Figure 51

Naturally deformed feldspar aggregates

Figure caption

Naturally deformed feldspar rocks

regime 1 / regime 2 low deformation / regime 2 moderate-high deformation

51

Anorthosite moderately deformed and substantially recrystallized at ~700°C and 900 MPa; regime 2 dislocation creep.

Moderate strain anorthosite showing a porphyroclast with rectangular subgrains of a size similar to that of recrystallized matrix grains. The core-mantle structures and subgrain formation indicate that progressive subgrain rotation is the dominant mechanism of dynamic recrystallization. Some twin boundaries are recrystallized implying that twinning preceded dynamic recrystallization.

		Naturally deformed feldspar aggregates
		Figure caption

	Naturally deformed feldspar rocks	regime 1 / regime 2 low deformation / regime 2 moderate-high deformation


51		Anorthosite moderately deformed and substantially recrystallized at ~700°C and 900 MPa; regime 2 dislocation creep. Moderate strain anorthosite showing a porphyroclast with rectangular subgrains of a size similar to that of recrystallized matrix grains. The core-mantle structures and subgrain formation indicate that progressive subgrain rotation is the dominant mechanism of dynamic recrystallization. Some twin boundaries are recrystallized implying that twinning preceded dynamic recrystallization.