Abstract
Electron back-scatter diffraction (EBSD) was used to measure the crystal preferred orientations (CPOs) from 101 samples across the ultrahigh-pressure Western Gneiss region of Norway to assess slip systems, sense of shear, CPO strength, and strain geometry. The CPOs suggest a dominance of prism 〈a〉 slip, with lesser amounts of prism [c] slip and basal 〈a〉 slip; there are few Type I and Type II girdles. The major structural feature in the study area – the high-strain, top-W, normal-sense Nordfjord–Sogn Detachment Zone – is characterized by asymmetric and strong CPOs; an eastern domain with strong asymmetric CPOs shows top-E shear. Strain throughout the study area was characterized by a mix of plane strain and constriction with no evidence of flattening. Adjacent gneiss and quartzite/vein samples have similar CPOs.
- © The Geological Society of London 2010
INDIVIDUALS
Log in using your username and password
PURCHASE SHORT-TERM ACCESS
Pay Per Article - You may access this article (from the computer you are currently using) for 1 day for US$30.00
Pay per Volume - You may access this volume (from the computer you are currently using) for 7 days for US$200.00.
Regain Access - You can regain access to a recent Pay per Article purchase if your access period has not yet expired.