Metamorphic Petrology and Geochemistry Across the Grenville Province Southern Province Boundary, Dill Township, Sudbury

Abstract

<p>The geology and geochemistry of an area in Dill township, Sudbury, Ontario are studied in detail. Emphasis is placed on the nature of the boundary between the two provinces and the geochemistry of a sequence of pelitic schists in the Grenville province. </p> <p>The boundary appears to be marked by a mylonite zone separating pelitic schists containing andalusite-staurolite assemblages from kyanitesillimanite-staurolite ones.</p> <p>The pelitic schists in the Grenville province show a steep increase in temperature and pressure extending from the lower almandine amphibolite to the lower granulite facies. Electron microprobe, spectrographic and wet chemical analyses were performed on kyanite , sillimanite, biolite, muscovite and garnet and indicated many systematic changes of elemental distribution coefficients with changing metamorphic grade.</p>