Genesis and evolution of Iron-Copper mineralization in Dareh Rahim, south of Kashan, Iran

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Shojaian i.; AKBARPOUR A.; BAHARFIROUZI KH.; VANAEI M.

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Journal: GEOSCIENCES Year:2020 | Volume:29 | Issue:114 Page(s): 109-122

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Title

Genesis and evolution of Iron-Copper mineralization in Dareh Rahim, south of Kashan, Iran

Author(s)

Shojaian i. | AKBARPOUR A. | BAHARFIROUZI KH. | VANAEI M. | Issue Writer Certificate

Keywords

Calcic skarnQ1

Fe-CuQ1

MagnetiteQ2

Darre RahimQ2

KashanQ1

IranQ2

Abstract

The Darreh Rahim Iron deposit located in 2km northwest of Ghohroud village, 25 km south of Kashan, at the Uromieh-Dokhtar magmatic belt. An association of Paleozoic to Cenozoic rock units have been outcropped in the deposit district. The oldest outcropped rocks are dark colored, metamorphosed andesite, alternation of quartzite sandstone and dolomite and Cretaceous dark grey limestone. Based on the petrography data, the main intrusive body of district has medium to coarse granular texture and granodiorite, tonalite and granite composition that crosscut with dacite and rhyodacite dikes. Geochemical investigation on the intrusive body showed, an I type, calk-alkaline meta-aluminous, volcanic arc granite affinity. Injection of this intrusive body in the Eocene interlayer limestone caused the formation of skarn processes and related Iron mineralization. Based on the mineralography study, the main component of the ore is Magnetite mineral in association with hematite, goethite, and sulfide minerals such as chalcopyrite, pyrite and copper carbonate(malachite). The texture of ore body is massive, vein, veinlets and disseminated. The assemblages of chlorite, resulted from the alteration of pyroxene, garnet, Magnetite are the minerals that formed on the progressive stage of skarnization. Calcite, quartz, epidote, tremolite-actinolite, sulfide minerals (chalcopyrite, pyrite, covelite and so on) formed on the latest phase of progressive stage or on the earliest phase of regressive stage of skarnization. Based on geochemical data processing, there are relatively high correlations between different elements in the skarn rocks (Fe, Cu, Co, Ni)that can be used for approving the copper and Iron bearing Calcic type skarn. Also all evidences of mineralogy, structure and texture, geochemistry and tectonic setting and two axial diagrams comprising of Ni/(Cr+Mn) against Ti+V and Ca+Al+Mn against Ti+V, show that the mineralization in Darreh Rahim ore deposit is similar to calcic Fe-Cu skarn.

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APA: Copy

Shojaian, i., AKBARPOUR, A., BAHARFIROUZI, KH., & VANAEI, M.. (2020). Genesis and evolution of Iron-Copper mineralization in Dareh Rahim, south of Kashan, Iran. GEOSCIENCES, 29(114 ), 109-122. SID. https://sid.ir/paper/31518/en

Vancouver: Copy

Shojaian i., AKBARPOUR A., BAHARFIROUZI KH., VANAEI M.. Genesis and evolution of Iron-Copper mineralization in Dareh Rahim, south of Kashan, Iran. GEOSCIENCES[Internet]. 2020;29(114 ):109-122. Available from: https://sid.ir/paper/31518/en

IEEE: Copy

i. Shojaian, A. AKBARPOUR, KH. BAHARFIROUZI, and M. VANAEI, “Genesis and evolution of Iron-Copper mineralization in Dareh Rahim, south of Kashan, Iran,” GEOSCIENCES, vol. 29, no. 114 , pp. 109–122, 2020, [Online]. Available: https://sid.ir/paper/31518/en

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