Formation of rnetamorphic aureoles beneath ophiolites— Evidence from the St. Anthony Complex, Newfoundland

Research Article| March 01, 1980 Formation of metamorphic aureoles beneath ophiolites— Evidence from the St. Anthony Complex, Newfoundland R. A. Jamieson R. A. Jamieson 1Department of Geology, Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information R. A. Jamieson 1Department of Geology, Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1980) 8 (3): 150–154. https://doi.org/10.1130/0091-7613(1980)8<150:FORABO>2.0.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation R. A. Jamieson; Formation of metamorphic aureoles beneath ophiolites— Evidence from the St. Anthony Complex, Newfoundland. Geology 1980;; 8 (3): 150–154. doi: https://doi.org/10.1130/0091-7613(1980)8<150:FORABO>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A model for the formation of rnetamorphic aureoles beneath ophiolite complexes is proposed on the basis of evidence from the St. Anthony Complex of northwestern Newfoundland. This complex consists of peridotite underlain by high-grade amphibolites, epidote amphibolites, greenschists, and undeformed volcanic rocks. A rnetamorphic profile through the St. Anthony Complex shows a steep thermal gradient, a change in metamorphic pressure from 7–10 kb near the peridotite contact to 2 kb at the base of the aureole, and a variation in protoliths from gabbros through tholeiitic and alkaline basalts to sedimentary rocks. This evidence suggests that the aureole formed by the accretion of oceanic rocks to the base of an overriding ophiolite sheet during its displacement from the oceanic lithosphere. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.