Ho, VL, Dorrell, RM orcid.org/0000-0003-4257-7273, Keevil, GM et al. (2 more authors) (2018) Pulse propagation in turbidity currents. Sedimentology, 65 (2). pp. 620-637. ISSN 0037-0746
Abstract
Submarine turbidity currents are a key mechanism in the transportation of clastic sediments to deep seas. Such currents may initiate with a complex longitudinal flow structure comprising flow pulses (for example, by being sourced from retrogressive sea floor slope failures) or acquire such structure during run‐out (for example, following flow combination downstream of confluences). A key question is how far along channel pathway complex flow structure is preserved within turbidity currents as they run out and thus if flow initiation mechanism and proximity to source may be inferred from the vertical structure of their deposits. To address this question, physical modelling of saline flows has been conducted to investigate the dynamics of single‐pulsed versus multi‐pulsed density driven currents. The data suggest that, under most circumstances, individual pulses within a multi‐pulsed flow must merge. Therefore, initiation signatures will only be preserved in deposits upstream of the merging point and may be distorted approaching it; downstream of the merging point, all initiation signals will be lost. This new understanding of merging phenomenon within multi‐pulsed gravity currents broadens our ability to interpret multi‐pulsed turbidites.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Authors. Sedimentology © 2017 International Association of Sedimentologists. This is the peer reviewed version of the following article: Ho, V. L., Dorrell, R. M., Keevil, G. M., Burns, A. D. and McCaffrey, W. D. (2017), Pulse propagation in turbidity currents. Sedimentology., which has been published in final form at https://doi.org/10.1111/sed.12397. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Multi-pulsed turbidity currents; pulsed turbidites; seismo-turbidites; signal shredding; stacked turbidites; turbidity currents |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Jun 2017 09:54 |
Last Modified: | 26 Jun 2018 00:38 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1111/sed.12397 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:118146 |