Show simple item record

The isotopic evolution of fluids related with late and postvariscan hydrothermal cells of the Spanish Central System

dc.contributor.authorTornos, Fernando
dc.contributor.authorDelgado Huertas, Antonio
dc.contributor.authorCasquet Martín, César
dc.contributor.authorGalindo, Carmen
dc.contributor.authorReyes, E.
dc.description.abstractThe late to postvariscan hydrothermal activity of the Spanish Central System extends almost from ca. 300 Ma to the present. It consists of several Independent stages that can be grouped in two different hydrothermal regimes. There Is a first hydrothermal event (295±15 Ma) spatially related with minor intrusions of Late Variscan peraluminous granitoids. Here, highly confinated hydrothermal cells dominated by lithostatic pressure involve local fluids of complex composition and likely metamorphic origin; modified low-saline meteoric waters occur in the more distal manifestations only. Three recorded younger hydrothermal pulses (ca.274±6, 150±5 and 100 Ma) involving low-saline waters were channelized along regional structures. Here, waters of meteoric origin that infiltrate to a great depth into the basement, leading to a B1B0-shift of the fluids and a leaching of sulphur and metals from the host rocks. During upwelling, hydrothermal rocks are generated by fluid-rock interaction and boiling. In the shallow section of the system, the mixing with surficial complex brines led to the formation of fluoritebarite (Zn-Pb-Ag) veins, but no ffsO- 8D variation could be detecteden_US
dc.publisherSociedad Geológica de Españaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherSulphur isotopesen_US
dc.subject.otherSpanish Central Systemen_US
dc.titleLa evolución isotópica de los fluidos ligados a los Sistemas Hidrotermales tardi y postvariscos del Sistema Central Españolen_US
dc.titleThe isotopic evolution of fluids related with late and postvariscan hydrothermal cells of the Spanish Central Systemeng

Files in this item

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España

Copyright © 2008-2010. ARIAS MONTANO. Repositorio Institucional de la Universidad de Huelva
Contact Us | Send Feedback |