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oai:docta.ucm.es:20.500.14352/570272024-07-29T16:43:14Zcom_20.500.14352_14col_20.500.14352_15

Estructuras elípticas en el plutón de la Sierra del Francés: estudio de su geometría e hipótesis sobre su origen convectivo Pérez-Soba Aguilar, Cecilia María Villaseca González, Carlos Rivas Ponce, Antonio 552.3(234.1) Magmatic structures Granite Convection Sierra de Guadarrama Iberian Hercynian Belt Petrología Direct evidences or magmatic convective flow in granitic pluton are scarce. The possible complex history of magma cooling in pluton can delele 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 laminate). We propose a model of verticall flow pipes with motion or magma generation point. Three possible convective build the elliptical structure. This model is similar those proposed in the literature for snail and ladder dike structures. Fabric defined by K-feldspars megacryst in the inmediatelly surrounding is basically linear to 355·010º Depto. de Mineralogía y Petrología Fac. de Ciencias Geológicas TRUE pub 2023-06-20T16:47:38Z 2023-06-20T16:47:38Z 2002 journal article https://hdl.handle.net/20.500.14352/57027 0213-683X spa open access application/pdf Sociedad Geológica de España