Appinite
Type of igneous rock / From Wikipedia, the free encyclopedia
Appinite is an amphibole-rich plutonic rock of high geochemical variability. Appinites are therefore regarded as a rock series comprising hornblendites, meladiorites, diorites, but also granodiorites and granites. Appinites have formed from magmas very rich in water. They occur in very different geological environments. The ultimate source region of these peculiar rocks is the upper mantle, which was altered metasomatically and geochemically before melting.