Glaucophane Granofels

Granofels isa name for a massive granoblastic metamorphic rock, consisting of equant grains of quartz and feldspar, hence lacking a foliation. The term Granofels was introduced by Goldsmith (1959) as a term to describe rocks in which schistosity was absent or virtually absent. Previously, the term granulite had been used but as it also had grade and lithological connotations it was generally considered unsuitable.

Minor mafic minerals consist of pyroxene and garnet. According to the SCMR scheme if the schistosity in a metamorphic rock is well developed, the rock has a schistose structure and is termed a schist. If it is poorly developed, the rock has a gneissose structure and is termed a gneiss, and if schistosity is effectively absent the rock has a granofelsic structure and is termed a granofels.

Bibliography

• David Shelley (1983): Igneous and metamorphic rocks under the microscope. Campman & Hall editori.
• E. WM. Heinrich (1956): Microscopic Petrografy. Mcgraw-hill book company,inc
• Anthony R. Phillpotts & Jay J. Ague: Principles of igneous and metamorphic petrology. Cambridge editore.
• Passchier, Cees W., Trouw, Rudolph A. J: Microtectonics (2005)

Photo
Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. XPL image, 2x (Field of view = 7mm)
Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. XPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)
Glaucophane and Stilpnomelane crystals in a Granofels. XPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 10x (Field of view = 2mm)
Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 10x (Field of view = 2mm)	Glaucophane and Stilpnomelane crystals in a Granofels. XPL image, 10x (Field of view = 2mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 10x (Field of view = 2mm)
Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)
Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)	Glaucophane and Stilpnomelane crystals in a Granofels. PPL image, 2x (Field of view = 7mm)