Figure 2

Experimentally deformed quartz aggregates

Figure caption

Experimentally deformed quartz aggregates

starting materials / semi-brittle & regime 1 / regime 2 / regime 2 & 3 / annealing

2

HQ shortened 65% at 850°C, 10-5/sec and 1200 MPa; regime 1 dislocation creep.

HQ shortened 65% at 850°C, 10-5/sec and 1200 MPa, in the lowest temperature dislocation creep regime (regime 1 of Hirth & Tullis, 1992). Temperature is too low for dislocation climb to operate as a recovery process. Strain is very inhomogeneous on the grain scale; parts of original grains remain as augen, whereas other parts appear as thin irregular ribbons. The undulatory extinction is strong and patchy. Dynamically recrystallized grains form by grain boundary migration but are extremely small (d~1 mm) and thus are not resolvable optically. (W374)

		Experimentally deformed quartz aggregates
		Figure caption

	Experimentally deformed quartz aggregates	starting materials / semi-brittle & regime 1 / regime 2 / regime 2 & 3 / annealing


2		HQ shortened 65% at 850°C, 10-5/sec and 1200 MPa; regime 1 dislocation creep. HQ shortened 65% at 850°C, 10-5/sec and 1200 MPa, in the lowest temperature dislocation creep regime (regime 1 of Hirth & Tullis, 1992). Temperature is too low for dislocation climb to operate as a recovery process. Strain is very inhomogeneous on the grain scale; parts of original grains remain as augen, whereas other parts appear as thin irregular ribbons. The undulatory extinction is strong and patchy. Dynamically recrystallized grains form by grain boundary migration but are extremely small (d~1 mm) and thus are not resolvable optically. (W374)