Barika Gold Mineralization: A Gold-rich Volcanogenic Massive Sulfide Deposit in Iran

Category Economic geology & mineral exploration
Group GSI.IR
Location The 24 Symposium of Geosciences
Author Yarmohammadi, A. Rastad,E. Mohajjel,M. Shamsa,M.J.
Holding Date 15 August 2007

Abstract

Barika Au-Ag-(Zn-Pb-Cu) and barite mineralization occurred in a Cretaceous metavolcano-sedimentary sequence at northwestern Sanandaj-Sirjan zone. Mineralization occurred as lenticular orebodies in a meta-rhyolite to rhyolitic tuff host unit that has developed parallel to Barika shear zone foliation. Mineralization from footwall to hangingwall consists of: 1- Silica-sulfide zone, 2- Sulfide-sulfosalt rich zone, and 3- Massive barite zone. Concentrations of Au, Ag and other metals in this deposit are considerable. The grade of Au in some samples from sulfide-sulfosalt rich zone is more than 100 ppm. The most important characteristics of mineralization of the Barika deposit such as tectonic setting, host rocks, mineralogy, metal contents and wallrock alterations, shows similarities with gold-rich volcanogenic massive sulfide (VMS) deposits, e.g., Rosbery, Hellyer and Que River deposits in Tasmania and some Kuroko type deposits at Hokuroko Basin, Japan

tags: QAZVIN