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Cretaceous extensión in the Cameros Basin (NW Iberían Chain): structural analysis of quartz-filled tension gashes y and study of fluid inclusions

dc.contributor.authorMata Campo, M. P.
dc.contributor.authorGil Imaz, Andrés
dc.contributor.authorCasas Sainz, Antonio
dc.contributor.authorPocoví Juan, Andrés
dc.contributor.authorCanals, Àngels
dc.description.abstractThe tectonothermal evolution of the Lower-Cretaceous Cameros basin is characterized from the analysis of dimensions and orientation of quartz-filled tension gashes and study of fluid inclusions within them. In the four sites studied in the eastern part of the basin the direction of tension gashes is N120E and most of them are perpendicular to bedding, what allows to relate them with synsedimentary extension. Local extension determined from thickness of quartz veins varies from 2 to 12%, w ith the lo w e st extension rates in strata where ductile boudinage linked to pseudo-cleavage development in incompetent beds occurs. Paleotemperatures obtained from the study of primary fluid inclusions indicate a v aria tion o f 3 0 ° C (80° C with pressure correction) between the bottom and top of the Urbion Croup, separated by 2.500 m of stratigraphic thickness. From these data it can be inferred that (1) the present-day northdipping geometry of beds is not a syn-sedimentary feature but was acquired during the Tertiary inversion and (2) the geothermal gradient was normal during the syn-rift stageen_US
dc.publisherSociedad Geológica de Españaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherTension gashesen_US
dc.subject.otherVery low-grade metamorphismen_US
dc.subject.otherFluid inclusionsen_US
dc.subject.otherCameros basinen_US
dc.subject.otherLower Cretaceous extensionen_US
dc.titleLa extensión cretácica en la Cuenca de Cameros: resultados del análisis estructural de grietas de cuarzo y del estudio de inclusiones fluidasen_US
dc.titleCretaceous extensión in the Cameros Basin (NW Iberían Chain): structural analysis of quartz-filled tension gashes y and study of fluid inclusionseng

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Atribución-NoComercial-SinDerivadas 3.0 España
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