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| Titel |
Mineralogical and geochemical investigation on podiform chromitites from the Guleman Ophiolite, eastern Turkey |
| VerfasserIn |
Recep Melih Akmaz, İbrahim Uysal, Samet Saka |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086905
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| Publikation (Nr.) |
 EGU/EGU2014-848.pdf |
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| Zusammenfassung |
| The chromitites of the Guleman ophiolites are mostly found in the mantle peridotites of
harzburgite and dunite, in a banded, massive and disseminated texture. The chromite
crystals of chromitites have a wide range of chemical compositions (Cr2O3 = 47–62
wt.% and Al2O3 = 5–19 wt.%). Having TiO2 contents lower than 0.33 wt.%, the
chromite crystals have their Cr# and Mg# values in the range of 61–89 and 55–73,
respectively, and these values support that those chromitites are podiform and ophiolitic in
origin.
The chromitites from the Guleman ophiolite have low whole-rock PGE (Platinum Group
Element) contents (PGE = 44–255 ppb, 168 ppb average). On the other hand, the Cr-rich
chromitites (Cr# >70; Mg# = 56–72) have lower TiO2 contents (-¤0.2 wt.%) and contain
relatively higher content of total PGE (mean 187 ppb) contents, whereas Cr-poor chromitites
(Cr# |
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