Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica
The Neogene Terror Rift in the Antarctic Victoria Land Basin (VLB) of the Ross Sea, Antarctica, is composed of the Discovery Graben and the Lee Arch. Many Neogene volcanoes are aligned in the north-south direction in the southern VLB, belonging to the McMurdo Volcanic Group. However, due to multiple...
Published in: | Earth and Planetary Physics |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Science Press
2022
|
Subjects: | |
Online Access: | https://doi.org/10.26464/epp2022023 https://doaj.org/article/14618883d8df4ad092ba5eb85c291cc0 |
id |
ftdoajarticles:oai:doaj.org/article:14618883d8df4ad092ba5eb85c291cc0 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:14618883d8df4ad092ba5eb85c291cc0 2023-05-15T13:49:20+02:00 Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica Mei Yue JinYao Gao ChunFeng Li Chao Zhu XinZhi Fan Guochao Wu ZhongYan Shen Han Shi XiaoXian Cai YiDong Guo 2022-04-01T00:00:00Z https://doi.org/10.26464/epp2022023 https://doaj.org/article/14618883d8df4ad092ba5eb85c291cc0 EN eng Science Press http://www.eppcgs.org/article/doi/10.26464/epp2022023?pageType=en https://doaj.org/toc/2096-3955 2096-3955 doi:10.26464/epp2022023 https://doaj.org/article/14618883d8df4ad092ba5eb85c291cc0 Earth and Planetary Physics, Vol 6, Iss 3, Pp 248-258 (2022) victoria land basin terror rift seismic stratigraphy gravity and magnetic modeling faulting neogene volcanic intrusion Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 article 2022 ftdoajarticles https://doi.org/10.26464/epp2022023 2022-12-31T02:24:33Z The Neogene Terror Rift in the Antarctic Victoria Land Basin (VLB) of the Ross Sea, Antarctica, is composed of the Discovery Graben and the Lee Arch. Many Neogene volcanoes are aligned in the north-south direction in the southern VLB, belonging to the McMurdo Volcanic Group. However, due to multiple glaciations and limited seismic data, the volcanic processes are still unclear in the northern VLB, especially in the Terror Rift. Multichannel seismic profiles were collected at the VLB from the 32nd Chinese National Antarctic Research Expedition (CHINARE). We utilized four seismic profiles from the CHINARE and additional historical profiles, along with gravity and magnetic anomalies, to analyze faults and stratigraphic characteristics in the northern Terror Rift and volcanism in the VLB. Negative flower structures found in the northern Terror Rift suggest that the Terror Rift was affected by dextral strike-slip faults extending from the northern Victoria Land (NVL). After the initial orthogonal tension, the rift transited into an oblique extension, forming a set of downward concaving normal faults and accommodation zones in the Terror Rift. On the Lee Arch, several imbricated normal faults formed and converged into a detachment fault. Under gravitational forces, the strata bent upward and formed a rollover anticline. Many deep faults and thin strata subjected to erosion facilitated volcanic activity. A brittle volcanic region in the VLB was affected by dextral strike-slip movements and east-west extension, resulting in two Neogene volcanic chains that connect three igneous provinces in the VLB: the Hallett, Melbourne, and Erebus Provinces. These two chains contain mud volcanoes with magnetic nuclei, volcanic intrusions, and late-stage volcanic eruptions. Volcanisms have brought about opposite polarities of magnetic anomalies in Antarctica, indicating the occurrence of multiple volcanic activities. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Victoria Land Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Ross Sea Victoria Land Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Earth and Planetary Physics 6 0 0 0 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
victoria land basin terror rift seismic stratigraphy gravity and magnetic modeling faulting neogene volcanic intrusion Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 |
spellingShingle |
