Publication: Presencia de Pillow-Lavas en las metavolcanitas submarinas de las proximidades de Espasante, Cabo Ortegal, NW de España
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1981
Authors
Peinado, Mercedes
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Servicio de Publicaciones de la Universidad Complutense de Madrid
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Abstract
Se describe por primera vez en el NW de la Península Ibérica una formación metavolcánica submarina constituida, esencialmente, por brechas de pillows fragmentadas y volcanitas masivas. Dos metamorfismos de bajo grado afectan al conjunto anterior: — El primero (M0) es un evento térmico con las características de un metamorfismo hidrotermal de fondo oceánico. — El segundo (M,) es un metamorfismo dinamotérmico regional similar al que afecta a las series pelítico-samíticas silúricas del flanco W del anticlinal del Barquero.
A submarine metavolcanic formation is described for the first time in NW Iberian Peninsula. It consists mainly of broken pillow breccías and massive flows. Two low-grade metamorphic events are found in these rocks: — The first one (M0) is a thermal event desplaying features of sea floor hydrothermal metamorphism. — The second one (M1) is a regional dynamo-thermal metamorphism resembling the one undergone by the Silurian peliticpsamitic series of the west side of Barquero’s anticline.
A submarine metavolcanic formation is described for the first time in NW Iberian Peninsula. It consists mainly of broken pillow breccías and massive flows. Two low-grade metamorphic events are found in these rocks: — The first one (M0) is a thermal event desplaying features of sea floor hydrothermal metamorphism. — The second one (M1) is a regional dynamo-thermal metamorphism resembling the one undergone by the Silurian peliticpsamitic series of the west side of Barquero’s anticline.