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Differential alteration of acid volcanic rocks in the Riotinto area, Iberian Pyrite Belt, Spain

dc.contributor.authorDonaire Romero, Teodosio 
dc.contributor.authorToscano Macías, Manuel 
dc.contributor.authorValenzuela Aznar, Alfonso
dc.contributor.authorGonzález Roldán, Manuel Jesús
dc.contributor.authorPascual Martínez, Emilio
dc.description.abstractRegional hydrothermal alteration of rhyolitic rocks from the Odiel area, Iberian Pyrite belt, Spain, has been assessed through geochemical study. Disregarding volcanic facies, all rhyolites have similar immobile trace element contents. However, they show a contrasting hydrothermal alteration on currently used alteration plots: volcaniclastic rocks mainly plot as albitized rocks, whereas coherent rocks plot as weakly altered rocks. Also, a sharp contrast is shown between regional and focused, VHMS-related alteration trends. Differences in the degree of regional alteration between volcaniclastic and coherent rocks are to be related to contrasting permeability, resulting in different water-rock ratios during hydrothermal processes. Accordingly, coherent rocks are to be preferred as least-altered samples for mass balance and other geochemical purposesen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.subject.otherHydrothermal alterationen_US
dc.subject.otherGeochemistry rhyolitesen_US
dc.subject.otherIberian Pyrite Belten_US
dc.titleAlteración diferencial de las rocas volcánicas ácidas en el sector de Riotinto, Faja Pirítica Ibéricaen_US
dc.titleDifferential alteration of acid volcanic rocks in the Riotinto area, Iberian Pyrite Belt, Spaineng

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Atribución-NoComercial-SinDerivadas 3.0 España
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