From the source area to the deposit: Collapse, fragmentation, and propagation of the Frank Slide

Abstract

Research Article| January 01, 2016 From the source area to the deposit: Collapse, fragmentation, and propagation of the Frank Slide Marie Charrière; Marie Charrière 1Former Institute of Geomatics and Risk Analysis (IGAR), University of Lausanne, CH-1015 Lausanne, Switzerland †Current address: Water Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands; [e-mail]. Search for other works by this author on: GSW Google Scholar Florian Humair; Florian Humair 2Institute of Earth Sciences (ISTE), University of Lausanne, CH-1015 Lausanne, Switzerland Search for other works by this author on: GSW Google Scholar Corey Froese; Corey Froese 3Alberta Energy Regulator, Calgary, Alberta 23 T2P 0R4, Canada Search for other works by this author on: GSW Google Scholar Michel Jaboyedoff; Michel Jaboyedoff 2Institute of Earth Sciences (ISTE), University of Lausanne, CH-1015 Lausanne, Switzerland Search for other works by this author on: GSW Google Scholar Andrea Pedrazzini; Andrea Pedrazzini 1Former Institute of Geomatics and Risk Analysis (IGAR), University of Lausanne, CH-1015 Lausanne, Switzerland §Current address: Office of Environment, Republic and Canton of Jura, Ch. Du Bel'Oiseau 12, Case Postale 69, 2882 Saint-Ursanne, Switzerland. Search for other works by this author on: GSW Google Scholar Céline Longchamp Céline Longchamp 2Institute of Earth Sciences (ISTE), University of Lausanne, CH-1015 Lausanne, Switzerland Search for other works by this author on: GSW Google Scholar Author and Article Information Marie Charrière †Current address: Water Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands; [e-mail]. 1Former Institute of Geomatics and Risk Analysis (IGAR), University of Lausanne, CH-1015 Lausanne, Switzerland Florian Humair 2Institute of Earth Sciences (ISTE), University of Lausanne, CH-1015 Lausanne, Switzerland Corey Froese 3Alberta Energy Regulator, Calgary, Alberta 23 T2P 0R4, Canada Michel Jaboyedoff 2Institute of Earth Sciences (ISTE), University of Lausanne, CH-1015 Lausanne, Switzerland Andrea Pedrazzini §Current address: Office of Environment, Republic and Canton of Jura, Ch. Du Bel'Oiseau 12, Case Postale 69, 2882 Saint-Ursanne, Switzerland. 1Former Institute of Geomatics and Risk Analysis (IGAR), University of Lausanne, CH-1015 Lausanne, Switzerland Céline Longchamp 2Institute of Earth Sciences (ISTE), University of Lausanne, CH-1015 Lausanne, Switzerland Publisher: Geological Society of America Received: 28 Nov 2014 Revision Received: 08 Jun 2015 Accepted: 20 Jul 2015 First Online: 09 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2015 Geological Society of America GSA Bulletin (2016) 128 (1-2): 332–351. https://doi.org/10.1130/B31243.1 Article history Received: 28 Nov 2014 Revision Received: 08 Jun 2015 Accepted: 20 Jul 2015 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Marie Charrière, Florian Humair, Corey Froese, Michel Jaboyedoff, Andrea Pedrazzini, Céline Longchamp; From the source area to the deposit: Collapse, fragmentation, and propagation of the Frank Slide. GSA Bulletin 2016;; 128 (1-2): 332–351. doi: https://doi.org/10.1130/B31243.1 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 SocietyGSA Bulletin Search Advanced Search Abstract The combination of structural data from the source area and descriptive data from the deposit's carapace, as well as remote sensing and statistical analysis, allows a better understanding of the collapse, fragmentation, and propagation processes of the Frank Slide rock avalanche. The in situ observed conservation of the stratigraphic sequence of the Turtle Mountain anticline's normal limb in the deposit is interpreted as the consequence of the collapse mode, involving simple shearing of the mass accompanied by a rotational movement, i.e., a "simple shear" parallel to the topography, and a breakage of the hinge, followed by overthrusting of the normal limb on the inverse limb. Coherence between the block size distributions of the source area and the deposit carapace is interpreted as a demonstration of the primary control of preexisting fracturing on the fragmentation processes. Remote-sensing indexes allow us to uncover a priori hidden morphological features preserved on the surface of the deposit, i.e., longitudinal and compressional features, as well as lobes. Their location on the carapace provides evidence of lateral heterogeneity in the propagation, highlighted by three different types of propagation behaviors. This comprehensive study not only provides elements that contribute to an understanding of the Frank Slide rock avalanche, but it also provides insight into essential parameters to take into account in further modeling of these types of phenomena. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.