Determination of Activated Slip Systems in Experimentally Deformed Olivine- Orthopyroxene Polycrystals using EBSD

Abstract

It is concluded: (1) that EBSD analysis can be confidently used to identify dislocation slip systems that produce subgrain boundaries in olivine crystals, (2) that the observed strength variations between the sample sets were not related to the activation of different dislocation slip systems, and (3) that specific dislocation slip systems may be dominantly activated in specific volumes inside crystals and not homogeneously throughout the grains.

Electron backscatter diffraction (EBSD) study of seven heavily metamorphosed chondrites: Deformation systematics and variations in pre-shock temperature and post-shock annealing

“…Misorientation boundary data for olivine based on large area maps (Table 2) and for targeted areas (Table 3) derived from CRA plots allow inferences to be made of the slip systems that were responsible for deformation (de Kloe et al, 2002;Farla et al, 2011).…”

Transient Creep in Subduction Zones by Long‐Range Dislocation Interactions in Olivine

“…The misorientation axes are primarily approximately parallel to [010] with a subpopulation forming a girdle in the misorientation inverse pole figures extending toward [001] (Figure 2). Misorientation axes parallel to [010] indicate the presence of either tilt walls composed of (001)[100] or (100)[001] edge dislocations or twist boundaries composed of screw dislocations with [100] and [001] Burgers vectors (de Kloe et al., 2002). Misorientation axes parallel to [001] indicate the presence of tilt boundaries composed of (010)[100] edge dislocations (de Kloe et al., 2002).…”

Can the Magmatic Conditions of the Martian Nakhlites be Discerned via Investigation of Clinopyroxene and Olivine Intracrystalline Misorientations?

“…Colors indicate different slip‐system regions. (a) Orthorhombic fundamental region slip‐system key modified from (De Kloe et al., 2002; Ruzicka & Hugo, 2018) with a sketch of an olivine crystal illustrating its orthorhombic symmetry. (b) Temperature versus strain rate modified from (Katayama et al., 2004).…”

“… Olivine (forsterite; mmm (2/m); unit cell lengths a = 4.66, b = 10, c = 5.87 angstrom) crystallographic slip‐system signature key (notated as the slip plane and slip direction) expressed as the orthorhombic crystallographic fundamental sector (lowest form of crystal symmetry; modified from De Kloe et al. (2002); Ruzicka and Hugo (2018)]. The corners of the key refer to olivine's specific crystallographic axis (< a > = [100], < b > = [010], and < c > = [001]).…”