RT Journal Article
T1 Estructuras elípticas en el plutón de la Sierra del Francés: estudio de su geometría e hipótesis sobre su origen convectivo
T1 Elliptical structures in the Sierra del Francés pluton: study of their morphology and dicussion on their origin byconvective flow
A1 Pérez Soba, C.
A1 Villaseca, Carlos
A1 Rivas Rivas, Ana María
AB Direct 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°
PB Sociedad Geológica de España
YR 2002
FD 2002
LK http://hdl.handle.net/10272/9315
UL http://hdl.handle.net/10272/9315
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026