Fluid inclusion and stable isotope study of the Gazestan magnetite-apatite deposit, Central Iran

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AFZALI S.; NEZAFATI N.; GHADERI M.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: GEOSCIENCES Year:2016 | Volume:26 | Issue:101 Page(s): 35-44

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Information Journal Paper

Title

Fluid inclusion and stable isotope study of the Gazestan magnetite-apatite deposit, Central Iran

Author(s)

AFZALI S. | NEZAFATI N. | GHADERI M. | Issue Writer Certificate

Keywords

Magnetite-apatite depositQ1

Fluid inclusionsQ1

Stable isotopesQ2

GazestanQ1

BafqQ2

Abstract

The Gazestan magnetite– apatite deposit is located 78 km east of Bafq, in the Bafq-Poshtebadam subzone of the Central Iran structural zone. The rock units in the area belong to the Rizou series and consist of carbonate rocks, shale, tuff, sandstone and volcanic rocks. Intrusive rocks in the form of stock and dyke crop out as granodiorite and granite in various places. Trachytic and dacitic rocks in the area are green due to chloritic alteration and host iron and phosphate mineralization. The main alteration types are chloritic and argillic, while sericitic, potassic, and silicic alterations as well as tourmalinization and epidotization are also found in the rock units. Five forms of mineralization are distinguished in the Gazestan deposit, including massive iron ore with minor apatite, apatite-magnetite ore, irregular vein-veinlets (stockwork) in the brecciated green rock and disseminated and monomineralic massive apatite veins. Fluid inclusion studies were conducted on the apatites of two stages. According to these studies, temperature and salinity values in the stage-I apatite are higher than those in stage-II apatite. Lower salinity values in the stage-II apatite could be due to contamination of magmatic fluids with meteoric waters during later stages of mineralization. Oxygen, hydrogen and carbon stable isotope composition of magnetite, quartz, apatite and calcite; and calculation of oxygen isotope composition in the fluid equilibrated with the oxide minerals suggest mixing the magmatic fluids with basin brines in mineralization of the Gazestan deposit.

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APA: Copy

AFZALI, S., NEZAFATI, N., & GHADERI, M.. (2016). Fluid inclusion and stable isotope study of the Gazestan magnetite-apatite deposit, Central Iran. GEOSCIENCES, 26(101 ), 35-44. SID. https://sid.ir/paper/31841/en

Vancouver: Copy

AFZALI S., NEZAFATI N., GHADERI M.. Fluid inclusion and stable isotope study of the Gazestan magnetite-apatite deposit, Central Iran. GEOSCIENCES[Internet]. 2016;26(101 ):35-44. Available from: https://sid.ir/paper/31841/en

IEEE: Copy

S. AFZALI, N. NEZAFATI, and M. GHADERI, “Fluid inclusion and stable isotope study of the Gazestan magnetite-apatite deposit, Central Iran,” GEOSCIENCES, vol. 26, no. 101 , pp. 35–44, 2016, [Online]. Available: https://sid.ir/paper/31841/en

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