Abstract The punctuated distribution of major gold deposits along orogenic belts is poorly understood. In northern Perú, cluster trends that transect the subparallel Phanerozoic accreted onto western margin Archean–Proterozoic Amazonian craton. This suggests influence as yet unrecognized pre-Andean basement structures in controlling localization deposits. We report newly discovered Tomac ophiol...

Located on the west coast of Pacific Ocean, Jiaodong gold concentration area is one world's famous deposit areas. Its unique metallogenic environment and background are favored by geologists all countries, multi-level multi-disciplinary scientific research work has been carried out in this area, good results have achieved. Linglong deposit, located 20 km northeast Zhaoyuan, Shandong, a quartz v...

Mita is a moderate temperature geothermal system that was discovered in 1997 during gold exploration in south-eastern Guatemala. This system is associated with bimodal basaltrhyolite volcanism, and occurs alongside (and overlapping with) the Cerro Blanco 2 million ounce epithermal gold deposit. Four 1000-1500m deep slim holes were drilled in 2008-09 to confirm the nature of the deep reservoir. ...

At the orogenic gold deposits of Yana–Kolyma metallogenic belt (northeast Russia) both Au–quartz-sulfide mineralization with native and disseminated sulfide invisible Au developed. The textural mineralogical-geochemical features, isotope-geochemical characteristics gold-bearing sulfides from proximal metasomatites, possible forms occurrence in pyrite arsenopyrite have been studied using electro...

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 Vancouver Composite Index fell by over 25% in less than six weeks during spring 1997 as the junior mining sector collapsed. We argue that this market collapse was triggered by the failure of Bre-X Minerals when that company’s Indonesian claims, previously believed to contain the world’s largest gold deposit, were shown to be pure fraud. Our event study, based on market returns for the Vanco...

The Baranyevskoe Au-Ag epithermal deposit of low-sulfidation (LS) type is located on the Kamchatka Peninsula in Neogene-Quaternary Central Volcanic Belt, where Au-bearing quartz veins are usually accompanied by veinlet stockworks. Two economic associations typical deposit. first corresponds to gold-pyrite-quartz association with low-grade native gold (521–738‱) intergrown pyrite. Some accessory...