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Advances in Geosciences An open-access journal for refereed proceedings and special publications

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Adv. Geosci., 22, 155-167, 2009
https://doi.org/10.5194/adgeo-22-155-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
14 Dec 2009
Mass wasting at the base of the south central Chilean continental margin: the Reloca Slide
D. Völker1, W. Weinrebe1, J. H. Behrmann1,2, J. Bialas2, and D. Klaeschen2 1SFB574, IFM-GEOMAR Leibniz Institute for Marine Sciences at the University of Kiel, Wischhofstr. 1–3, Kiel, Germany
2Marine Geodynamics, IFM-GEOMAR Leibniz Institute for Marine Sciences at the University of Kiel, Wischhofstr. 1–3, Kiel, Germany
Abstract. Offshore south central Chile (35° S–42° S), the morphology of the lowermost continental slope and trench floor witnesses a voluminous submarine mass-wasting event. The blocky slide body deposited in the Chile Trench at 73°46´ W 35°35´ S was targeted for study during RRS JAMES COOK Cruise JC23 and termed Reloca Slide. Its size of about 24 km3, its steep and high headscarp, the spatial distribution of slide deposits and the cohesive nature of major slide blocks make it interesting to address the issue of tsunami generation. We have obtained seismic reflection data that partly reveal the internal structure of the slide body. Gravity core samples were retrieved that will allow the slide to be dated and linked to the history of sedimentation and slope stability along this particular segment of the Chilean convergent margin. At present we assume a Holocene age for the sliding event.

Citation: Völker, D., Weinrebe, W., Behrmann, J. H., Bialas, J., and Klaeschen, D.: Mass wasting at the base of the south central Chilean continental margin: the Reloca Slide, Adv. Geosci., 22, 155-167, https://doi.org/10.5194/adgeo-22-155-2009, 2009.
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