Page 46 - Microtectonics

34 3 · Deformation Mechanisms
Fig. 3.13.
TEM image of a network of free
dislocations decorated by micro-
fluid inclusions (grey circles), and a
subgrain wall defined by a closely
spaced array of dislocations. This
type of microstructure is typical for
dislocation creep deformation of
quartz. Bayas Fault zone, Spain.
Width of view 2 µm. (Photograph
courtesy Martyn Drury)

Fig. 3.14.
TEM image of a dislocation loop
in olivine from a kimberlite xeno-
lith. The dislocation loop is pinned
by small particles of ilmenite and
glass. (Photograph courtesy Martyn
Drury)