Accretion tectonism in the Proterozoic Svecokarelides of the Baltic Shield

Abstract

Research Article| October 01, 1985 Accretion tectonism in the Proterozoic Svecokarelides of the Baltic Shield Adrian F. Park Adrian F. Park 1Department of Geology, University of Glasgow, Glasgow G12 8QQ, Scotland Search for other works by this author on: GSW Google Scholar Geology (1985) 13 (10): 725–729. https://doi.org/10.1130/0091-7613(1985)13<725:ATITPS>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Adrian F. Park; Accretion tectonism in the Proterozoic Svecokarelides of the Baltic Shield. Geology 1985;; 13 (10): 725–729. doi: https://doi.org/10.1130/0091-7613(1985)13<725:ATITPS>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 The duality of early middle Proterozoic terranes in the Baltic Shield reflects fundamental differences in history between coeval mobile belts and the manner of their interaction. The Karelides formed on a continent-ocean transcurrent margin in which offsets developed as arcs and back-arc basins on stretched continental crust. At least one back-arc basin was obducted onto the continental margin, preserved as an allochthonous terrane in the Karelian nappe pile. Remnant arc fragments form accreted exotic terrane in Pohjanmaa. The Svecofennides developed as a succession of island arcs, while the site of subduction moved south, and successive extinct arcs were accreted onto the Archean craton. Arc terrane impingement affected deformation style in the Karelides, which changed from one of major horizontal translation to one dominated by major dextral wrench faults. Analogies can be drawn with the Phanerozoic evolution of the northeast Pacific 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.