Date of Award
Master of Science
Geological and Environmental Sciences
Dr. John D. Grace
Dr. Ronald B. Chase
Dr. W. Thomas Straw
Masters Thesis-Open Access
The origin of the Sudbury Breccia surrounding the Sudbury Basin of Ontario, Canada has long been debated. The breccia has been described both as an igneous injection and as an abraded country rock formed by attrition in place.
A geochemical analysis of selected elements in matrix and clast samples from the breccia revealed distinct differences between the two sample groups. Matrix samples were lower in silicon and higher in heavy elements than the clasts. Matrix and clasts were comparable in light elements.
The results of the analysis favor an igneous process. Petrographic observations and structural evidence support this idea. The Sudbury Breccia is most likely related to the sublayer beneath the basin.
Prochaska, "A Geochemical Study of the Sudbury Breccia" (1981). Master's Theses. 1822.