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Submarine spreading : dynamics and development ; Submarine mass movements and their consequences

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Τίτλος: Submarine spreading : dynamics and development ; Submarine mass movements and their consequences
Συγγραφείς: Micallef, Aaron, Masson, Douglas G., Berndt, Christian, Stow, Dorrik A.V., 3rd International Symposium on Submarine Mass Movements and Their Consequences
Στοιχεία εκδότη: Kluwer Academic Publishers
Έτος έκδοσης: 2007
Συλλογή: University of Malta: OAR@UM / L-Università ta' Malta
Θεματικοί όροι: Sediments (Geology) -- Analysis, Geology, Structural -- Data processing, Submarines (Ships) -- Models
Περιγραφή: Spreading is a pervasive type of ground failure in subaerial environments, but its occurrence has hardly been documented in submarine settings. However, recent advances in seafloor imaging techniques show that repetitive extensional patterns of parallel ridges and troughs, oriented perpendicular to the direction of mass movement and typical of spreading, are widespread offshore. A spread develops via the failure of a surficial sediment unit into coherent blocks. These blocks are displaced downslope along a quasi-planar slip surface. Two modes of failure can be identified: retrogressive failure of the headwall, and slab failure and extension. Mechanical modelling indicates that loss of support and seismic loading are the main triggering mechanisms. The extent of displacement of the spreading sediment is controlled by gravitationally-induced stress, angle of internal friction of sediment, pore pressure escape and friction. The resulting block movement patterns entail an exponential increase of displacement and thinning of the failing sediment with distance downslope. A deeper insight into submarine spreading is important because of the widespread occurrence of ridge and trough morphology in numerous submarine slides, particularly in the vicinity of submarine infrastructures. ; peer-reviewed
Τύπος εγγράφου: book part
Γλώσσα: English
ISBN: 978-1-4020-6511-8
1-4020-6511-6
Relation: https://www.um.edu.mt/library/oar//handle/123456789/26729
Διαθεσιμότητα: https://www.um.edu.mt/library/oar//handle/123456789/26729
Rights: info:eu-repo/semantics/restrictedAccess ; The copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder
Αριθμός Καταχώρησης: edsbas.83FD0B5A
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  – Url: https://www.um.edu.mt/library/oar//handle/123456789/26729#
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  Data: Submarine spreading : dynamics and development ; Submarine mass movements and their consequences
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  Data: <searchLink fieldCode="AR" term="%22Micallef%2C+Aaron%22">Micallef, Aaron</searchLink><br /><searchLink fieldCode="AR" term="%22Masson%2C+Douglas+G%2E%22">Masson, Douglas G.</searchLink><br /><searchLink fieldCode="AR" term="%22Berndt%2C+Christian%22">Berndt, Christian</searchLink><br /><searchLink fieldCode="AR" term="%22Stow%2C+Dorrik+A%2EV%2E%22">Stow, Dorrik A.V.</searchLink><br /><searchLink fieldCode="AR" term="%223rd+International+Symposium+on+Submarine+Mass+Movements+and+Their+Consequences%22">3rd International Symposium on Submarine Mass Movements and Their Consequences</searchLink>
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  Data: Kluwer Academic Publishers
– Name: DatePubCY
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  Data: 2007
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  Data: University of Malta: OAR@UM / L-Università ta' Malta
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  Data: <searchLink fieldCode="DE" term="%22Sediments+%28Geology%29+--+Analysis%22">Sediments (Geology) -- Analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Geology%22">Geology</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+--+Data+processing%22">Structural -- Data processing</searchLink><br /><searchLink fieldCode="DE" term="%22Submarines+%28Ships%29+--+Models%22">Submarines (Ships) -- Models</searchLink>
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  Data: Spreading is a pervasive type of ground failure in subaerial environments, but its occurrence has hardly been documented in submarine settings. However, recent advances in seafloor imaging techniques show that repetitive extensional patterns of parallel ridges and troughs, oriented perpendicular to the direction of mass movement and typical of spreading, are widespread offshore. A spread develops via the failure of a surficial sediment unit into coherent blocks. These blocks are displaced downslope along a quasi-planar slip surface. Two modes of failure can be identified: retrogressive failure of the headwall, and slab failure and extension. Mechanical modelling indicates that loss of support and seismic loading are the main triggering mechanisms. The extent of displacement of the spreading sediment is controlled by gravitationally-induced stress, angle of internal friction of sediment, pore pressure escape and friction. The resulting block movement patterns entail an exponential increase of displacement and thinning of the failing sediment with distance downslope. A deeper insight into submarine spreading is important because of the widespread occurrence of ridge and trough morphology in numerous submarine slides, particularly in the vicinity of submarine infrastructures. ; peer-reviewed
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  Data: info:eu-repo/semantics/restrictedAccess ; The copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder
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      – Text: English
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      – SubjectFull: Geology
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      – SubjectFull: Structural -- Data processing
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      – SubjectFull: Submarines (Ships) -- Models
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      – TitleFull: Submarine spreading : dynamics and development ; Submarine mass movements and their consequences
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