Investigation on the Alteration-Mineralization Haloes and Distribution Patterns of Cu, Au, Ag and Mo in the Miduk Porphyry Copper Deposit, Shahr-Babak, Kerman

Taghipour, N.; Aftabi, A.; Ramezani, M.R.

doi:10.22071/gsj.2010.57137

Document Type : Original Research Paper

Authors

¹ Department of Geology, Faculty of Sciences, Shahid Bahonar University, Kerman, Iran

² Geology Office, Mine Affairs, Miduk Copper Complex, Kerman, Iran

https://doi.org/10.22071/gsj.2010.57137

Abstract

The Miduk porphyry copper deposit is located in 85 Km northwest of Sarcheshmeh porphyry copper deposit, Kerman province. The deposit is hosted by Eocene volcanic rocks of andesite-basalt composition. The porphyry-type mineralization is associated with two calc-alkaline intrusive phases (P₁ and Miduk porphyry) of Miocene age. Five hypogene alteration zones are distinguished in the Miduk deposit, magnetite-rich potassic, potassic, potassic-phyllic, phyllic and propylitic. The main stage of mineralization consists of chalcopyrite, magnetite and anhydrite in potassic alteration zone. The mineralization is mostly associated with Miduk porphyry intrusive phase. Three different types of biotite including magmatic, magmatic affected by hydrothermal fluids and secondary are distinguished at the Miduk deposit. Magmatic type biotites affected by hydrothermal fluids and secondary biotites contain higher X_Mg values than the magmatic biotites. The X_Mg are positively correlated with Si, Al, Mg, K, Mg/Ti, but negatively correlated with Al×Ti, Fe, Na, Fe/Ti contents. The variations of Cu, Mo, Au and Ag are controlled by vein - type alteration and mineralization zones. The tonnage of deposit is about 170 Mt with average grade of 0.82 % Cu, 0.007% Mo, 82 ppb Au and 1.8 ppm Ag, respectively. Highest values of Mo and Au occur in leached and oxide, supergene sulfide mineralization, phyllic and potassic-phyllic alteration zones, respectively. Gold displays positive correlation with Cu in magnetite-rich potassic and potassic alteration zones. Based on petrography, mineralogy, alteration halos and patterns of Cu, Au, Ag and Mo, the Miduk porphyry copper deposit is similar to those of continental arc setting porphyry copper deposits.

Keywords

20.1001.1.10237429.1388.18.72.6.4

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Scientific Quarterly Journal of Geosciences

Investigation on the Alteration-Mineralization Haloes and Distribution Patterns of Cu, Au, Ag and Mo in the Miduk Porphyry Copper Deposit, Shahr-Babak, Kerman

References

References

Volume 18, Issue 72 - Serial Number 72
January 2009
Pages 45-54

Investigation on the Alteration-Mineralization Haloes and Distribution Patterns of Cu, Au, Ag and Mo in the Miduk Porphyry Copper Deposit, Shahr-Babak, Kerman

References

References

Volume 18, Issue 72 - Serial Number 72January 2009Pages 45-54

Volume 18, Issue 72 - Serial Number 72
January 2009
Pages 45-54