A small plug of basaltic-andesite has fused the granite into which it is intruded in a zone adjacent to the contact. The glass progressively decreases in amount away from the contact, and the analyses of two samples of this glass represent two points on a disequilibrium fusion curve. There is no evidence of metasomatism up to the stage where over half the granite has been fused.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.