Northeast extension of Proterozoic terranes of mid-continental North America

Abstract

Research Article| May 01, 1988 Northeast extension of Proterozoic terranes of mid-continental North America O. VAN BREEMEN; O. VAN BREEMEN 1Lithosphere and Canadian Shield Division, Geological Survey of Canada, 601 Booth Street, Ottawa,Canada K1A 0E8 Search for other works by this author on: GSW Google Scholar A. DAVIDSON A. DAVIDSON 1Lithosphere and Canadian Shield Division, Geological Survey of Canada, 601 Booth Street, Ottawa,Canada K1A 0E8 Search for other works by this author on: GSW Google Scholar Author and Article Information O. VAN BREEMEN 1Lithosphere and Canadian Shield Division, Geological Survey of Canada, 601 Booth Street, Ottawa,Canada K1A 0E8 A. DAVIDSON 1Lithosphere and Canadian Shield Division, Geological Survey of Canada, 601 Booth Street, Ottawa,Canada K1A 0E8 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1988) 100 (5): 630–638. https://doi.org/10.1130/0016-7606(1988)100<0630:NEOPTO>2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation O. VAN BREEMEN, A. DAVIDSON; Northeast extension of Proterozoic terranes of mid-continental North America. GSA Bulletin 1988;; 100 (5): 630–638. doi: https://doi.org/10.1130/0016-7606(1988)100<0630:NEOPTO>2.3.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 SocietyGSA Bulletin Search Advanced Search Abstract Granite and rhyolite ranging in age from ∼1.8-1.34 m.y. are known to underlie much of mid-continental North America west of the Phanerozoic Michigan Basin. U-Pb zircon ages of similar rocks exposed adjacent to the Grenville Province in Ontario suggest that the mid-continental terranes extend northeast beneath and beyond the Michigan Basin. Prevalence of similar U-Pb zircon ages obtained from metaplutonic rocks southeast of the Grenville Front and affected by the 1.2-1.0 Ga Grenvillian Orogeny prompts the interpretation that deformed equivalents of the mid-continental Proterozoic rocks form the bulk of the crust in the Central Gneiss Belt of the Grenville Province east of Lake Huron. Farther east, pre-1.34 Ga terranes appear to be tectonically occluded by 1.28-1.22 Ga volcanic, sedimentary, and plutonic rocks of the Central Metasedimentary Belt, themselves deformed, metamorphosed, and intruded by younger Grenvillian plutons. 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.