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Morphology and geology of the continental shelf and upper slope of southern Central Chile (33°S–43°S)

Morphology and geology of the continental shelf and upper slope of southern Central Chile (33°S–43°S)
Morphology and geology of the continental shelf and upper slope of southern Central Chile (33°S–43°S)
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 Additionally, unpublished data such as reflection seismic profiles, swath bathymetry and observations on biota that allow further insights into the evolution of this continental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.
Southern Central Chile, Bathymetry, Shelf sedimentation, Shelf basins, Submarine faults, Seismicity, Fluid seepage
1437-3254
1765-1787
Völker, David
f2b8a74f-9346-407a-8129-a90140ee5d3a
Geersen, Jacob
abcf5f76-3608-4322-ab54-7bfb8dfcaf2d
Contreras-Reyes, Eduardo
78392818-3831-48dd-905e-ba5456363d51
Sellanes, Javier
c552417a-ae9a-4532-b9ba-5f1f7cf583b4
Pantoja, Silvio
fe4bb25e-f45f-4437-a523-8f2896d9b81a
Rabbel, Wolfgang
e0f229fe-093f-4656-b2be-55f716ab1b78
Thorwart, Martin
25ec7833-dd72-469b-bbf0-b1fd6a527e09
Reichert, Christian
ca6c2a14-cd0e-43f4-93d5-991ed2ae4b9c
Block, Martin
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Weinrebe, Wilhelm Reimer
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Völker, David
f2b8a74f-9346-407a-8129-a90140ee5d3a
Geersen, Jacob
abcf5f76-3608-4322-ab54-7bfb8dfcaf2d
Contreras-Reyes, Eduardo
78392818-3831-48dd-905e-ba5456363d51
Sellanes, Javier
c552417a-ae9a-4532-b9ba-5f1f7cf583b4
Pantoja, Silvio
fe4bb25e-f45f-4437-a523-8f2896d9b81a
Rabbel, Wolfgang
e0f229fe-093f-4656-b2be-55f716ab1b78
Thorwart, Martin
25ec7833-dd72-469b-bbf0-b1fd6a527e09
Reichert, Christian
ca6c2a14-cd0e-43f4-93d5-991ed2ae4b9c
Block, Martin
9ce8c033-f579-4c0f-b0c6-9223268adc04
Weinrebe, Wilhelm Reimer
4d55571c-b060-4ce5-b9d9-546f73ea5f67

Völker, David, Geersen, Jacob, Contreras-Reyes, Eduardo, Sellanes, Javier, Pantoja, Silvio, Rabbel, Wolfgang, Thorwart, Martin, Reichert, Christian, Block, Martin and Weinrebe, Wilhelm Reimer (2014) Morphology and geology of the continental shelf and upper slope of southern Central Chile (33°S–43°S). International Journal of Earth Sciences, 103 (7), 1765-1787. (doi:10.1007/s00531-012-0795-y).

Record type: Article

Abstract

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.

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More information

e-pub ahead of print date: 2012
Published date: October 2014
Keywords: Southern Central Chile, Bathymetry, Shelf sedimentation, Shelf basins, Submarine faults, Seismicity, Fluid seepage
Organisations: Geology & Geophysics

Identifiers

Local EPrints ID: 340156
URI: http://eprints.soton.ac.uk/id/eprint/340156
ISSN: 1437-3254
PURE UUID: f81d1b9c-58fd-465c-bfb0-3de3e9219edf

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Date deposited: 13 Jun 2012 13:35
Last modified: 14 Mar 2024 11:19

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Contributors

Author: David Völker
Author: Jacob Geersen
Author: Eduardo Contreras-Reyes
Author: Javier Sellanes
Author: Silvio Pantoja
Author: Wolfgang Rabbel
Author: Martin Thorwart
Author: Christian Reichert
Author: Martin Block
Author: Wilhelm Reimer Weinrebe

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