CR-SPINEL MINERAL CHEMISTRY AND TECTONIC SETTING OF LERDGARME-PAEIN PERIDOTITES IN THE EAST OF HAJIABAD, SE IRAN

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POOSTI M.; MOHAMMADI POORTAZIYANI R.; HAJHASANI H.; MORTAZAVI RAVARI S.M.

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Journal: GEOSCIENCES Year:2017 | Volume:26 | Issue:102 Page(s): 281-296

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Title

CR-SPINEL MINERAL CHEMISTRY AND TECTONIC SETTING OF LERDGARME-PAEIN PERIDOTITES IN THE EAST OF HAJIABAD, SE IRAN

Author(s)

POOSTI M. | MOHAMMADI POORTAZIYANI R. | HAJHASANI H. | MORTAZAVI RAVARI S.M. | Issue Writer Certificate

Keywords

CR-SPINELQ1

LERDGARMQ1

HAJIABADQ1

PERIDOTITEQ2

SSZQ1

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 Ti02 content (averaging 0.05 wt %) for chromian spinels in PERIDOTITEs. The Fe3+# is very low (<0.05 wt'l/o) in the chromian spinel of PERIDOTITEs which reflects crystallization under the low oxygen fugacity. The composition of olivineshows forsterite type (Fo90.97-92.63), orthopyroxene is enstatite, clinopyroxene is diopside and spinels areAl rich CR-SPINEL. Thermo-barometric study of Cpx-Opx suggested that the re-equilibrium temperature of PERIDOTITEs was 1100oC± 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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APA: Copy

POOSTI, M., MOHAMMADI POORTAZIYANI, R., HAJHASANI, H., & MORTAZAVI RAVARI, S.M.. (2017). CR-SPINEL MINERAL CHEMISTRY AND TECTONIC SETTING OF LERDGARME-PAEIN PERIDOTITES IN THE EAST OF HAJIABAD, SE IRAN. GEOSCIENCES, 26(102), 281-296. SID. https://sid.ir/paper/31486/en

Vancouver: Copy

POOSTI M., MOHAMMADI POORTAZIYANI R., HAJHASANI H., MORTAZAVI RAVARI S.M.. CR-SPINEL MINERAL CHEMISTRY AND TECTONIC SETTING OF LERDGARME-PAEIN PERIDOTITES IN THE EAST OF HAJIABAD, SE IRAN. GEOSCIENCES[Internet]. 2017;26(102):281-296. Available from: https://sid.ir/paper/31486/en

IEEE: Copy

M. POOSTI, R. MOHAMMADI POORTAZIYANI, H. HAJHASANI, and S.M. MORTAZAVI RAVARI, “CR-SPINEL MINERAL CHEMISTRY AND TECTONIC SETTING OF LERDGARME-PAEIN PERIDOTITES IN THE EAST OF HAJIABAD, SE IRAN,” GEOSCIENCES, vol. 26, no. 102, pp. 281–296, 2017, [Online]. Available: https://sid.ir/paper/31486/en

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