A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula
The Shackleton Fracture Zone (SFZ) and the South Shetland Trench (SST) are prominent bathymetric structures in the Southeast Pacific off Antarctic Peninsula. The SFZ comprises a high ridge and a deep trough. The SFZ ridge was probably formed by the uplift of low-density material like serpentinite. T...
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Polar Research Center, Korea Ocean Research and Development Institute/Polar Research Center, Korea Ocean Research and Development Institute
1998
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ftnipr:oai:nipr.repo.nii.ac.jp:00002346 2023-05-15T13:48:00+02:00 A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula Young Keun Jin Yeadong Kim 1998-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2346 http://id.nii.ac.jp/1291/00002346/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2346&item_no=1&attribute_id=18&file_no=1 en eng Polar Research Center, Korea Ocean Research and Development Institute/Polar Research Center, Korea Ocean Research and Development Institute https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2346 http://id.nii.ac.jp/1291/00002346/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 53, 203-213(1998-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2346&item_no=1&attribute_id=18&file_no=1 Shackleton Fracture Zone South Shetland Trench crustal model tectonic evolution Antarctic Peninsula Departmental Bulletin Paper P(論文) 1998 ftnipr 2022-11-12T19:43:08Z The Shackleton Fracture Zone (SFZ) and the South Shetland Trench (SST) are prominent bathymetric structures in the Southeast Pacific off Antarctic Peninsula. The SFZ comprises a high ridge and a deep trough. The SFZ ridge was probably formed by the uplift of low-density material like serpentinite. Two phases of deformation observed in the trough suggest that (1) a large-scale crustal faulting due to transtensional movement along the SFZ during Drake Passage opening before 6 Ma formed the deep trough, and (2) recent contractional structures around the trough are indicative of the present convergence between the Scotia and Antarctic plates. The angle of subduction of oceanic crust in the SST increases from southwest to northeast along the SST as its age increases from southwest to northeast. Because thick accumulation of sediments is not expected in active trenches with a horst and graben structure, the presence of thick trench-fill sediments (up to 1300m) over a horst and graben structure in the South Shetland Trench (SST) indicates that they accumulated after the cessation of subduction at about 4 Ma. Report Antarc* Antarctic Antarctic Peninsula Drake Passage Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Antarctic Antarctic Peninsula Drake Passage Shackleton Pacific Shackleton Fracture Zone ENVELOPE(-60.000,-60.000,-60.000,-60.000) South Shetland Trench ENVELOPE(-59.500,-59.500,-61.000,-61.000) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Shackleton Fracture Zone South Shetland Trench crustal model tectonic evolution Antarctic Peninsula |
spellingShingle |
Shackleton Fracture Zone South Shetland Trench crustal model tectonic evolution Antarctic Peninsula Young Keun Jin Yeadong Kim A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula |
topic_facet |
Shackleton Fracture Zone South Shetland Trench crustal model tectonic evolution Antarctic Peninsula |
description |
The Shackleton Fracture Zone (SFZ) and the South Shetland Trench (SST) are prominent bathymetric structures in the Southeast Pacific off Antarctic Peninsula. The SFZ comprises a high ridge and a deep trough. The SFZ ridge was probably formed by the uplift of low-density material like serpentinite. Two phases of deformation observed in the trough suggest that (1) a large-scale crustal faulting due to transtensional movement along the SFZ during Drake Passage opening before 6 Ma formed the deep trough, and (2) recent contractional structures around the trough are indicative of the present convergence between the Scotia and Antarctic plates. The angle of subduction of oceanic crust in the SST increases from southwest to northeast along the SST as its age increases from southwest to northeast. Because thick accumulation of sediments is not expected in active trenches with a horst and graben structure, the presence of thick trench-fill sediments (up to 1300m) over a horst and graben structure in the South Shetland Trench (SST) indicates that they accumulated after the cessation of subduction at about 4 Ma. |
format |
Report |
author |
Young Keun Jin Yeadong Kim |
author_facet |
Young Keun Jin Yeadong Kim |
author_sort |
Young Keun Jin |
title |
A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula |
title_short |
A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula |
title_full |
A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula |
title_fullStr |
A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula |
title_full_unstemmed |
A crustal model and its tectonic implication on the evolution of the Pacific margin of the northern Antarctic Peninsula |
title_sort |
crustal model and its tectonic implication on the evolution of the pacific margin of the northern antarctic peninsula |
publisher |
Polar Research Center, Korea Ocean Research and Development Institute/Polar Research Center, Korea Ocean Research and Development Institute |
publishDate |
1998 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2346 http://id.nii.ac.jp/1291/00002346/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2346&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-60.000,-60.000,-60.000,-60.000) ENVELOPE(-59.500,-59.500,-61.000,-61.000) |
geographic |
Antarctic Antarctic Peninsula Drake Passage Shackleton Pacific Shackleton Fracture Zone South Shetland Trench |
geographic_facet |
Antarctic Antarctic Peninsula Drake Passage Shackleton Pacific Shackleton Fracture Zone South Shetland Trench |
genre |
Antarc* Antarctic Antarctic Peninsula Drake Passage Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Drake Passage Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2346 http://id.nii.ac.jp/1291/00002346/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 53, 203-213(1998-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2346&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248364732579840 |