Metamorphic Facies

Question 1

Zeolite

Answer 1

Laumontite and heulandite etc. (in place of other Ca-AI silicates such as prehnite, pumpellyite, and epidote)

Question 2

Greenschist

Answer 2

Actinolite-albite-epidote-chlorite (an epidote group mineral is the diagnostic Ca-Al silicate rather than prehnite or pumpellyite)

Question 3

Amphibolite

Answer 3

Hornblende-plagioclase (plagioclase more calcic than An17)

Question 4

Sanidinite

Answer 4

Distinguished from the pyroxene hornfels facies by the occurrence of especially high-temperature varieties and polymorphs of minerals (e.g. pigeonite, K-rich labradorite)

Question 5

Glaucophane-schist or Blueschist

Answer 5

Glaucophane-epidote-(garnet), glaucophane—lawsonite, glaucophane-lawsonite-jadeite

Question 6

Eclogite

Answer 6

Omphacite-garnet-quartz (no plagioclase, olivine stable with garnet)

Question 7

Granulite

Answer 7

Clinopyroxene-orthopyroxene-plagioclase (olivine not stable with plagioclase or with garnet)