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Continental growth by accretion: A tectonostratigraphic terrane analysis of the evolution of the western and central Baltic Shield, 2.50 to 1.75 Ga

1991; Geological Society of America; Volume: 103; Issue: 4 Linguagem: Inglês

10.1130/0016-7606(1991)103 2.3.co;2

1943-2674

Adrian F. Park,

High-pressure geophysics and materials

Research Article| April 01, 1991 Continental growth by accretion: A tectonostratigraphic terrane analysis of the evolution of the western and central Baltic Shield, 2.50 to 1.75 Ga ADRIAN F. PARK ADRIAN F. PARK 1Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada E3B 5A3 Search for other works by this author on: GSW Google Scholar Author and Article Information ADRIAN F. PARK 1Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada E3B 5A3 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1991) 103 (4): 522–537. https://doi.org/10.1130/0016-7606(1991)103 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 ADRIAN F. PARK; Continental growth by accretion: A tectonostratigraphic terrane analysis of the evolution of the western and central Baltic Shield, 2.50 to 1.75 Ga. GSA Bulletin 1991;; 103 (4): 522–537. doi: https://doi.org/10.1130/0016-7606(1991)103 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 Tectonostratigraphic terrane analysis of the western and central Baltic Shield defines a framework for continental growth through the period 2.50-1.75 Ga. Eight discrete terranes can be defined in this part of the Svecokarelian orogen: the older cratonic Kuhmo and Iisalmi terranes, the hybrid Lapland and Savo province allochthonous terranes, the juvenile island-arc-like Skellefte-Savonlinna and south Finland-central Sweden terranes, the back-arc or arc-like Outokumpu nappe, and the ophiolitic (oceanic?) Jormua nappe. Stitching events can also be recognized. These include the ca. 1.88-1.87 Ga Svionian magmatic arc, the ca. 2.44 Go Koillismaa intrusions, the Kalevian flysch basin, and the Bothnian basin. Constraining the age of these stitching events permits the construction of an accretion history in which the "Svecokarelian orogeny" can be resolved as a number of accretion events, deformation episodes related to accretion or magmato-tectonic episodes. These events, defined here, include the pre-2.44 Go Pohjolan accretion of the component parts of the Lapland hybrid terrane, the ca. 1.95 Ga Kyllikian accretion of the Karelian collage, the ca. 1.90 Ga Karelian orogeny marked by the development of the Savo thrust belt in response to the accretion of the Skellefte-Savonlinna terrane to the Karelian collage, and the ca. 1.88-1.87 Ga Svionian magmatic arc. The whole Svecokarelian collage had assembled by ca. 1.85 Ga, an amalgamation succeeded and stitched by a diverse collection of igneous and thermal events through the period 1.85-1.75 Ga. 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.