Eclogite facies

Chemical Process (Solid-phase growth) - High-P metamorphic facies series

Index Minerals

Omphacite, Pyrope

Required Geological Setting

Accretionary complexes + High-P metamorphic rocks

Occurrence

Metamorphic rocks formed by regional metamorphism in the following condition: more than 500 degree and more than 1.2 GPa (deeper than 40 km depth). A metamorphic facies formed in subduction zones. Eclogite facies metamorphic rocks are in Franciscan-type high-P metamorphic rocks.

Change of mineral assemblages

[ Extinct ] Epidote, Clinopyroxene
[ Appear ] Pyrope, Omphacite

Mineral Assemblages

[ Felsic Rocks ] Quartz, Phengite, Jadeite/Omphacite, Pyrope
[ Mafic Rocks ] Omphacite, Pyrope, (Kyanite, Hornblende, Zoisite)
[ Ultramafic Rocks ]
[ Mudstone ] Phengite, Pyrope, Kyanite, Quartz, (Talc, Jadeite)
[ Laterite ] Phengite, Pyrope, Kyanite, Chloritoid, Quartz
[ Bedded Mn ]
[ Carbonate Rocks ] Aragonite, Dolomite, Diopside