Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica
ABSTRACT Active continental margins are tectonic sites with complex sedimentary processes. Tectono–sedimentary interactions occur over geological time and determine the modern morphology of the margin. However, such interactions have been poorly documented in high‐latitude regions. This study focuse...
Published in: | Sedimentology |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2023
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/sed.13092 https://onlinelibrary.wiley.com/doi/pdf/10.1111/sed.13092 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/sed.13092 |
id |
crwiley:10.1111/sed.13092 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/sed.13092 2024-09-15T17:44:57+00:00 Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica Liu, Shan Yang, Chupeng Yin, Shaoru Zhuo, Haiteng Su, Ming Luo, Kunwen Xu, Ziying Zhu, Rongwei Liang, Zijun China Geological Survey China Postdoctoral Science Foundation National Natural Science Foundation of China 2023 http://dx.doi.org/10.1111/sed.13092 https://onlinelibrary.wiley.com/doi/pdf/10.1111/sed.13092 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/sed.13092 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Sedimentology volume 70, issue 5, page 1353-1378 ISSN 0037-0746 1365-3091 journal-article 2023 crwiley https://doi.org/10.1111/sed.13092 2024-08-01T04:23:45Z ABSTRACT Active continental margins are tectonic sites with complex sedimentary processes. Tectono–sedimentary interactions occur over geological time and determine the modern morphology of the margin. However, such interactions have been poorly documented in high‐latitude regions. This study focuses on deep‐water sedimentary systems on the South Shetland convergent margin, which is the only remaining active continental margin in Antarctica. Numerous gullies, 20 canyons and three contourite drifts are identified by interpreting bathymetry, oceanography and reflection seismic data. Heavy mineral contents of a gravity core, located at a downslope elongated mounded drift, show the asynchronous interplay of downslope and alongslope processes. The rest of the margin is dominated by turbidity currents. Variations in the slope gradient control thalweg profiles and sinuosity of canyons. Tectonic‐related morphology restricts the distribution of contourite drifts. Earthquakes triggered by underplating and tectonic compression may induce slope instability at the lower flank of the plastered drift. Tectonic uplift influences the amount of sediments transported by ice sheets and controls the shelf stacking pattern. The mixed turbidite–contourite system transitions to separated canyon and drift systems from passive to active continental margins under the influence of the tectonic‐related morphology. A systematic comparison has been made among several convergent margins with similar tectonic settings. Results suggest that submarine canyons on these shelf‐slope systems have similar morphological features and are comparable in size. Coarse sediment input and steep continental slopes (mean slope 7 to 10°) control the canyon morphology on these margins. Therefore, this research has important implications for furthering the current understanding of sedimentary systems on high‐latitude convergent margins and tectono–sedimentary interactions. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Sedimentology 70 5 1353 1378 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT Active continental margins are tectonic sites with complex sedimentary processes. Tectono–sedimentary interactions occur over geological time and determine the modern morphology of the margin. However, such interactions have been poorly documented in high‐latitude regions. This study focuses on deep‐water sedimentary systems on the South Shetland convergent margin, which is the only remaining active continental margin in Antarctica. Numerous gullies, 20 canyons and three contourite drifts are identified by interpreting bathymetry, oceanography and reflection seismic data. Heavy mineral contents of a gravity core, located at a downslope elongated mounded drift, show the asynchronous interplay of downslope and alongslope processes. The rest of the margin is dominated by turbidity currents. Variations in the slope gradient control thalweg profiles and sinuosity of canyons. Tectonic‐related morphology restricts the distribution of contourite drifts. Earthquakes triggered by underplating and tectonic compression may induce slope instability at the lower flank of the plastered drift. Tectonic uplift influences the amount of sediments transported by ice sheets and controls the shelf stacking pattern. The mixed turbidite–contourite system transitions to separated canyon and drift systems from passive to active continental margins under the influence of the tectonic‐related morphology. A systematic comparison has been made among several convergent margins with similar tectonic settings. Results suggest that submarine canyons on these shelf‐slope systems have similar morphological features and are comparable in size. Coarse sediment input and steep continental slopes (mean slope 7 to 10°) control the canyon morphology on these margins. Therefore, this research has important implications for furthering the current understanding of sedimentary systems on high‐latitude convergent margins and tectono–sedimentary interactions. |
author2 |
China Geological Survey China Postdoctoral Science Foundation National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Liu, Shan Yang, Chupeng Yin, Shaoru Zhuo, Haiteng Su, Ming Luo, Kunwen Xu, Ziying Zhu, Rongwei Liang, Zijun |
spellingShingle |
Liu, Shan Yang, Chupeng Yin, Shaoru Zhuo, Haiteng Su, Ming Luo, Kunwen Xu, Ziying Zhu, Rongwei Liang, Zijun Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica |
author_facet |
Liu, Shan Yang, Chupeng Yin, Shaoru Zhuo, Haiteng Su, Ming Luo, Kunwen Xu, Ziying Zhu, Rongwei Liang, Zijun |
author_sort |
Liu, Shan |
title |
Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica |
title_short |
Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica |
title_full |
Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica |
title_fullStr |
Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica |
title_full_unstemmed |
Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica |
title_sort |
deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in antarctica |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/sed.13092 https://onlinelibrary.wiley.com/doi/pdf/10.1111/sed.13092 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/sed.13092 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Sedimentology volume 70, issue 5, page 1353-1378 ISSN 0037-0746 1365-3091 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/sed.13092 |
container_title |
Sedimentology |
container_volume |
70 |
container_issue |
5 |
container_start_page |
1353 |
op_container_end_page |
1378 |
_version_ |
1810492649498476544 |