Origin of contrasting Devonian supradetachment basin types in the Scandinavian Caledonides

Abstract

Research Article| June 01, 2012 Origin of contrasting Devonian supradetachment basin types in the Scandinavian Caledonides Vegard V. Vetti; Vegard V. Vetti Department of Earth Science, University of Bergen, Postboks 7803, 5020 Bergen, Norway Search for other works by this author on: GSW Google Scholar Haakon Fossen Haakon Fossen Department of Earth Science, University of Bergen, Postboks 7803, 5020 Bergen, Norway Search for other works by this author on: GSW Google Scholar Author and Article Information Vegard V. Vetti Department of Earth Science, University of Bergen, Postboks 7803, 5020 Bergen, Norway Haakon Fossen Department of Earth Science, University of Bergen, Postboks 7803, 5020 Bergen, Norway Publisher: Geological Society of America Received: 30 May 2011 Revision Received: 13 Jan 2012 Accepted: 25 Jan 2012 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (6): 571–574. https://doi.org/10.1130/G32512.1 Article history Received: 30 May 2011 Revision Received: 13 Jan 2012 Accepted: 25 Jan 2012 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Vegard V. Vetti, Haakon Fossen; Origin of contrasting Devonian supradetachment basin types in the Scandinavian Caledonides. Geology 2012;; 40 (6): 571–574. doi: https://doi.org/10.1130/G32512.1 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 Supradetachment basins that formed during the Devonian extensional collapse of the Scandinavian Caledonides have been explained as hanging-wall basins formed along the listric breakaway zone of a major detachment fault system. This model involves significant rotation of bedding as the detachment flattens to an approximately horizontal orientation, and explains the large stratigraphic thicknesses of east-dipping layers overlying in tectonic contact the top-to-the-west Nordfjord-Sogn detachment zone (NSDZ). However, it fails to explain one of the basins, the Håsteinen basin, where east-dipping Devonian strata rest unconformably on a metamorphic substrate that forms part of the upper plate of the detachment system. Based on detailed field mapping, we present a model where the Håsteinen forms as a ramp basin that develops on the upper plate above a major west-facing ramp in the NSDZ. We test both of these models by forward modeling using 2DMove (two-dimensional kinematic modeling software). The results show how two different types of supradetachment basins can coexist in a subhorizontal detachment zone in an area that underwent many tens of kilometers of lateral crustal extension. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.