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Elliptical structures in the Sierra del Francés pluton: study of their morphology and dicussion on their origin by convective flow

dc.contributor.authorPérez Soba, C.
dc.contributor.authorVillaseca, Carlos
dc.contributor.authorRivas Rivas, Ana María
dc.description.abstractDirect evidences of magmatic convective flow in granitic plutons are scarce. The possible complex history of magma cooling in plutons can delete partially or completely this registration. We describe a complex elliptical structure in a porphyritic monzogranite and the granitic fabric around this. We distinguish three zones based on the study of their morphology and internal structures (cross-cutting layering, curved schlierens, lobulated mafic-leucocratic laminaes). We propose a model of vertical flow pipes with motion of magma generation point. Three possible convective pulses build the elliptical structure. This model is similar those proposed in the literature for snail and ladder dike structures. Fabric defined by K-feldspars megacrysts in the immediately surrounding monzogranite is basically linear to 355-010°en_US
dc.publisherSociedad Geológica de Españaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherMagmatic structuresen_US
dc.subject.otherSierra de Guadarramaen_US
dc.subject.otherIberian Hercynian Belten_US
dc.titleEstructuras elípticas en el plutón de la Sierra del Francés: estudio de su geometría e hipótesis sobre su origen convectivoen_US
dc.titleElliptical structures in the Sierra del Francés pluton: study of their morphology and dicussion on their origin by convective floweng

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