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Showing 1 to 6 of 6 for “"alunite"”.
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Geology, geochemistry, and genesis of the El Peñón epithermal Au-Ag deposit, northern Chile : characteristics of a bonanza-grade deposit and techniques for exploration
… fluid produced lithocaps of massive quartz-alunite alteration, quartz-alunite cemented breccia, and, locally, weak Cu mineralisation above inferred Late Cretaceous and Eocene intrusions. Adularia from the two largest veins is dated at 52 to 53 Ma (40Ar/39Ar), indicating formation 1 to 3 m.y. …
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Petrography and Field Mapping of Eocene Intrusions and Adjacent Breccia Zones at the Scraper Springs Prospect, Elko County, Nevada
… several different events. Early vuggy quartz-alunite alteration is common throughout both breccia zones and is followed by an advanced argillic assemblage containing zones of pyrophyllite, topaz, kaolinite, and alunite. Late chalcedony overprints much of the earlier alteration. In general, …
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ΕΞΕΥΓΕΝΙΣΜΟΣ ΤΩΝ ΚΑΟΛΙΝΩΝ ΤΗΣ ΝΗΣΟΥ ΜΗΛΟΥ
… THE OPTIMUM SELECTIVEPOLYMER ADSORPTION ON THE ALUNITE AND S102 MINERALS SURFACE. C) THE POLYMER FLOCCULANTS USED, CMC PRODUCED THE BEST RESULTS. THE CATIONIC NALCO 600 PRODUCED LESS SATISFACTORY RESULTS. THE AMPHOTERIC SEPARAN NP10 CAUSED SELECTIVE FLOCCULATION, BUT THE SEPARATION WAS NOT SO …
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The mobility of metals in acid mine drainage from abandoned coal mines
… and quartz, in equilibrium with jurbanite, alunite and gypsum, and undersaturated with respect to ferrihydrite and kaolinite. The mobility of iron in the sulphate rich Blesbokspruit waters appeared to be controlled by pyrite oxidation and the solubility of the basic iron sulphate mineral …
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Deportment of radionuclides in copper concentrate from Olympic Dam
… monazite, baryte, anglesite, and Sr- and Ca-rich alunite-series phases. Mechanisms for surface-sequestration of RNs in high surface area minerals such as covellite and molybdenite have been identified, as well as electrokinetic effects responsible for substantial uptake of RNs on the surface of …
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The mineralogical deportment of radionuclides in South Australian Ca-Au-(U) ores
… aluminium-phosphate-sulphates (APS) of the alunite supergroup are a minor component of the Olympic Dam orebody. They appear paragenetically late, often replacing earlier REE-minerals. Characterisation of these compositionally zoned phases allowed them to be defined as minerals that span the …