TITLE:
Geochemistry of Chromitites in Eastern Part of Neyriz Ophiolite Complex (Southern Iran)
AUTHORS:
Pedram Attarzadeh, Mehrdad Karimi, Mohammad Yazdi, Kamal Nouri Khankahdani
KEYWORDS:
Ophiolite, Podiform Chromite, Neyriz, Iran
JOURNAL NAME:
Open Journal of Geology,
Vol.7 No.3,
March
14,
2017
ABSTRACT: The
Neyriz ophiolite complex is a part of NW-SE thrust belt (Late Cretaceous) of
Iran, which is over the Arabian plate margin. The complex is mainly composed of
the upper mantle rocks. Our research was focused on the eastern part of Neyriz
ophiolite complex so called as “Dowlat
Abad-Tang e Hana”. Mantle sequence of this ophiolitic complex is comprising
predominantly of harzburgite and minor lherzolite, dunitc sheaths and chromite
pods. Harzburgite is the most abundant ultramafic rock and is associated with
the less dunite masses. The chromites are known with Cr# 42 to 76 and Mg# 73 to
89. There is a negative correlation between Cr#-Mg# which is one of the
features of podiform chromites. The geochemistry of these chromites is consistent with the
overall composition of podiform chromites
in terms of Cr#, Mg#, the amounts of Cr2O3 (13.35% - 54.47%),
Al2O3 (0.43% - 8%), MgO (13.25% - 38.56%), TiO2 (0.003% - 0.206%)
as well as the correlations between various oxides and all of them are high
chromium types.