New U-Th-Pb zircon data (SIMS) from three intrusive phases of the Palaeoproterozoic Viterliden intrusion in the western Skellefte District, central Fennoscandian Shield, dates igneous emplacement in a narrow time interval at about 1.89 Ga. A locally occurring quartz-plagioclase porphyritic tonalite, here dated at 1889± 3 Ma, is considered the youngest of the intrusive units, based on the new ag...

The origin of hypogene alteration and mineralization features in the Escondida porphyry Cu deposit resulted from intense overprinting related to three main hydrothermal stages. beginning each stage is recorded by deposition bright quartz crystals on vein walls that precipitated high-temperature fluids. In deepest zones deposit, earliest started with exsolution intermediate-density fluids, which...

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...

Preprint of Capape, S., Martín-Vide, J., and Colombo, F. (2016). “Subaqueous Barchans and 1 Plane Beds from Deposition of Quartz Silt.” J. Hydraul. Eng., 10.1061/(ASCE)HY.19432 7900.0001212, 06016020 3 Subaqueous Barchans and Plane Beds from Deposition of Quartz Silt 4 S. Capape*, J.P. Martín-Vide, and F. Colombo 5 Abstract 6 The suspension flow of quartz silt (geometric mean grain size of 4.15...

The Shuangwang gold deposit, with more than 70 tons of Au, is located in the Fengxian-Taibai ore concentration area Qinling Orogen central China, hosted a Northwest-trending breccia belt. Fragments body are cemented by ankerite, albite, quartz, calcite, and pyrite. Four metallogenic stages identified mineral paragenesis: quartz-albite, ankerite-pyrite-albite, pyrite-quartz-calcite, fluorite-anh...

Abstract. In this work we have performed a detailed study of vectors to ore representative volcanic-rock-hosted replacive volcanogenic massive sulfide (VMS) deposit located in the northern Iberian Pyrite Belt (Spain), Aguas Teñidas deposit. The investigated include following: (1) mineralogical zoning, (2) host sequence characterization and mineralized unit identification based on whole rock geo...

Gardaneshir Pb–Zn deposit is hosted by dolomitic carbonates which is located in the SW Ardestan, central Iran. Ore body is stratabound type in this deposit. Primary ores in this type are composed of sphalerite, galena, barite and quartz with massive, banded, veined and disseminated structures. Evaluation of ore-grade at the Gardaneshir Pb-Zn deposit, based on chemical analysis which indicates a...

Abstract Dongping is the largest Au-Te vein deposit (~120 t Au) in North China craton, but its age, origin, and setting remain unsolved. Here, we integrate paragenesis, geochemistry, situ U-Pb geochronology of garnet to constrain timing possible origin deposit. Gold mineralization at hosted Shuiquangou alkaline complex (ca. 401–390 Ma) dominated by quartz-sulfide veins with minor ores adjacent ...

introduction one of the first principles in the formation of a reserve is mineralogical, construction and mineral textures studies and investigation of paragenetic relations in the ore minerals. in addition, to petrographic studies, isotopic investigates have wide applications in economic geology. in general, copper isotope variability in primary (high temperature) mineralization forms a tight ...