Figure 42

Experimentally deformed feldspar aggregates

Figure caption

Experimentally deformed feldspar aggregates

Starting material / cataclastic flow / regime 1

42

BA shortened 31% at 300°C, 10-5/sec, and 800 MPa; macroscopically ductile cataclastic flow.

BA shortened 31% at 300°C, 10-5/sec, 800 MPa. At these conditions there is no dislocation glide or mechanical twinning; the samples deform by distributed cracking, including multiple grain-scale faulting, and thus are macroscopically ductile. This high magnification view shows multiple grain-scale faults, beautifully revealed by offset of original twins. In many but not all cases the grain-scale faults are developed along cleavage planes. (CF39)

		Experimentally deformed feldspar aggregates
		Figure caption

	Experimentally deformed feldspar aggregates	Starting material / cataclastic flow / regime 1


42		BA shortened 31% at 300°C, 10-5/sec, and 800 MPa; macroscopically ductile cataclastic flow. BA shortened 31% at 300°C, 10-5/sec, 800 MPa. At these conditions there is no dislocation glide or mechanical twinning; the samples deform by distributed cracking, including multiple grain-scale faulting, and thus are macroscopically ductile. This high magnification view shows multiple grain-scale faults, beautifully revealed by offset of original twins. In many but not all cases the grain-scale faults are developed along cleavage planes. (CF39)