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  • 1
    Online Resource
    Online Resource
    Subaqueous mass movements and their consequences : advances in process understanding, monitoring and hazard assessments (2020)
    London : The Geological Society
    Details Availability
    Keywords: Landslides ; Submarine geology ; Tsunami hazard zones ; Aufsatzsammlung ; Meeresboden ; Suspensionsströmung ; Submarine Gleitung ; Turbidit ; Rutschung ; Aufsatzsammlung ; Meeresgeologie ; Massenbewegung ; Tsunami ; Turbiditätsströmung ; Konturit ; Flysch
    Description / Table of Contents: Section A:Consequences and implications:Subaqueous mass movements in the context of observations of contemporary slope failure /Joshu J. Mountjoy, Aggeliki Georgiopoulou, Jason Chaytor, Michael A. Clare, Davide Gamboa and Jasper Moernaut --Revisiting the tsunamigenic volcanic flank collapse of Fogo Island in the Cape Verdes, offshore West Africa /Rachel Barrett, Elodie Lebas, Ricardo Ramalho, Ingo Klaucke, Steffen Kutterolf, Andreas Klügel, Katja Lindhorst, Felix Gross and Sebastian Krastel --The sedimentology and tsunamigenic potential of the Byron submarine landslide off New South Wales, Australia /Kendall C. Mollison, Hannah E. Power, Samantha L. Clarke, Alan T. Baxter, Emily M. Lane and Thomas C. T. Hubble --Effects of rotational submarine slump dynamics on tsunami genesis: new insight from idealized models and the 1929 Grand Banks event /T. Zengaffinen, F. Løvholt, G. K. Pedersen and C. B. Harbitz --A scenario-based assessment of the tsunami hazard in Palermo, northern Sicily, and the southern Tyrrhenian Sea /Jack Dignan, Aaron Micallef, Christof Mueller, Attilio Sulli, Elisabetta Zizzo and Daniele Spatola --A workflow for the rapid assessment of the landslide-tsunami hazard in peri-alpine lakes /Michael Strupler, Flavio S. Anselmetti, Michael Hilbe, Katrina Kremer and Stefan Wiemer --Towards a national-scale assessment of the subaqueous mass movement hazard in Canada /D. Gwyn Lintern, Jessica Rutherford, Philip R. Hill, Calvin Campbell and Alexandre Normandeau --Structural constraints on the subduction of mass-transport deposits in convergent margins /Jacob Geersen, Andrea Festa and Francesca Remitti --Evaluating the sealing potential of young and thin mass-transport deposits: Lake Villarrica, Chile /Jasper Moernaut, Gauvain Wiemer, Achim Kopf and Michael Strasser
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (639 Seiten) , Illustrationen, Karten
    ISBN: 9781786204981 , 1786204983
    Series Statement: Geological Society special publication no. 500
    URL: https://sp.lyellcollection.org/content/500/1
    DDC: 551.307
    Language: English
    Note: Also issued in print: 2020 , Includes bibliographical references and index
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    GEOMAR CATALOGUE
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  • 2
    Online Resource
    Online Resource
    Subaqueous mass movements and their consequences : assessing geohazards, environmental implications and economic significance of subaqueous landslides (2019)
    London : The Geological Society of London
    Details Availability
    Keywords: Submarine geology ; Landslides ; Mass-wasting ; Landslides ; Mass-wasting ; Submarine geology ; Aufsatzsammlung ; Meeresboden ; Suspensionsströmung ; Submarine Gleitung ; Turbidit ; Rutschung ; Aufsatzsammlung ; Meeresgeologie ; Massenbewegung ; Tsunami ; Turbiditätsströmung ; Konturit ; Flysch
    Description / Table of Contents: [I].Introduction:Advancing from subaqueous mass movement case studies to providing advice and mitigation /D. Gwyn Lintern, David C. Mosher and Martin Scherwath.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (vii, 609 Seiten) , Illustrationen, Karten
    Series Statement: Geological Society, London, special publications no. 477
    URL: https://sp.lyellcollection.org/content/477/1
    DDC: 551.307
    Language: English
    Note: Includes bibliographical references
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    GEOMAR CATALOGUE
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  • 3
    Electronic Resource
    Electronic Resource
    Onset of submarine debris flow deposition far from original giant landslide (2007)
    [s.l.] : Nature Publishing Group
    Nature 450 (2007), S. 541-544 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Submarine landslides can generate sediment-laden flows whose scale is impressive. Individual flow deposits have been mapped that extend for 1,500 km offshore from northwest Africa. These are the longest run-out sediment density flow deposits yet documented on Earth. This contribution ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature06313
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    Paper (German National Licenses)
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  • 4
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    Investigating the Basal Shear Zone of the Submarine Tuaheni Landslide Complex, New Zealand: A Core‐Log‐Seismic Integration Study (2022)
    Details
    Publication Date: 2022-03-29
    Description: Although submarine landslides have been studied for decades, a persistent challenge is the integration of diverse geoscientific datasets to characterize failure processes. We present a core‐log‐seismic integration study of the Tuaheni Landslide Complex to investigate intact sediments beneath the undeformed seafloor as well as post‐failure landslide deposits. Beneath the undeformed seafloor are coherent reflections underlain by a weakly‐reflective and chaotic seismic unit. This chaotic unit is characterized by variable shear strength that correlates with density fluctuations. The basal shear zone of the Tuaheni landslide likely exploited one (or more) of the low shear strength intervals. Within the landslide deposits is a widespread “Intra‐debris Reflector”, previously interpreted as the landslide's basal shear zone. This reflector is a subtle impedance drop around the boundary between upper and lower landslide units. However, there is no pronounced shear strength change across this horizon. Rather, there is a pronounced reduction in shear strength ∼10–15 m above the Intra‐debris Reflector that presumably represents an induced weak layer that developed during failure. Free gas accumulates beneath some regions of the landslide and is widespread deeper in the sedimentary sequence, suggesting that free gas may have played a role in pre‐conditioning the slope to failure. Additional pre‐conditioning or failure triggers could have been seismic shaking and associated transient fluid pressure. Our study underscores the importance of detailed core‐log‐seismic integration approaches for investigating basal shear zone development in submarine landslides.
