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...

Abstract Pyrite geochemistry has proven useful for tracking changes in the composition and physico-chemical conditions of hydrothermal fluids ore-forming environments. Here, we investigated microtextural features chemical pyrite, a main Au-bearing phase Akeshi Kasuga deposits (Southern Kyushu, Japan), to better constrain processes these high-sulfidation epithermal Au deposits. Despite widesprea...

A phase-field model is proposed to simulate corrosion kinetics under a dualoxidant atmosphere. It will be demonstrated that the model can be applied to simulate corrosion kinetics under oxidation, sulfidation and simultaneous oxidation/sulfidation processes. Phase-dependent diffusivities are incorporated in a natural manner and allow more realistic modeling as the diffusivities usually differ b...