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Deposits of flows transitional between turbidity current and debris flow

2009; Geological Society of America; Volume: 37; Issue: 11 Linguagem: Inglês

10.1130/g30059a.1

1943-2682

E. J. Sumner, Peter J. Talling, Lawrence Amy,

Geology and Paleoclimatology Research

Research Article| November 01, 2009 Deposits of flows transitional between turbidity current and debris flow Esther J. Sumner; Esther J. Sumner 1Department of Earth Science, University of Bristol, Queen's Road, Bristol BS8 1RJ, UK *Current address: National Oceanography Centre, University of Southampton, Waterfront Campus, European Way, Southampton SO14 3ZH, UK. E-mails: Esther.Sumner@noc.soton.ac.uk; peter.talling@noc.soton.ac.uk. Search for other works by this author on: GSW Google Scholar Peter J. Talling; Peter J. Talling 1Department of Earth Science, University of Bristol, Queen's Road, Bristol BS8 1RJ, UK *Current address: National Oceanography Centre, University of Southampton, Waterfront Campus, European Way, Southampton SO14 3ZH, UK. E-mails: Esther.Sumner@noc.soton.ac.uk; peter.talling@noc.soton.ac.uk. Search for other works by this author on: GSW Google Scholar Lawrence A. Amy Lawrence A. Amy 1Department of Earth Science, University of Bristol, Queen's Road, Bristol BS8 1RJ, UK †Current address: Saudi Aramco, Dharan 31311, Saudi Arabia Search for other works by this author on: GSW Google Scholar Author and Article Information Esther J. Sumner *Current address: National Oceanography Centre, University of Southampton, Waterfront Campus, European Way, Southampton SO14 3ZH, UK. E-mails: Esther.Sumner@noc.soton.ac.uk; peter.talling@noc.soton.ac.uk. 1Department of Earth Science, University of Bristol, Queen's Road, Bristol BS8 1RJ, UK Peter J. Talling *Current address: National Oceanography Centre, University of Southampton, Waterfront Campus, European Way, Southampton SO14 3ZH, UK. E-mails: Esther.Sumner@noc.soton.ac.uk; peter.talling@noc.soton.ac.uk. 1Department of Earth Science, University of Bristol, Queen's Road, Bristol BS8 1RJ, UK Lawrence A. Amy †Current address: Saudi Aramco, Dharan 31311, Saudi Arabia 1Department of Earth Science, University of Bristol, Queen's Road, Bristol BS8 1RJ, UK Publisher: Geological Society of America Received: 21 Jan 2009 Accepted: 15 Jun 2009 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (11): 991–994. https://doi.org/10.1130/G30059A.1 Article history Received: 21 Jan 2009 Accepted: 15 Jun 2009 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Esther J. Sumner, Peter J. Talling, Lawrence A. Amy; Deposits of flows transitional between turbidity current and debris flow. Geology 2009;; 37 (11): 991–994. doi: https://doi.org/10.1130/G30059A.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 The relationship between submarine sediment gravity flows and the character of their deposits is poorly understood. Annular flume experiments were used to investigate the depositional dynamics and deposits of waning sediment-laden flows. Decelerating fast (>3 m/s) flows with fixed sand content (10 vol%) and variable mud content (0–17 vol%) resulted in only four deposit types. Clean sand with a mud cap that resembled a turbidity current deposit (turbidite) formed if the flow was turbulent when deposition began, or if the muddy fluid had insufficient strength to suspend the sand. The clean sand could contain structures if mud content was low ( 300 s. Ungraded muddy sand with a mud cap that resembled a debris-flow deposit (debrite) formed if the flow became laminar before sand could deposit. Clean sand overlain by ungraded muddy sand and a mud cap formed either from a transitional flow or by late-stage settling of sand from a muddy suspension. These deposits resemble enigmatic submarine flow deposits called linked debrite-turbidites. The experiments provide a basis for inferring flow type from deposit character for submarine sediment-laden flows. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.