    Description: Plain Language Summary: Submarine landslides move enormous amounts of sediment across the seafloor and have the potential to generate damaging tsunamis. To understand how submarine landslides develop, we need to be able to image and sample beneath the seafloor in regions where landslides have occurred. To image beneath the seafloor we generate sound waves in the ocean and record reflections from those waves, enabling us to produce “seismic images” of sediment layers and structures beneath the seafloor. We then use scientific drilling to sample the sediment layers and measure physical properties. In this study, we combine seismic images and drilling results to investigate a submarine landslide east of New Zealand's North Island. Drilling next to the landslide revealed a ∼25 m‐thick layer of sediment (from ∼75–95 m below the seafloor) that has strong variations in sediment strength and density. We infer that intervals of relatively low strength within this layer developed into the main sliding surface of the landslide. Additionally, results from within the landslide suggest that the process of landslide emplacement has induced a zone of weak sediments closer to the seafloor. Our study demonstrates how combining seismic images and drilling data helps to understand submarine landslide processes.
    Description: Key Points: We integrate scientific drilling data with seismic reflection data to investigate the submarine Tuaheni Landslide Complex. Basal shear zone of the landslide likely exploited a relatively low shear strength interval within an older (buried) mass transport deposit. Landslide emplacement seems to have induced an additional weak zone that is shallower than the interpreted base of the landslide deposit.
    Description: Marsden Fund (Royal Society of New Zealand Marsden Fund) http://dx.doi.org/10.13039/501100009193
    Description: European Consortium for Ocean Research Drilling
    Description: International Ocean Drilling Program, Science Support Program
    Description: New Zealand Ministry for Business Innovation and Employment
    Description: Deutsche Forschungsgemeinschaft (DFG) http://dx.doi.org/10.13039/501100001659
    Description: https://doi.pangaea.de/10.1594/PANGAEA.928073
    Keywords: ddc:622.15 ; ddc:551
    Language: English
    Type: doc-type:article
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    CITATION GEO-LEO
  • 5
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    International ocean discovery program expedition 372 preliminary report: Creeping gas hydrate slides and Hikurangi LWD (2018)
    Texan A&M University
    In:  Integrated Ocean Drilling Program: Preliminary Reports, 372 . Texan A&M University, 35 pp.
    Details
    Publication Date: 2020-12-23
    Description: International Ocean Discovery Program (IODP) Expedition 372 combined two research topics, slow slip events (SSEs) on subduction faults (IODP Proposal 781A-Full) and actively deforming gas hydrate-bearing landslides (IODP Proposal 841-APL). Our study area on the Hikurangi margin, east of the coast of New Zealand, provided unique locations for addressing both research topics.SSEs at subduction zones are an enigmatic form of creeping fault behavior. They typically occur on subduction zones at depths beyond the capabilities of ocean floor drilling. However, at the northern Hikurangi subduction margin they are among the best-documented and shallowest on Earth. Here, SSEs may extend close to the trench, where clastic and pelagic sediments about 1.0-1.5 km thick overlie the subducting, seamount-studded Hikurangi Plateau. Geodetic data show that these SSEs recur about every 2 years and are associated with measurable seafloor displacement. The northern Hikurangi subduction margin thus provides an excellent setting to use IODP capabilities to discern the mechanisms behind slow slip fault behaviour.
    Type: Report , NonPeerReviewed
    Format: text
    DOI: 10.14379/iodp.pr.372.2018
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    OceanRep: Report - Cruise Report
  • 6
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    Morphology and sediment dynamics of upper headwall area of the Sahara Slide Complex, NW Africa (2015)
    In:  [Poster] In: 7. International Symposium Submarine Mass Movements and Their Consequences, 01.-05.11.2015, Wellington, New Zealand .
