Geochemistry, mineralogy and petrogenesis of Rudan North Ultramafics, Hormozgan province

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GHADAMI GH.R.; POOSTI M.

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Journal: GEOSCIENCES Year:2020 | Volume:29 | Issue:115 Page(s): 313-324

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Information Journal Paper

Title

Geochemistry, mineralogy and petrogenesis of Rudan North Ultramafics, Hormozgan province

Author(s)

GHADAMI GH.R. | POOSTI M. | Issue Writer Certificate

Keywords

Chromian SpinelQ1

HarzburgiteQ2

LherzoliteQ1

OphioliteQ2

RudanQ1

Abstract

The studied area is located in the north of Rudan city, Groom mountain, Hormozgan province in the contact area of the Zagros and Makran zones and some part ofKahnuj-Rudan-Minab Ophiolite belt. The studied ultramafic rocks include Lherzolite and Harzburgite, contains olivine, orthopyroxene, clinopyroxene and Chromian Spinel which is a minor mineral. Based on the geochemical data, the amount of CaO, MgO, TiO2 and V, these rocks belong to non serpentinized orogenic Ophiolites, also the high amounts of Mg# and Ni in the studied samples are the indication of that these rocks were formed in mantle conditions. According to microprobe data, the amount of Mg# in the Lherzolite olivines is between 91. 15 until 93. 24 and these olivines have forsterite quality. Lherzolite clinopyroxenes are also of the diopside quality, but spinels have poor chromian. Detailed microprobe studies on the spin el of these rocks, are the indication of the high amounts of Mg#(7 l-77) and Al2 0 3 (52. 98 to 46. 31Wt%) and low Cr# (14-22). Cr/Al proporation ofin Chromian Spinels ofLherzolites are equal to amounts 0. 19 and amount of Fe3+ in the Lherzolite spinels is very low (<0. 1 Wt%) that show the crystallization in the low amounts of oxygen fugacity. On the basis of the given whole rock geochemical data and Chromian Spinels mineral chemistry, studied samples are located in oceanic peridotites tectonic position (abyssal), and are formed in the mid-oceanic ridges (MORE).

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APA: Copy

GHADAMI, GH.R., & POOSTI, M.. (2020). Geochemistry, mineralogy and petrogenesis of Rudan North Ultramafics, Hormozgan province. GEOSCIENCES, 29(115 ), 313-324. SID. https://sid.ir/paper/402810/en

Vancouver: Copy

GHADAMI GH.R., POOSTI M.. Geochemistry, mineralogy and petrogenesis of Rudan North Ultramafics, Hormozgan province. GEOSCIENCES[Internet]. 2020;29(115 ):313-324. Available from: https://sid.ir/paper/402810/en

IEEE: Copy

GH.R. GHADAMI, and M. POOSTI, “Geochemistry, mineralogy and petrogenesis of Rudan North Ultramafics, Hormozgan province,” GEOSCIENCES, vol. 29, no. 115 , pp. 313–324, 2020, [Online]. Available: https://sid.ir/paper/402810/en

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