RT Journal Article
T1 Fábricas sin-metamórficas, mecanismos y régimen de la deformación en las granulitas de alta presión de Cabo Ortegal (NO de España)
T1 Syn-metamorphic fabrics, mechanisms and deformation regime in the high-pressure granulites of Cabo Ortegal(NW Spain)
A1 Puelles, Pablo
A1 Ábalos, Benito
AB High-pressure granulitic tectonites from shear zones at the contacts between the Bacariza Formationand its bounding units developed after eo-Hercynian subduction, during the initial exhumation of theCabo Ortegal complex. Structural, petrographic, and crystallographic analysis of these tectonites with theEBSD technique enables us to unravel different, syn-metamorphic, deformation mechanisms in the mineralsof the high-pressure granulitic assemblage. Dislocation creep and recovery were the main deformationmechanisms in garnet during peak metamorphism, followed by porphyroclast rigid rotation. The matrixminerals accommodated subsequent ductile deformation, still under high-pressure. Mass transfer, anisotropicgrowth and dislocation creep dominated deformation of augite. Subgrain rotation-recrystallisation by climbaccommodateddislocation creep operated in plagioclase and dislocation creep by <a>prism-slip inquartz. Subsequent, static amphibolite-facies retrogradation was followed by decompression-relatedmicrofracturing during exhumation through medium- to upper crustal realms. Ductile rock deformationwas non-coaxial and accommodated a top-to-the-NE displacement of hangingwall blocks
YR 2008
FD 2008
LK http://hdl.handle.net/10272/8188
UL http://hdl.handle.net/10272/8188
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 29 may 2026