PETROGRAPHY, MINERAL CHEMISTRY AND GENESIS OF ALAND AND GHESHLAGH CHROMITE DEPOSITS, KHOY OPHIOLITE (NW OF IRAN)

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KANANIAN A.; ATAEI MANSOUR; MIRMOHAMMADI M.S.; EMAM ALIPOUR A.

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Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2010 | Volume:18 | Issue:3 Page(s): 0-0

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Information Journal Paper

Title

PETROGRAPHY, MINERAL CHEMISTRY AND GENESIS OF ALAND AND GHESHLAGH CHROMITE DEPOSITS, KHOY OPHIOLITE (NW OF IRAN)

Author(s)

KANANIAN A. | ATAEI MANSOUR | MIRMOHAMMADI M.S. | EMAM ALIPOUR A. | Issue Writer Certificate

Keywords

PODIFORM CHROMITESQ3

SUPRA SUBDUCTIONQ3

BONINITEQ2

KHOY OPHIOLITEQ2

IRANQ2

Abstract

The chromite deposits of Aland (Barajok and Kochak villages) and Gheshlagh area in the KHOY OPHIOLITE occur as layered, lenticular or irregular masses, surrounded by dunitie and harzburgites. These chromites are compositionally similar to alpine-type chromites, characterized by nodular, massive, disseminated and banded textures. EMPA data show that they varies widely in term of Cr-number [100Cr/Cr+Al]. On average, Cr# of chromites in harzburgites is 45.13, in disseminate Gheshlagh and Barajok chromites are 40.58 and 58.12 respectively but in Barajok and Kochak Chromitites are 66.7 and 73.43 respectively. The chromite composition in terms of Cr#, Mg#, Cr2O3, Al2O3, Fe2O3, MgO and TiO2 contents and also regarding to correlation coefficients between different oxides is comparable to podiform chromitites. The compositions of chromitites from Aland area with Cr#>66% and Gheshlagh area with Cr# about 40 wt% fall within high-Cr and high-Al types respectively. According to TiO2, Cr2O3 and Al2O3 content of the samples, it seems that the Aland chromites were formed from boninitic magmas in a supra-subduction zone although the Gheshlagh chromites were formed from tholeiitic magma in a geotectonic setting similar to the MORB.

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References

MINERALOGY OF ACCESSORY AND RARE MINERALS ASSOCIATED WITH CHROMITE DEPOSITS IN THE KHOY AREA

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APA: Copy

KANANIAN, A., ATAEI, MANSOUR, MIRMOHAMMADI, M.S., & EMAM ALIPOUR, A.. (2010). PETROGRAPHY, MINERAL CHEMISTRY AND GENESIS OF ALAND AND GHESHLAGH CHROMITE DEPOSITS, KHOY OPHIOLITE (NW OF IRAN). IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 18(3), 0-0. SID. https://sid.ir/paper/356981/en

Vancouver: Copy

KANANIAN A., ATAEI MANSOUR, MIRMOHAMMADI M.S., EMAM ALIPOUR A.. PETROGRAPHY, MINERAL CHEMISTRY AND GENESIS OF ALAND AND GHESHLAGH CHROMITE DEPOSITS, KHOY OPHIOLITE (NW OF IRAN). IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2010;18(3):0-0. Available from: https://sid.ir/paper/356981/en

IEEE: Copy

A. KANANIAN, MANSOUR ATAEI, M.S. MIRMOHAMMADI, and A. EMAM ALIPOUR, “PETROGRAPHY, MINERAL CHEMISTRY AND GENESIS OF ALAND AND GHESHLAGH CHROMITE DEPOSITS, KHOY OPHIOLITE (NW OF IRAN),” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 18, no. 3, pp. 0–0, 2010, [Online]. Available: https://sid.ir/paper/356981/en

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