Figure 43

Experimentally deformed feldspar aggregates

Figure caption

Experimentally deformed feldspar aggregates

Starting material / cataclastic flow / regime 1

43

BA shortened 23% at 350°C, 10-5/sec, and 800 MPa; dextral shear by cataclastic flow.

BA shortened 23% at 350°C, 10-5/sec, 800 MPa. This view shows a corner of a sample where there has been overall dextral shear around the piston edge, and illustrates how multiple grain-scale faulting is able to accomplish macroscopically ductile deformation. TEM shows that the undulatory extinction visible in some grains is due to arrays of submicroscopic cracks; the deformation involved no dislocation glide. (CF12)

		Experimentally deformed feldspar aggregates
		Figure caption

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


43		BA shortened 23% at 350°C, 10-5/sec, and 800 MPa; dextral shear by cataclastic flow. BA shortened 23% at 350°C, 10-5/sec, 800 MPa. This view shows a corner of a sample where there has been overall dextral shear around the piston edge, and illustrates how multiple grain-scale faulting is able to accomplish macroscopically ductile deformation. TEM shows that the undulatory extinction visible in some grains is due to arrays of submicroscopic cracks; the deformation involved no dislocation glide. (CF12)