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Protogine

A rock subtype
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A term used in the Alps for a metagranitic rock with a gneissose structure containing greenschist facies minerals such as sericite, chlorite, epidote, and garnet, and shows evidence of a composite origin or of crystallization (or partial recrystallization) under stress after consolidation. Also spelled protogene. The term, dating from 1806, is obsolete.

Ref: AGI


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Unique IdentifiersHide

Mindat ID:
50741
Long-form identifier:
mindat:1:1:50741:1

Classification of ProtogineHide

Mineralogy of ProtogineHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
ChloriteA name commonly used for undifferentiated members of the chlorite group.
Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
MicaA petrological term for Mica Group.
SpessartineMn2+3Al2(SiO4)3

Synonyms of ProtogineHide

Internet Links for ProtogineHide

References for ProtogineHide

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