Figure 24

Naturally deformed feldspar aggregates

Figure caption

Naturally deformed feldspar rocks

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

24

Nucleation of new grains inside fractured plagioclase porphyroclast.

Detail of a plagioclase porphyroclast deformed under lower- to mid-greenschist facies P,T-conditions; small new grains of a different chemical composition have nucleated (neo-mineralization). The nucleation of the new grains occurs preferentially along fractures in the host grain. Occasionally, isolated new grains appear to form inside the host grains. Fractures are usually marked by trails of fluid or solid inclusions; high magnification is required to observe such fractures. Sample is from the Corvatsch mylonite zone, Switzerland.

		Naturally deformed feldspar aggregates
		Figure caption

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


24		Nucleation of new grains inside fractured plagioclase porphyroclast. Detail of a plagioclase porphyroclast deformed under lower- to mid-greenschist facies P,T-conditions; small new grains of a different chemical composition have nucleated (neo-mineralization). The nucleation of the new grains occurs preferentially along fractures in the host grain. Occasionally, isolated new grains appear to form inside the host grains. Fractures are usually marked by trails of fluid or solid inclusions; high magnification is required to observe such fractures. Sample is from the Corvatsch mylonite zone, Switzerland.