Controls of Biotite Zone Mineral Chemistry in Archaean Meta-Sediments near Yellowknife, Northwest Territories, Canada

Abstract

Archaean meta-sediments near Yellowknife, Canada, exhibit a low-pressure facies series and broad metamorphic zonation round a central pluton. Meta-pelites and meta-greywackes from the biotite zone have been studied using analyses of 59 minerals and 14 rocks. Mineral compositions were controlled by both host-rock composition and metamorphic grade.