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Showing 1 to 5 of 5 for “"hydrothermal breccia"”.
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Lithofacies and Microfacies of a Fossil Hot Spring System: McGinness Hills, Nevada
… Hills is a ‘decapitated’ system in which hydrothermal, eruption breccia is exposed on top of the sinter mound. Based on lithology, macro-features and micro-features the sinter at McGinness Hills was divided into seven microfacies, hydrothermal breccia, massive chalcedonic sinter, …
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Lithofacies and Microfacies of a Fossil Hot Spring System: McGinness Hills, Nevada
… Hills is a ‘decapitated’ system in which hydrothermal, eruption breccia is exposed on top of the sinter mound. Based on lithology, macro-features and micro-features the sinter at McGinness Hills was divided into seven microfacies, hydrothermal breccia, massive chalcedonic sinter, …
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Petrography and geochemistry of hydrothermal breccias hosted in the Schrikkloof Formation (Rooiberg Group), north of Modimolle, South Africa
… Formation, composed of rhyolites, tuffs and hydrothermal breccias, is the youngest rhyolitic volcanic sequence of the Rooiberg Group of the Bushveld Igneous Complex and is known to host polymetallic Sn-F-REE. The aim and objective of this research is to understand whether the hydrothermal …
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Physical and chemical aspects of fluid evolution in hydrothermal ore systems
… at 700°C). Fluid evolution during the magmatic-hydrothermal transition and coincident molybdenite precipitation at Questa, New Mexico, has been traced using fluid inclusion microthermometry. The lack of cogenetic liquid- and vapor-rich inclusions, plus final homogenization of most saline, …
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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
… composition rocks record the effects of hydrothermal activity not related to precious metal mineralisation of the El Peñón deposit. Rocks in the district display two distinct types of hydrothermal alteration: widespread alteration associated with near-neutral pH, reduced fluid and …