Minto block, Superior province: Missing link in deciphering assembly of the craton at 2.7 Ga

Research Article| September 01, 1994 Minto block, Superior province: Missing link in deciphering assembly of the craton at 2.7 Ga J. A. Percival; J. A. Percival 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar R. A. Stern; R. A. Stern 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar T. Skulski; T. Skulski 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar K. D. Card; K. D. Card 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar J. K. Mortensen; J. K. Mortensen 2Department of Geological Sciences, University of British Columbia, Vancouver,British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar N. J. Bégin N. J. Bégin 3Department of Geology and Geophysics, University of Calgary, Calgary, Alberta T2N 1N4, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information J. A. Percival 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada R. A. Stern 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada T. Skulski 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada K. D. Card 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada J. K. Mortensen 2Department of Geological Sciences, University of British Columbia, Vancouver,British Columbia V6T 1Z4, Canada N. J. Bégin 3Department of Geology and Geophysics, University of Calgary, Calgary, Alberta T2N 1N4, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1994) 22 (9): 839–842. https://doi.org/10.1130/0091-7613(1994)022<0839:MBSPML>2.3.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 J. A. Percival, R. A. Stern, T. Skulski, K. D. Card, J. K. Mortensen, N. J. Bégin; Minto block, Superior province: Missing link in deciphering assembly of the craton at 2.7 Ga. Geology 1994;; 22 (9): 839–842. doi: https://doi.org/10.1130/0091-7613(1994)022<0839:MBSPML>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 SocietyGeology Search Advanced Search Abstract Plate-tectonic models of the Superior province are rooted in the granite-greenstone and metasedimentary belts of the southern part of the craton. North-striking domains of the Minto block in the northeastern part of the province evolved at similar times, in 3.1-2.8, 2.725, and 2.69 Ga events, requiring expansion of models of late Archean assembly to accommodate Minto geology. Western and eastern protocratons (∼3.1-2.8 Ga) rifted at ∼2.79 Ga to produce an ocean basin that was mostly consumed by subduction at 2.725 Ga. The Leaf River plutonic suite of cale-alkalic hornblende + biotite ± orthopyroxene ±clinopyroxene granodiorite represents magmatic arcs built on the protocratons, whereas the intervening Goudalie domain—containing fault-bounded fragments of rifted continental crust, rift volcanics, primitive oceanic crust, 2724 Ma island-arc rocks, and a <2718 Ma back-arc assemblage—marks the suture. Terminal collision at ∼2.7 Ga led to thickening and crustally derived granitoid magmatism. The southern Superior province also experienced vigorous activity between 2.725 and 2.69 Ga as island arcs, oceanic plateaus, continental fragments, and accretionary prisms were amalgamated progressively from north to south in a regime of dextral transpression then stitched by granites. A northern proto-Superior craton had continental magmatic arcs built on its eastern and southern flanks in response to west-northwest-directed subduction; orthogonal convergence in the east produced wide plutonic arcs, in contrast to terrane-accretion tectonics in the more oblique regime along the southern margin. 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.