Morphology and geology of the continental shelf and upper slope of southern Central Chile (32°S-43°S)
Völker, David, Geersen, Jacob, Contreras-Reyes, Eduardo, Sellanes, J., Pantoja, S., Rabbel, Wolfgang, Thorwart, Martin, Reichert, C., Block, M. and Weinrebe, Wilhelm (2012) Morphology and geology of the continental shelf and upper slope of southern Central Chile (32°S-43°S) International Journal of Earth Sciences . DOI 10.1007/s00531-012-0795-y.
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The continental shelf and slope of southern Central Chile have been subject to a number of international as well as Chilean research campaigns over the last 30 years. This work summarizes the geologic setting of the southern Central Chilean Continental shelf (33°S–43°S) using recently published geophysical, seismological, sedimentological and bio-geochemical data. Additionally, unpublished data such as reflection seismic profiles, swath bathymetry and observations on biota that allow further insights into the evolution of this continental platform are integrated. The outcome is an overview of the current knowledge about the geology of the southern Central Chilean shelf and upper slope. We observe both patches of reduced as well as high recent sedimentation on the shelf and upper slope, due to local redistribution of fluvial input, mainly governed by bottom currents and submarine canyons and highly productive upwelling zones. Shelf basins show highly variable thickness of Oligocene-Quaternary sedimentary units that are dissected by the marine continuations of upper plate faults known from land. Seismic velocity studies indicate that a paleo-accretionary complex that is sandwiched between the present, relatively small active accretionary prism and the continental crust forms the bulk of the continental margin of southern Central Chile.
|Keywords:||Southern Central Chile; Bathymetry; Shelf sedimentation; Shelf basins; Submarine faults; Seismicity; Fluid seepage; Marine geodynamics; Marine Geophysics; Marine geodesy; Marine geology|
|Research affiliation:||OceanRep > SFB 574 > A1
Kiel University > Faculty of Mathematics and Natural Sciences > Institute of Geosciences
OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Geodynamics
|Date Deposited:||18 Jan 2012 10:19|
|Last Modified:||28 Feb 2013 12:40|
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