The Monte Santo Alkaline Intrusive Suite (MSAIS) is an association syenite foid, nepheline syenite and syenite. The MSAIS rocks are intruded in metapelites of the Rio do Coco meta-volcanic-sedimentary Sequence and are abundant pegmathoid veins cutting all of them. The mineral paragenesis is represented by aegirina, arfvedsonite, albite and nepheline, crystallized during the initial phase of cry...

Iron ox ide cop per gold (IOCG) de pos its are rec og nized world-wide and in clude a num ber of world-class, high-ton nage, low-grade Cu-Au de pos its that are typ i cally hosted in in tru sive-hy dro ther mal brec cias and in clude the Mesoproterozoic Olym pic Dam (Aus tra lia) and IgarapeBahia Alemao (Brazil) de pos its (Hitzman et al., 1992). In the Ca na dian Cor dil lera, nu mer ous Mesop...

A comparative analysis of typomorphic features gold placers and indigenous sources was carried out for the Glukharinsky ore-placer node (the Nadezhda deposit Glukharinskoye, Tyomnoye, Tyi-Jurye ore occurrences). correlation between fineness placer native composition relic minerals preserved inside particles obtained first time. This made it possible to establish mineral parageneses from potenti...