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  • CAU  (1)
  • DFG-Senatskommission für Ozeanographie  (1)
  • Forschungszentrum Jülich, Projektträger Biologie, Energie, Ökologie, Bereich Meeres- und Polarforschung  (1)
  • 1
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    Segmentation of the 1960 Great Chile (Mw 9.5) and the 2010 Maule (Mw 8.8) earthquakes controlled by a giant submarine slope failure (2012)
    CAU
    In:  [Talk] In: The Lübeck Retreat, Collaborative Research Centre SFB 574, Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters, 23.05.-25.05.2012, Lübeck . The Lübeck Retreat - final colloquium of SFB 574, May 23-25, 2012: program & abstracts ; p. 6 .
    Details
    Publication Date: 2019-09-23
    Description: About 1000 km of the South Chilean margin were ruptured in 1960 by the Mw 9.5 Great Chile Earthquake. Early in 2010 the immediate area to the north was affected by the Mw 8.8 Maule Earthquake. In the area of the rupture boundary three giant Pleistocene submarine slope failures are observed in bathymetric and reflection seismic data. The slope failures each shifted volumes between 253 km$ and 472 km$ of slope sediments, compacted accretionary wedge material and continental framework rock from the continental slope into the trench. Seismic reflection data image an undisturbed well layered sedimentary trench fill and a continuous décollement in the areas where no slope failures are observed. However, at the exact locations of the slope failures, which coincide with the boundaries of the 1960 and 2010 ruptures, chaotic slide deposits compose the lower part of the trench-fill. At these locations no continuous décollement has developed. We speculate that the underthrusting of the highly inhomogeneous slide deposits prevents the development of a continuous décollement and thus the buildup of a thin (few millimeters) slip zone that is continuous in space as necessary for earthquake rupture propagation. Thus the 1960 Great Chile – 2010 Maule earthquake rupture boundary seems to be controlled by the underthrusting of products of giant submarine slope failures which impeded further propagation of earthquake rupture during both events. Our results emphasize that upper plate mass wasting, if it impacts on the internal structure and composition of the subduction channel rocks, can play a key role in defining seismotectonic segmentation at convergent plate boundaries.
    Type: Conference or Workshop Item , NonPeerReviewed
    Location Call Number Limitation Availability
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    OceanRep: Talk
  • 2
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    ADRIA LITHOSPHERE INVESTIGATION ALPHA - Cruise No. M86/3, January 20 - February 04, 2012, Brindisi (Italy) - Dubrovnik (Croatia) (2013)
    DFG-Senatskommission für Ozeanographie
    In:  METEOR-Berichte, M86/3 . DFG-Senatskommission für Ozeanographie, Bremen, 48 pp.
    Details
    Publication Date: 2017-09-14
    Description: The Adriatic Sea and underlying lithosphere remains the least investigated part of the Mediterranean Sea. To shed light on the plate tectonic setting in this central part of southern Europe, R/V METEOR cruise M86/3 set out to acquire deep penetrating seismic data in the Adriatic Sea. M86/3 formed the core of an amphibious investigation crossing Adria from the Italian Peninsula into Montenegro/Albania. A total of 111 OBS/OBH deployments were successfully carried out, in addition to 47 landstations both in Italy and Montenegro/Albania, which recorded the offshore airgun shots. In the scope of this shoreline-crossing study, the aim is to quantify the shallow geometry, deep boundaries and the architecture of the southern Adriatic crust and lithosphere and to provide insights on a possible decoupling zone between the northern and southern Adriatic domains. Investigating the structure of the Adriatic crust and lithospheric mantle and analyzing the tectonic activity are essential for understanding the mountain-building processes that underlie the neotectonics and earthquake hazard of the Periadriatic region, especially in the vicinity of local decoupling zones.
    Type: Report , NonPeerReviewed
    Format: text
    DOI: 10.2312/cr_m86_3
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    OceanRep: Report - Cruise Report
  • 3
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    Bathymetrische Kartierungen am aktiven chilenischen Kontinentalrand vor und nach dem Magnitude -8.8 - Erdbeben vom 27.02.2010 (2011)
    Forschungszentrum Jülich, Projektträger Biologie, Energie, Ökologie, Bereich Meeres- und Polarforschung
    In:  [Talk] In: Statusseminar Meeresforschung mit FS Sonne 2011, 09.-10.02.2011, Hannover . Tagungsband / Meeresforschung mit FS Sonne : Statusseminar 2011 ; pp. 88-90 .
    Details
    Publication Date: 2012-07-06
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Talk
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