in studying of the in situ gravitational concentration process part feature for placer, the technological ability to transform the in situ massif placer structure is evident. the two main processes involved in altering the massif in situ have been examined and outlined in detail. the in situ disintegration of massif material results in a new massif gravitational stratification structure. regula...

Environmentally friendly pretreatment of double refractory gold ores (DRGO) to improve recovery without emitting pollutant gas is challenging. Sequential biotreatment, including iron-oxidizing microorganisms decompose sulfides, followed by the enzymatic decomposition carbonaceous matter, was recently developed. The effect acid washing 1 M HCl for 24 h between two bioprocesses evaluated using a ...

The Muteh gold deposit (NE of Golpaygan) in the central part of intrusive-metamorphic belt of Sanandaj-Sirjan zone comprises NW-SE trending gold-quartz vein occurred in metamorphic complex. Gold mineralization is associated with quartz veins that formed during regional deformation across the mylonitic zones in metamorphic rocks of predominantly meta-volcanic, gneiss and schist. The sulfidation ...

The Baghuo gold mine (Kuhzar) is located about 100 km S-SE of Damghan. The area is part of Torud- Chahshirin volcano- plutonic belt. The hosts of quartz – tourmaline veins are mainly granite, granodiorite and volcanic rocks such as andesite and dacite.  Mineralization occurs as a copper- gold bearing silica vein. Quartz, pyrite, chalcopyrite, gold, hematite, malachite, azurite, covellite and Fe...