    Details
    Publication Date: 2016-09-26
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Poster
  • 7
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    The Sahara Slide complex (NW-African continental margin) – New geophysical and sedimentological data from the headwall area (2011)
    In:  [Talk] In: 71. Jahrestagung der Deutschen Geophysikalischen Gesellschaft, 21.-24.02.2011, Köln .
    Details
    Publication Date: 2012-02-23
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Talk
  • 8
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    Expedition 372B/375 summary (2019)
    IODP
    In:  Proceedings of the International Ocean Discovery Program, 372B/375 . pp. 1-35.
    Details
    Publication Date: 2019-09-23
    Description: Slow slip events (SSEs) at the northern Hikurangi subduction margin, New Zealand, are among the best-documented shallow SSEs on Earth. International Ocean Discovery Program Expeditions 372 and 375 were undertaken to investigate the processes and in situ conditions that underlie subduction zone SSEs at the northern Hikurangi Trough. We accomplished this goal by (1) coring and geophysical logging at four sites, including penetration of an active thrust fault (the Pāpaku fault) near the deformation front, the upper plate above the SSE source region, and the incoming sedimentary succession in the Hikurangi Trough and atop the Tūranganui Knoll seamount; and (2) installing borehole observatories in the Pāpaku fault and in the upper plate overlying the slow slip source region. Logging-while-drilling (LWD) data for this project were acquired as part of Expedition 372, and coring, wireline logging, and observatory installations were conducted during Expedition 375. Northern Hikurangi subduction margin SSEs recur every 1–2 y and thus provide an ideal opportunity to monitor deformation and associated changes in chemical and physical properties throughout the slow slip cycle. In situ measurements and sampling of material from the sedimentary section and oceanic basement of the subducting plate reveal the rock properties, composition, lithology, and structural character of material that is transported downdip into the SSE source region. A recent seafloor geodetic experiment raises the possibility that SSEs at northern Hikurangi may propagate to the trench, indicating that the shallow thrust fault (the Pāpaku fault) targeted during Expeditions 372 and 375 may also lie in the SSE rupture area and host a portion of the slip in these events. Hence, sampling and logging at this location provides insights into the composition, physical properties, and architecture of a shallow fault that may host slow slip. Expeditions 372 and 375 were designed to address three fundamental scientific objectives: Characterize the state and composition of the incoming plate and shallow fault near the trench, which comprise the protolith and initial conditions for fault zone rock at greater depth and which may itself host shallow slow slip; Characterize material properties, thermal regime, and stress conditions in the upper plate directly above the SSE source region; and Install observatories in the Pāpaku fault near the deformation front and in the upper plate above the SSE source to measure temporal variations in deformation, temperature, and fluid flow. The observatories will monitor volumetric strain (via pore pressure as a proxy) and the evolution of physical, hydrological, and chemical properties throughout the SSE cycle. Together, the coring, logging, and observatory data will test a suite of hypotheses about the fundamental mechanics and behavior of SSEs and their relationship to great earthquakes along the subduction interface.
    Type: Article , NonPeerReviewed
    Format: archive
    Format: archive
    Format: other
    DOI: 10.14379/iodp.proc.372B375.101.2019
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    OceanRep: Article in a Scientific Journal - without review
  • 9
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    New data from the Sahara Slide complex off NW-African: timing, failure processes, and hazard potential (2011)
    In:  [Talk] In: EGU General Assembly 2011, 03.-08.04.2011, Vienna, Austria .
    Details
    Publication Date: 2012-02-23
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Talk
  • 10
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    Mass Wasting Along Atlantic Continental Margins: A Comparison Between NW-Africa and the de la Plata River Region (Northern Argentina and Uruguay) (2014)
    Springer International Publishing
    In:  In: Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research (37). Springer International Publishing, Cham, pp. 459-469. ISBN 978-3-319-00971-1
    Details
    Publication Date: 2019-09-23
    Description: The passive continental margins of the Atlantic Ocean are characterized by thick sedimentary successions, which might become unstable resulting in landslides of various sizes. The type of mass-wasting differs between individual margin sections but the reasons for these differences are not well understood. The NW-African continental margin is characterized by several large-scale but infrequent landslides, while the continental margin in the de la Plata River region (northern Argentina and Uruguay) shows widespread small-scale mass transport deposits. These different styles of mass wasting can be explained by different oceanographic and sedimentary settings. The margin off Northwest Africa is characterized by high primary productivity caused by oceanic upwelling as well as locally focused aeolian input resulting in relatively high sedimentation rates. This setting leads to sediment instabilities arising primarily from underconsolidation of deposited sediments and widespread weak layers. In contrast, the modern ocean margin off Uruguay and northern Argentina is characterized by strong contour currents and a high amount of fluvial sediment resulting in widespread contouritic deposits. These contourites are potentially unstable leading to smaller but more frequent landslides.
    Type: Book chapter , NonPeerReviewed
    Format: text
    DOI: 10.1007/978-3-319-00972-8_41
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    OceanRep: Book chapter
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