Gold has been found in the Cyprus-type volcanogenic massive sulfide ore (VMS) deposits of Corchia ophiolite (Parma province, Italy) in the Cantiere Donnini, Speranza and Pozzo mining sites. At Cantiere Donnini and Speranza, the mineralization occurs at the contact between pillow lava and sedimentary rocks. The Pozzo mineralization is hosted by a serpentinite. Concentrations of gold up to 3070 p...

The Lut Block is a potential porphyry-style mineralized region in Iran including the well-explored Shadan porphyry gold-copper deposit, which has an extensive zone of gold- and copper-bearing stockwork-like sheeted veins. structural setting this deposit key to understanding genesis mineralization. Our field studies show that mineralization occurs as steeply dipping ore bodies along NW–SE transp...

Mineralogical features of placer gold and gold-sulfide ore occurrences the Sololi river basin from uplift Olenek arch have been studied. According to typomorphic indicators, two types are distinguished. The first type is a tabular lumpy shape, often with mineral indentation imprints. inner structure represented by granulation, recrystallization, high-grade intergranular veins, shells typical in...

The geochemical features of the ores present in oxidation zone gold-copper Malmyzh mineral deposit are characterized. This is located Nanaian region Khabarovsk Territory Russian Federation, and a technological assessment was carried out. initial gold content oxidized ore 0.1–1.2 ppm, leachability from different size fractions by hot cyanide revealed fact that not refractory characterized increa...

The naturally occurring carbonaceous material (CM) in gold bearing ores often exhibits strongpreg-robbing properties. It can adversely affect the process of gold recovery during the cyanidation due to its ability to adsorb, or preg-rob gold from the cyanide leach solution. Treatments of carbonaceous ores with chemical surfactants as blinding agents to limit pregrobbing have shown promising resu...

Shear zone hosted lode gold type deposits at the El Bagre in northeastern of Antioquia department Colombia, are only evidence Permian mineralization to date Colombia Andes. Orebodies structurally controlled and considered as product ore-forming fluids derived from least two episodes fluid flow between shear zones, thus different could lead orebodies ore shoots plunge directions. The La Ye tend ...

Numerous research studies have been done to improve the gold recovery methods and to fi nd alternative processing techniques in the last decade. The main goal in this search has become to design an effi cient plant employing environmentally acceptable processes today. For this purpose, the application of environmentally friendly, no chemical included techniques like centrifugal gravity separato...

As a pre-treatment method of refractory gold ore, carbonaceous matter (C-matter) flotation was investigated with multi-stage by rougher, scavenger, and cleaner stages. Different dosages kerosene MIBC (4-Methyl-2-pentanol) were applied the optimum dosage selected testing in each stage. With combination stage, four circuit designs suggested, which single-stage rougher (R), rougher-scavenger (R+S)...

Freeport Indonesia is one of Freeport-McMoRan Copper & Gold Inc. affiliate companies. conducted a series mining and exploration processes for ore containing gold, silver, copper. Grasberg the location in PT Freeport, Indonesia. This research aimed to determine distribution gold (Au) particles rock samples with relatively high content. The method used analyzing content was Fire Assay. result...