%0 Journal Article
%T Estudio vulcanol¨®gico y qeoqu¨ªmico del maar de la Caldera del Rey. Tenerife (Canarias)
%A Paradas Herrero
%A A.
%A Fern¨¢ndez Sant¨ªn
%A S.
%J Estudios Geologicos
%D 1984
%I Consejo Superior de Investigaciones Cient¨ªficas
%X In this study a cartographic, morphological, geochemical and petrographic study is made of the ''Caldera del Rey". The "Caldera del Rey" is a volcanic structure formed by two overlapping maars, The second one (maar) that was formed is of greaten dimensions and destroyed part of the first one, Both maars erupted throught a possible fracture N 35 E, which is one of the directions with regional importance in the Archipelago. The eruption, which was very explosive, has been thought to be due in part to the great importance of the gaseous phase of the salic magma and also to the steam produced during the interaction of the magma with underground water. This explosivity can be clearly seen in the cleaf resalte cul out in the "Serie Bas¨¢ltica Antigua" to some extent penetrated and fragmented by the eruption, The phreatomagmatic character of the eruption is evident because of the existence of accretionary lapilli. The materials emitted are exc1usively of aerial projection: agglomerates, tuffs cinerites. There was no flow of lava. ' Some of the fragments of tuffs as cinerites and pumice are comagmatic. These correspond to salic trachytic phonolitic rocks, which represent one of the last stages of differentiation of the alkaline oceanic magmas. The geochemical character of the materials of the "Caldera del Rey" is characteristic and can be easily distinguished from other nearly salic deposits formed in different cycles. En este trabajo se hace el estudio cartogr¨¢fico, morfol¨®gico, petrogr¨¢fico y geoqu¨ªmico de la Caldera del Rey. La Caldera del Reyes un edificio volc¨¢nico formado por dos maars imbricados. El que se form¨® en segundo lugar es de mayores dimensiones y destruy¨® en parte el primero. Ambos aprovecharon para hacer erupci¨®n una posible fractura de direcci¨®n N 35'"E, de importancia regional en el Archipi¨¦lago. La erupci¨®n fue de una gran explosividad, que se supone debida, en parte, a la gran importancia de la fase gaseosa del magma s¨¢lico y en parte al vapor de agua originado durante la interacci¨®n del magma con agua subterr¨¢nea. Esta explosividad se pone de manifiesto en el resalte tallado en la Serie Bas¨¢ltica Antigua, atravesada y fragmentada en parte por la erupci¨®n El car¨¢cter freatomagm¨¢tico de la erupci¨®n se refleja por la existencia de lapilli acreecionario. Los materiales emitidos son exclusivamente de proyecci¨®n a¨¦rea: aglomerados, tobas y cineritas, no habi¨¦ndose originado coladas. Parte de los cantos de la toba son comagm¨¢ticos, y. al igual que las cineritas y el p¨®mez, corresponden a rocas s¨¢licas traqu¨ªtico-fonol¨ªticas, que representan los ¨²
%K Maar
%K Phreatomagmatic eruption
%K Salic rocks
%K Canary Islands.
%K Maar
%K Erupci¨®n freatomagm¨¢tica
%K Rocas s¨¢licas
%K Islas Canarias.
%U http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/671/698