Suture-zone geometry along an irregular Paleoproterozoic margin: The Superior boundary zone, Manitoba, Canada

Abstract

Research Article| August 01, 2002 Suture-zone geometry along an irregular Paleoproterozoic margin: The Superior boundary zone, Manitoba, Canada D.J. White; D.J. White 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar S.B. Lucas; S.B. Lucas 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar W. Bleeker; W. Bleeker 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar Z. Hajnal; Z. Hajnal 2University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0, Canada Search for other works by this author on: GSW Google Scholar J.F. Lewry; J.F. Lewry 3University of Regina, Regina, Saskatchewan S4P 4V4, Canada Search for other works by this author on: GSW Google Scholar H.V. Zwanzig H.V. Zwanzig 4Manitoba Industry, Trade and Mines, 1395 Ellice Avenue, Winnipeg, Manitoba R3G 3P2, Canada Search for other works by this author on: GSW Google Scholar Geology (2002) 30 (8): 735–738. https://doi.org/10.1130/0091-7613(2002)030<0735:SZGAAI>2.0.CO;2 Article history received: 27 Dec 2001 rev-recd: 18 Apr 2002 accepted: 19 Apr 2002 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation D.J. White, S.B. Lucas, W. Bleeker, Z. Hajnal, J.F. Lewry, H.V. Zwanzig; Suture-zone geometry along an irregular Paleoproterozoic margin: The Superior boundary zone, Manitoba, Canada. Geology 2002;; 30 (8): 735–738. doi: https://doi.org/10.1130/0091-7613(2002)030<0735:SZGAAI>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 Lithoprobe acquired a 190-km-long deep seismic reflection profile across the Superior boundary zone at the eastern margin of the Paleoproterozoic Trans-Hudson orogen. The profile is located ∼250 km south of a major promontory along the ancient margin of the Superior craton and complements earlier profiles closer to the promontory. The new data image the remnants of a craton-verging thrust belt, younger than 1864 Ma, within the Superior boundary zone extending to a maximum depth of 15 km above a shallowly west dipping basal décollement. Across the surface suture zone, a dip reversal to east-dipping reflections occurs within the adjacent Reindeer zone, where a crustal-scale imbricate stack is imaged. Reindeer zone lower crust and upper mantle extend eastward beneath the Superior craton margin for 40–100 km. Preservation of a foreland thrust belt within the Superior boundary zone is explained as a result of reduced collisional convergence and subsequent exhumation within a reentrant flanking the Thompson promontory. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.