Onzon-Kanbani area is a western flank of Mogok Metamorphic Belt where gold mineralization is hosted as auriferous quartz-vein with epithermal low-sulphidation characters. Mineralization is closely associated with NE-SW trending fracture or shear zone probably related to the dextral movement of the Sagaing Fault system. Mineralization related hydrothermal alteration is developed as narrow zones ...

isotopic and microthermometry results from sheikh-darabad cu-au indices in mianeh region, east-azarbaijan province, indicate cenozoic post-magmatic activities with developed adularia facies through an extended and neogene related alteration that is given rise to occurring silica vein systems as the main hosting locations for epithermal mineralization. the research evidence also has been coincid...

INTRODUCTION The term epithermal derives from the genetic classification scheme for hydrothermal ore deposits proposed by Lindgren (1933). On the basis of stratigraphic relationships in volcanic sequences, and by analogy with mineral and metal occurrences and mineral textures in active hydrothermal systems, Lindgren inferred that epithermal deposits formed at <200°C and <100 atmospheres (~100 b...

Numerous important Miocene and early Pliocene epithermal Au-Ag deposits are present in the northern Great Basin. Most deposits are spatially and temporally related to two magmatic assemblages: bimodal basaltrhyolite and western andesite. These magmatic assemblages are petrogenetic suites that reflect variations in tectonic environment of magma generation. The bimodal assemblage is a K-rich thol...

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...

Abstract The formation of crustal blocks enriched with gold (Au) deposits above subduction zones is intimately bound to the genesis and evolution magmatic-hydrothermal systems. A long-standing question, however, whether metal fertility these systems stems from distinct sources that are anomalously in Au or subsequent processes occurring during magma emplacement hydrothermal activity. Deseado Ma...