Document Type : Original Research Paper
Authors
1 Assistant Professor, Department of Geology, University of Hormozgan, Bandar Abbas, Iran
2 M.Sc. Student, Department of Geology, University of Hormozgan, Bandar Abbas, Iran
3 M.Sc., Esfahan Regional Water Authority, Esfahan, Iran
4 Associate Professor, Department of Geology, University of Hormozgan, Bandar Abbas, Iran
Abstract
The LerdGarm peridotite complex is one of the ultramafic complexes in south-east Iran . This complex is composed mainly of harzburgite dunite, lherzolite, and secondary listvenite and magnesite. The detailed electron microprobe study revealed very high Cr # (39.9-64.0), Mg # (51.2-65.63) and very low TiO2 content (averaging 0.05 wt %) for chromian spinels in peridotites. The Fe3+# is very low (C± 60 at a pressure of 26 Kbar. Tectonic environment discrimination diagrams for dunites show a suprasubduction environment of the arc setting and for the harzburgite and lherzolites show abyssal environment.
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