Figure 9

Experimentally deformed quartz aggregates

Figure caption

Experimentally deformed quartz aggregates

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

9

BHQ shortened ~ 40% at 900°C, 10-6/sec and 1200 MPa ('wet'); transition between regime 2 - 3 dislocation creep.

BHQ shortened 40% at 900°C, 10-6/sec and 1200 MPa, with ~0.2 wt % water added. This photo shows a higher strain portion of the same sample illustrated in #8. The original grains are not visibly flattened but have been about half consumed by relatively large dynamically recrystallized grains. Subgrains are present within original grains, but deformation lamellae are rare. In regime 3 the recrystallized grains tend to be substantially larger than the subgrains within original grains, again due to high grain boundary mobility. (CQ78)

		Experimentally deformed quartz aggregates
		Figure caption

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


9		BHQ shortened ~ 40% at 900°C, 10-6/sec and 1200 MPa ('wet'); transition between regime 2 - 3 dislocation creep. BHQ shortened 40% at 900°C, 10-6/sec and 1200 MPa, with ~0.2 wt % water added. This photo shows a higher strain portion of the same sample illustrated in #8. The original grains are not visibly flattened but have been about half consumed by relatively large dynamically recrystallized grains. Subgrains are present within original grains, but deformation lamellae are rare. In regime 3 the recrystallized grains tend to be substantially larger than the subgrains within original grains, again due to high grain boundary mobility. (CQ78)