Experimentally deformed quartzo-feldspathic rocks
Figure caption
starting material & regime1 / regime 2 / annealing & melting
61
EA shortened 40% and dextrally sheared
(g
= 2.4) at 900°C, 10-5/sec, and 1200 MPa; recrystallized
ribbons of quartz, feldspar augen with tails.
EA subjected to dextral shear (g = 2.4, in a shear zone at 30 degrees to the external s1) plus compression (~40% shortening) at 900°C, 10-6/sec, 1200 MPa. The feldspar augen form sigma clasts, with asymmetric finely recrystallized tails. The quartz forms flattened ribbons. (W413)