Geology, Alteration, Mineralization and Fluid Inclusion Studies of Baloojeh Deposit; Typical Cu- Mo Porphyry Deposit in Arasbaran Magmatic Zone

Hosseinzadeh, M.R; Moayyed, M; Maghfouri, S; Alipour, S; Hajalilou, B

doi:10.22071/gsj.2015.42465

Geology, Alteration, Mineralization and Fluid Inclusion Studies of Baloojeh Deposit; Typical Cu- Mo Porphyry Deposit in Arasbaran Magmatic Zone

Document Type : Original Research Paper

Authors

M.R Hosseinzadeh ¹

M Moayyed ²

S Maghfouri ³

S Alipour ⁴

B Hajalilou ⁴

¹ Associate Professor, Department of Geoloy, Faculty of Natural Sciences, Tabriz University, Tabriz

² Professor, Department of Geoloy, Faculty of Natural Sciences, Tabriz University, Tabriz

³ Ph.D. Student, Department of Geoloy, Faculty of Natural Sciences, Tabriz University, Tabriz

⁴ M. Sc. Student, Faculty of Geoloy, Payame Noor University, Tabriz

10.22071/gsj.2015.42465

Abstract

The study area is located in Arasbaran Metallogenic Zone. The rocks of the Baloojeh region includes of Oligo-Miocene quartz-diorite porphyry, gabbro-diorite, quartz-monzonite and granodiorite. The quartz diorite is the main host rock of porphyry type Cu-Mo mineralization in the Baloojeh deposit, but also in the other intrusive porphyries, copper mineralization can be seen. Much of the mineralization in the Baloojeh deposit is dispersive and vein- veinlet type. Based on the structure, mineralogy and texture, the Baloojeh vein- veinlets can be divided into four different groups. These veins - veinlets contains sulfide (pyrite, molybdenite, chalcopyrite, boehrnite, galena, and sphalerite), hydroxide and oxide (magnetite, hematite and goethite) and carbonate (malachite and azurite) minerals. Similar to other Cu- Mo porphyry deposits, the Baloojeh deposit contains of potassic, phyllic, argillic and propylitic alterations. The parent magma of intrusives has calk-alkaline to shoshonitic character that implaced in a post-collisional magmatic arc. The fluid inclusion study has been done on the different groups of veinlets. These studies suggest high temperature (221- 381 C^°) and high salinity (5- 45 % NaCl) hydrothermal fluid and the occurrence of boiling phenomena in the ore- forming hydrothermal fluids of the Bloojeh deposit.

Keywords

Cu- Mo porphyry deposit

Alteration

Fluid inclusion

Baloojeh

Arasbaran zone