Hand Sample Missing
Thin Section Missing

Foid-Bearing Diorite

IUGS Definition ( QAPF Chart )

Foid-Bearing Diorite: “A collective term for diorites containing small amounts of feldspathoids (less than 10% of the felsic minerals).”
Photos
Chemistry
Typical Minerals
  • intermediate plagioclase: andesine or calcic oligoclase
  • feldspathoids
  • pyroxene: usually augite, but also diopside and orthopyroxene
  • accessory minerals: apatite, sphene, ilmenite, zircon