 
        "name": "Saka, Samet"
      }, 
      {
        "affiliation": "Goethe Univ Frankfurt, Altenhoferallee 1, Frankfurt, Germany", 
        "name": "Seitz, Hans Michael"
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    "description": "Economically viable chrome ore bodies are hosted within a unit of pervasively serpentinized harzburgite in the Guleman mine of the homonymous ophiolite in SE Turkey. Chrome ores consist of m- to tens of m-scale tectonically imprinted chromitite bodies, showing semi-massive to massive texture and podiform to lenticular morphology. They are hosted in dunite envelopes of variable thickness and are composed of chromian spinel [Cr-spinel] with high Cr#[Cr/(Cr + Al) = 0.61-0.81] and Mg# [(Mg/Mg + Fe2+) = 0.56-0.72], and low TiO2 (0.06-0.33 wt%) content. Compositionally, they are divided into intermediate-Cr (CrSp#: 0.610.69) and high-Cr chromitites (Cr#Sp: 0.71-0.81). Chromian spinel from the intermediate-Cr chromitites is richer in Ni, Ti, Zn and Ga compared to that from the high-Cr chromitites. Both chromitite types show a general enrichment in IPGE (Os, Ir and Ru) over PPGE (Rh, Pt and Pd). The PGM assemblages of these chromitites are dominated by small (<= 6 mu m), idiomorphic inclusions of Ru-Os bisulfides and subordinate Os-Ir-Ru alloy in Cr-spinel. Bisulfides within the intermediate-Cr chromitites show a wider range of Os-for-Ru substitution than those hosted in the Cr-rich chromitites [Ru/(Ru + Os): 0.15-0.86 vs. 0.71-0.86, respectively].", 
    "doi": "10.1016/j.oregeorev.2017.12.017", 
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    "journal": {
      "pages": "98-113", 
      "title": "ORE GEOLOGY REVIEWS", 
      "volume": "93"
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    "publication_date": "2018-01-01", 
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      "title": "Dergi makalesi", 
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    "title": "The Guleman ophiolitic chromitites (SE Turkey) and their link to a compositionally evolving mantle source during subduction initiation"
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