The Sudbury Igneous Complex: A Differentiated Impact Melt Sheet Therriault, A. M. ; Fowler, A. D. ; Grieve, R. A. F. Abstract Publication: Economic Geology Pub Date: November 2002 DOI: 10.2113/gsecongeo.97.7.1521 Bibcode: 2002EcGeo..97.1521T