victoria land basin terror rift seismic stratigraphy gravity and magnetic modeling faulting neogene volcanic intrusion Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 Mei Yue JinYao Gao ChunFeng Li Chao Zhu XinZhi Fan Guochao Wu ZhongYan Shen Han Shi XiaoXian Cai YiDong Guo Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica |
topic_facet |
victoria land basin terror rift seismic stratigraphy gravity and magnetic modeling faulting neogene volcanic intrusion Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 |
description |
The Neogene Terror Rift in the Antarctic Victoria Land Basin (VLB) of the Ross Sea, Antarctica, is composed of the Discovery Graben and the Lee Arch. Many Neogene volcanoes are aligned in the north-south direction in the southern VLB, belonging to the McMurdo Volcanic Group. However, due to multiple glaciations and limited seismic data, the volcanic processes are still unclear in the northern VLB, especially in the Terror Rift. Multichannel seismic profiles were collected at the VLB from the 32nd Chinese National Antarctic Research Expedition (CHINARE). We utilized four seismic profiles from the CHINARE and additional historical profiles, along with gravity and magnetic anomalies, to analyze faults and stratigraphic characteristics in the northern Terror Rift and volcanism in the VLB. Negative flower structures found in the northern Terror Rift suggest that the Terror Rift was affected by dextral strike-slip faults extending from the northern Victoria Land (NVL). After the initial orthogonal tension, the rift transited into an oblique extension, forming a set of downward concaving normal faults and accommodation zones in the Terror Rift. On the Lee Arch, several imbricated normal faults formed and converged into a detachment fault. Under gravitational forces, the strata bent upward and formed a rollover anticline. Many deep faults and thin strata subjected to erosion facilitated volcanic activity. A brittle volcanic region in the VLB was affected by dextral strike-slip movements and east-west extension, resulting in two Neogene volcanic chains that connect three igneous provinces in the VLB: the Hallett, Melbourne, and Erebus Provinces. These two chains contain mud volcanoes with magnetic nuclei, volcanic intrusions, and late-stage volcanic eruptions. Volcanisms have brought about opposite polarities of magnetic anomalies in Antarctica, indicating the occurrence of multiple volcanic activities. |
format |
Article in Journal/Newspaper |
author |
Mei Yue JinYao Gao ChunFeng Li Chao Zhu XinZhi Fan Guochao Wu ZhongYan Shen Han Shi XiaoXian Cai YiDong Guo |
author_facet |
Mei Yue JinYao Gao ChunFeng Li Chao Zhu XinZhi Fan Guochao Wu ZhongYan Shen Han Shi XiaoXian Cai YiDong Guo |
author_sort |
Mei Yue |
title |
Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica |
title_short |
Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica |
title_full |
Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica |
title_fullStr |
Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica |
title_full_unstemmed |
Neogene faulting and volcanism in the Victoria Land Basin of the Ross Sea, Antarctica |
title_sort |
neogene faulting and volcanism in the victoria land basin of the ross sea, antarctica |
publisher |
Science Press |
publishDate |
2022 |
url |
https://doi.org/10.26464/epp2022023 https://doaj.org/article/14618883d8df4ad092ba5eb85c291cc0 |
long_lat |
ENVELOPE(170.217,170.217,-72.317,-72.317) |
geographic |
Antarctic The Antarctic Ross Sea Victoria Land Hallett |
geographic_facet |
Antarctic The Antarctic Ross Sea Victoria Land Hallett |
genre |
Antarc* Antarctic Antarctica Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Victoria Land |
op_source |
Earth and Planetary Physics, Vol 6, Iss 3, Pp 248-258 (2022) |
op_relation |
http://www.eppcgs.org/article/doi/10.26464/epp2022023?pageType=en https://doaj.org/toc/2096-3955 2096-3955 doi:10.26464/epp2022023 https://doaj.org/article/14618883d8df4ad092ba5eb85c291cc0 |
op_doi |
https://doi.org/10.26464/epp2022023 |
container_title |
Earth and Planetary Physics |
container_volume |
6 |
container_issue |
0 |
container_start_page |
0 |
op_container_end_page |
0 |
_version_ |
1766251185045504000 |