WebThe eastern Sunda Arc in Indonesia contains four giant porphyry Cu-Au / high sulfidation epithermal gold deposits in Sumbawa and western Java. Numerous… 15 комментариев в LinkedIn WebThe seven gold-silver deposits within the district show common features such as multiple complex veins, an abundance (up to 30% in ore) of base-metal sulphides, a wide range of Ag/Au ratios and the common occurrence of carbonate. Quartz-vein textures indicate open-space-filling at shallow crustal levels.
B Type Veins in Porphyry Copper Systems - YouTube
Webin the valley bottom, with outcrops of porphyry vein stockwork plus sericite alteration. Drilling discovered the Kupfertal porphyry Cu-Au deposit (biotite ~10.7 Ma) at depths of 200-400 m below the valley floor, with grades up to 0.4 wt% Cu and 0.4 g/t Au, largely below the valley that bisects this world-class high-sulfidation district Webmineral deposit, aggregate of a mineral in an unusually high concentration. About half of the known chemical elements possess some metallic properties. The term metal, however, is reserved for those chemical elements that possess two or more of the characteristic physical properties of metals (opacity, ductility, malleability, fusibility) and are also good … how fast miralax work
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WebOct 28, 2024 · The granodiorite porphyry veins are exposed in the middle and lower parts of the deformed body on the left wing of the landslide. The surface rock veins are irregularly … WebHydrothermal alteration zones associated with porphyry copper deposit . Hydrothermal alteration is a geological process that occurs when hot, ... sometimes being limited to a … WebSep 5, 2024 · Stage 2, distributed alongside the JSF, is characterized by porphyry Mo and vein-type Pb–Zn–Ag mineralization related to I- and A-type granitoids at 145–125 Ma . Stage 3, mainly in the Cathaysia Block, consists of granite-related porphyry Mo mineralization and epithermal Pb–Zn/Au–Ag mineralization at 125–90 Ma [12,19]. how fast modrin tablets work