RT Journal Article
T1 Nueva interpretación petrológica y tectónica de las anfibolitas pobres en calcio del antiforme de Arinteiro (NO del Macizo Ibérico). II: Estructura e implicaciones para la génesis de anfibolitas pobres en calcio
T1 New tectonic and petrologic interpretation of a Ca-poor amphibolites occurrence in the Arinteiro antiform (NW Iberian Massif). II: Structure and genetic implications for the Ca-poor amphibolites
A1 Gómez Barreiro, Juan
A1 Castiñeiras, Pedro
A1 Martínez Catalán, José R.
A1 Arenas, R.
AB The Arinteiro massif has a complex structure which includes shear zones, recumbent folds, thrusts and upright folds. Ca-poor amphibolites occur associated with the shear zones, although there is some controversy about the origin of such rocks. Shear zones could act as channel-ways for fluids during deformation, modifying the chemical composition of sheared rocks. Detailed field studies and fabric analysis show a close relationship between the impoverishment in calcium of the Arinteiro massif amphibolites and the ductile shear zones. A model to explain the evolution of Ca-poor amphibolites is proposed in which fluids are channelized by the shear zones, extracting calcium from the normal amphibolites. Moreover, calc-silicate rocks occur far from deformation zones and are considered to be metasomatic products of the interaction between Ca-rich fluids/common amphibolites
PB Sociedad Geológica de España
YR 2002
FD 2002
LK http://hdl.handle.net/10272/9362
UL http://hdl.handle.net/10272/9362
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026