This is a classic look of magma mixing, where we find a large plagioclase feldspar crystal apparently inter grown with a highly reacted amphibole crystal. The amphibole is clearly not happy (not in ...

The feldspar ... plagioclase and potassium.Plagioclase is any member of the series of abundant feldspar minerals occurring as light-colored, glassy, transparent to translucent, brittle crystals.

This study performed an investigation of magmatic growth history of the K-feldspar megacrysts and plagioclase crystals in the Halifax Pluton, a Late Devonian age granite that intruded into the Meguma ...