Crystal preferred orientations of garnet: comparison between numerical simulations and electron back-scattered diffraction (EBSD) measurements in naturally deformed eclogites

The nature of the Ailao Shan–Red River (ASRR) shear zone: Constraints from structural, microstructural and fabric analyses of metamorphic rocks from the Diancang Shan, Ailao Shan and Day Nui Con Voi massifs

“…Both the sillimanite growth and garnet flattening indicate temperature conditions above 600°C (Voegelé et al, 1998). Further, the garnet fabrics are similar to the pure shearing fabric pattern from numerical simulations (Mainprice et al, 2004). These findings are also consistent with the conclusion that there was a high-temperature pure shearing stage prior to the large-scale left-lateral simple shearing.…”

“…8k-m). Comparing the garnet fabrics from these samples with those reported by Mainprice et al (2004), we would argue that the garnet fabrics are generated by pure shear deformation (Mainprice et al, 2004) at high temperatures (>600°C, Voegelé et al, 1998). The Z point maxima in the {1 1 0} pole figures may be attributed to intensive slip on the {1 1 0} slip plane.…”

Effects of lattice preferred orientation and retrogression on seismic properties of eclogite

“…TEM studies revealed that most mantle garnets including eclogitic garnets have dislocations with a dominant slip system of <111>{110} (Zhang and Green, 2007b;Prior et al, 2000;Doukhan et al, 1994). Mainprice et al (2004) demonstrated with VPSC simulations that strong LPOs will develop in garnet with this well known dominant slip system. Therefore, it is difficult to argue dislocation creep for garnet with weak LPO and strong SPO.…”

Subduction interface processes recorded by eclogite-facies shear zones (Monviso, W. Alps)

“…This assumption is justified by the fact that garnet (less than 15 vol.% in the eclogitized basaltic crust) does not exhibit a strong fabric and generally behaves as a rotating rigid body during plastic deformation of eclogite (e.g. Mainprice et al, 2004). For Fe-Ti metagabbros, where the relative amount of garnet locally reaches 40 vol.%, an eclogite flow law is considered to be more appropriate (Jin et al, 2001).…”