RT Journal Article
T1 Crystallographic preferred orientations and microstructure of a Variscanmarble mylonite in the Ossa-Morena Zone (SW Iberia)
A1 Romeo Briones, Ignacio
A1 Capote Del Villar, Ramón
A1 Lunar Hernández, María Del Rosario
AB The mylonitic marbles of the Cherneca shear zone, a Variscan sinistral strike-slip structure developed in the Ossa-Morena Zone (SW Iberia)related to the emplacement of the Santa Olalla Igneous Complex, were studied in detail. Different mylonites (from protomylonites to ultramylonites)were analyzed by Electron Back-Scattering Diffraction (EBSD) in order to determine the crystallographic preferred orientation (CPO) ofcalcite. The CPOs show very good agreement with experimental torsion work giving suitable interpretations of the operative slip systems andstrain quantifications, thus the obtained natural CPOs validate the experimental approaches. A wide range of observed textures and microstructuresare mainly controlled by the amount of shear strain, the presence of secondary phases, and the development of antithetic subsidiary shears.The effect of secondary phases and the nucleation of antithetic shear bands on texture development are discussed.
PB Elsevier Science B.V., Amsterdam.
SN 0191-8141
YR 2007
FD 2007
LK https://hdl.handle.net/20.500.14352/49726
UL https://hdl.handle.net/20.500.14352/49726
LA eng
DS Docta Complutense
RD 2 oct 2024