Figure 3

Experimentally deformed quartz aggregates

Figure caption

Experimentally deformed quartz aggregates

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

3

HQ shortened 42% at 800°C, 10-6/sec and 1200 MPa; regime 2 dislocation creep.

HQ shortened 42% at 800°C, 10-6/sec and 1200 MPa, in the intermediate temperature dislocation creep regime (regime 2 of H & T). Temperature is high enough for dislocation climb to serve as the recovery process. Original grains have been fairly homogeneously flattened, and exhibit smooth and continuous undulatory extinction; sub-basal deformation lamellae are quite common (e.g. faint sub-parallel traces in white grain just NE of scale bar). Recrystallized grains form at original grain boundaries as a result of progressive subgrain misorientation. In this regime the subgrains and the recrystallized grains have about the same size, but both are too fine (~3-5 mm) to resolve optically in this photo. (W339)

		Experimentally deformed quartz aggregates
		Figure caption

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


3		HQ shortened 42% at 800°C, 10-6/sec and 1200 MPa; regime 2 dislocation creep. HQ shortened 42% at 800°C, 10-6/sec and 1200 MPa, in the intermediate temperature dislocation creep regime (regime 2 of H & T). Temperature is high enough for dislocation climb to serve as the recovery process. Original grains have been fairly homogeneously flattened, and exhibit smooth and continuous undulatory extinction; sub-basal deformation lamellae are quite common (e.g. faint sub-parallel traces in white grain just NE of scale bar). Recrystallized grains form at original grain boundaries as a result of progressive subgrain misorientation. In this regime the subgrains and the recrystallized grains have about the same size, but both are too fine (~3-5 mm) to resolve optically in this photo. (W339)