Relic clinopyroxenes and metamorphism of the Motton Spilite of the Leven Hills district, Tasmania

Abstract

Electron probe analyses of the relic clinopyroxenes and bulk chemicalcompositions of the Motton Spilite greenstones both suggest that they have been derived from basaltic rocks similar to ocean floor tholeiites. The greenstones are considered to have been affected by low-grade metamorphism whose physical conditions corresponded to those of the lower grade part of the glaucophanitic facies.