Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology
High-resolution seismic profiles along with physical and sedimentological properties of sediment cores from the Saguenay (Eastern Canada) and Reloncavi (Chile) Fjords allowed the identification of several decimeter to meter-thick turbidites. In both fjords, the turbidites were associated with large...
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Online Access: | https://espace.library.uq.edu.au/view/UQ:b392e0a |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:b392e0a 2023-05-15T16:41:14+02:00 Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology St-Onge, Guillaume Chapron, Emmanuel Mulsow, Sandor Salas, Marcos Viel, Matias Debret, Maxime Foucher, Anthony Mulder, Thierry Winiarski, Thierry Desmet, Marc Costa, Pedro J. M. Ghaleb, Bassam Jaouen, Alain Locat, Jacques 2012-01-01 https://espace.library.uq.edu.au/view/UQ:b392e0a eng eng Elsevier doi:10.1016/j.sedgeo.2011.11.003 issn:0037-0738 orcid:0000-0003-0358-5676 1050247 San-Andreas Fault British-Columbia Southern Chile Mass Movements Lake District Seismic Stratigraphy Subduction Zone Saanich Inlet Anoxic Fjord Ice-Sheet Journal Article 2012 ftunivqespace https://doi.org/10.1016/j.sedgeo.2011.11.003 2020-10-06T02:42:11Z High-resolution seismic profiles along with physical and sedimentological properties of sediment cores from the Saguenay (Eastern Canada) and Reloncavi (Chile) Fjords allowed the identification of several decimeter to meter-thick turbidites. In both fjords, the turbidites were associated with large magnitude historic and pre-historic earthquakes including the 1663 AD (M > 7) earthquake in the Saguenay Fjord, and the 1960 (M 9.5), 1837 (M similar to 8) and 1575 AD major Chilean subduction earthquakes in the Reloncavi Fjord. In addition, a sand layer with exoscopic characteristics typical of a tsunami deposit was observed immediately above the turbidite associated with the 1575 AD earthquake in the Reloncavi Fjord and supports both the chronology and the large magnitude of that historic earthquake. In the Saguenay Fjord, the earthquake-triggered turbidites are sometimes underlying a hyperpycnite associated with the rapid breaching and draining of a natural dam formed by earthquake-triggered landslides. Similar hyperpycnal floods were also recorded in historical and continental geological archives for the 1960 and 1575 AD Chilean subduction earthquakes, highlighting the risk of such flood events several weeks or months after main earthquake. In both fjords, as well as in other recently recognized earthquake-triggered turbidites, the decimeter-to meter-thick normally-graded turbidites are characterized by a homogeneous, but slightly fining upward tail. Finally, this paper also emphasizes the sensitivity of fjords to record historic and pre-historic seismicity. Article in Journal/Newspaper Ice Sheet The University of Queensland: UQ eSpace Canada British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Andreas ENVELOPE(-60.729,-60.729,-64.008,-64.008) Sedimentary Geology 243-244 89 107 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
San-Andreas Fault British-Columbia Southern Chile Mass Movements Lake District Seismic Stratigraphy Subduction Zone Saanich Inlet Anoxic Fjord Ice-Sheet |
spellingShingle |
San-Andreas Fault British-Columbia Southern Chile Mass Movements Lake District Seismic Stratigraphy Subduction Zone Saanich Inlet Anoxic Fjord Ice-Sheet St-Onge, Guillaume Chapron, Emmanuel Mulsow, Sandor Salas, Marcos Viel, Matias Debret, Maxime Foucher, Anthony Mulder, Thierry Winiarski, Thierry Desmet, Marc Costa, Pedro J. M. Ghaleb, Bassam Jaouen, Alain Locat, Jacques Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology |
topic_facet |
San-Andreas Fault British-Columbia Southern Chile Mass Movements Lake District Seismic Stratigraphy Subduction Zone Saanich Inlet Anoxic Fjord Ice-Sheet |
description |
High-resolution seismic profiles along with physical and sedimentological properties of sediment cores from the Saguenay (Eastern Canada) and Reloncavi (Chile) Fjords allowed the identification of several decimeter to meter-thick turbidites. In both fjords, the turbidites were associated with large magnitude historic and pre-historic earthquakes including the 1663 AD (M > 7) earthquake in the Saguenay Fjord, and the 1960 (M 9.5), 1837 (M similar to 8) and 1575 AD major Chilean subduction earthquakes in the Reloncavi Fjord. In addition, a sand layer with exoscopic characteristics typical of a tsunami deposit was observed immediately above the turbidite associated with the 1575 AD earthquake in the Reloncavi Fjord and supports both the chronology and the large magnitude of that historic earthquake. In the Saguenay Fjord, the earthquake-triggered turbidites are sometimes underlying a hyperpycnite associated with the rapid breaching and draining of a natural dam formed by earthquake-triggered landslides. Similar hyperpycnal floods were also recorded in historical and continental geological archives for the 1960 and 1575 AD Chilean subduction earthquakes, highlighting the risk of such flood events several weeks or months after main earthquake. In both fjords, as well as in other recently recognized earthquake-triggered turbidites, the decimeter-to meter-thick normally-graded turbidites are characterized by a homogeneous, but slightly fining upward tail. Finally, this paper also emphasizes the sensitivity of fjords to record historic and pre-historic seismicity. |
format |
Article in Journal/Newspaper |
author |
St-Onge, Guillaume Chapron, Emmanuel Mulsow, Sandor Salas, Marcos Viel, Matias Debret, Maxime Foucher, Anthony Mulder, Thierry Winiarski, Thierry Desmet, Marc Costa, Pedro J. M. Ghaleb, Bassam Jaouen, Alain Locat, Jacques |
author_facet |
St-Onge, Guillaume Chapron, Emmanuel Mulsow, Sandor Salas, Marcos Viel, Matias Debret, Maxime Foucher, Anthony Mulder, Thierry Winiarski, Thierry Desmet, Marc Costa, Pedro J. M. Ghaleb, Bassam Jaouen, Alain Locat, Jacques |
author_sort |
St-Onge, Guillaume |
title |
Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology |
title_short |
Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology |
title_full |
Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology |
title_fullStr |
Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology |
title_full_unstemmed |
Comparison of earthquake-triggered turbidites from the Saguenay (Eastern Canada) and Reloncavi (Chilean margin) Fjords: Implications for paleoseismicity and sedimentology |
title_sort |
comparison of earthquake-triggered turbidites from the saguenay (eastern canada) and reloncavi (chilean margin) fjords: implications for paleoseismicity and sedimentology |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://espace.library.uq.edu.au/view/UQ:b392e0a |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-60.729,-60.729,-64.008,-64.008) |
geographic |
Canada British Columbia Andreas |
geographic_facet |
Canada British Columbia Andreas |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
doi:10.1016/j.sedgeo.2011.11.003 issn:0037-0738 orcid:0000-0003-0358-5676 1050247 |
op_doi |
https://doi.org/10.1016/j.sedgeo.2011.11.003 |
container_title |
Sedimentary Geology |
container_volume |
243-244 |
container_start_page |
89 |
op_container_end_page |
107 |
_version_ |
1766031667655344128 |