Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin
ABSTRACT A detailed regional characterization of the physiography, morphology and sedimentary systems of the Central Bransfield Basin (CBB) was carried out using swath bathymetry and high‐ and very high‐resolution seismic profiles. The basin margins show continental shelves with numerous glacial tro...
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crwiley:10.1111/j.1365-2117.2008.00386.x 2024-06-02T07:55:48+00:00 Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin García, Marga Ercilla, Gemma Alonso, Belén 2009 http://dx.doi.org/10.1111/j.1365-2117.2008.00386.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2117.2008.00386.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2117.2008.00386.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Basin Research volume 21, issue 3, page 295-314 ISSN 0950-091X 1365-2117 journal-article 2009 crwiley https://doi.org/10.1111/j.1365-2117.2008.00386.x 2024-05-03T11:36:18Z ABSTRACT A detailed regional characterization of the physiography, morphology and sedimentary systems of the Central Bransfield Basin (CBB) was carried out using swath bathymetry and high‐ and very high‐resolution seismic profiles. The basin margins show continental shelves with numerous glacial troughs, and continental slopes where relatively wide and flat slope platforms represent the middle domain in an atypical physiographic scenario in glaciated margins. Although the CBB is tectonically active, most of the morphologic features are sedimentary in origin, and can be classified into four sedimentary systems: (1) glacial‐glaciomarine, composed of erosional surfaces, glacial troughs, furrows and draping sheets; (2) slope‐basin, formed by trough mouth fans, slope aprons, the Gebra‐Magia instability complex and turbidity systems; (3) seabed fluid outflow system composed of pockmark fields; and (4) contourite, composed of drifts and moats. The sedimentary systems show a clear zonation from shelf to basin and their dynamics reflects the complex interplay among glacial, glaciomarine, marine and oceanographic processes involved in the entire shelf‐to‐basin sediment distribution. The CBB morphology is primarily controlled by glacial/interglacial cyclicity and physiography and to a lesser extent by tectonics and oceanography. These factors have affected the South Shetland Islands (SSI) and Antarctic Peninsula (AP) margins differently, creating a relatively starved SSI margin and a more constructional AP margin. They have also created two entire sediment‐dispersal domains: the shelf‐to‐slope, which records the glaciation history of the CBB; and the lower slope‐to‐basin, which records the imprint of local factors. This study provides a ‘source‐to‐sink’ sedimentary scheme for glaciated margins, which may be applied to the basin research in other margins, based on the characterization of sedimentary systems, their boundaries and the linkages among them. This approach proves to be adequate for the identification of global ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula South Shetland Islands Wiley Online Library Antarctic Antarctic Peninsula South Shetland Islands Basin Research 21 3 295 314 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT A detailed regional characterization of the physiography, morphology and sedimentary systems of the Central Bransfield Basin (CBB) was carried out using swath bathymetry and high‐ and very high‐resolution seismic profiles. The basin margins show continental shelves with numerous glacial troughs, and continental slopes where relatively wide and flat slope platforms represent the middle domain in an atypical physiographic scenario in glaciated margins. Although the CBB is tectonically active, most of the morphologic features are sedimentary in origin, and can be classified into four sedimentary systems: (1) glacial‐glaciomarine, composed of erosional surfaces, glacial troughs, furrows and draping sheets; (2) slope‐basin, formed by trough mouth fans, slope aprons, the Gebra‐Magia instability complex and turbidity systems; (3) seabed fluid outflow system composed of pockmark fields; and (4) contourite, composed of drifts and moats. The sedimentary systems show a clear zonation from shelf to basin and their dynamics reflects the complex interplay among glacial, glaciomarine, marine and oceanographic processes involved in the entire shelf‐to‐basin sediment distribution. The CBB morphology is primarily controlled by glacial/interglacial cyclicity and physiography and to a lesser extent by tectonics and oceanography. These factors have affected the South Shetland Islands (SSI) and Antarctic Peninsula (AP) margins differently, creating a relatively starved SSI margin and a more constructional AP margin. They have also created two entire sediment‐dispersal domains: the shelf‐to‐slope, which records the glaciation history of the CBB; and the lower slope‐to‐basin, which records the imprint of local factors. This study provides a ‘source‐to‐sink’ sedimentary scheme for glaciated margins, which may be applied to the basin research in other margins, based on the characterization of sedimentary systems, their boundaries and the linkages among them. This approach proves to be adequate for the identification of global ... |
format |
Article in Journal/Newspaper |
author |
García, Marga Ercilla, Gemma Alonso, Belén |
spellingShingle |
García, Marga Ercilla, Gemma Alonso, Belén Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin |
author_facet |
García, Marga Ercilla, Gemma Alonso, Belén |
author_sort |
García, Marga |
title |
Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin |
title_short |
Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin |
title_full |
Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin |
title_fullStr |
Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin |
title_full_unstemmed |
Morphology and sedimentary systems in the Central Bransfield Basin, Antarctic Peninsula: sedimentary dynamics from shelf to basin |
title_sort |
morphology and sedimentary systems in the central bransfield basin, antarctic peninsula: sedimentary dynamics from shelf to basin |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1365-2117.2008.00386.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2117.2008.00386.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2117.2008.00386.x |
geographic |
Antarctic Antarctic Peninsula South Shetland Islands |
geographic_facet |
Antarctic Antarctic Peninsula South Shetland Islands |
genre |
Antarc* Antarctic Antarctic Peninsula South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula South Shetland Islands |
op_source |
Basin Research volume 21, issue 3, page 295-314 ISSN 0950-091X 1365-2117 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2117.2008.00386.x |
container_title |
Basin Research |
container_volume |
21 |
container_issue |
3 |
container_start_page |
295 |
op_container_end_page |
314 |
_version_ |
1800751377704550400 |