Abstract

Olivines from nearly 60 representative teschenite specimens from the Black Jack differentiated sill, near Gunnedah, northwest of Sydney, New South Wales, have been studied and data on their optical properties, derived compositions, zoning, and textural variation are presented. The composition range is Fa 21 - Fa 60 , crystals becoming increasingly fayalitic with progressive differentiation.

You do not currently have access to this article.