3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica
Antarctica is covered by a thick ice sheet, and the application of geophysical methods is necessary to image the subglacial structures for studying the hydrologic systems and tectonic deformations in the Antarctic continent. The magnetotelluric (MT) method is one of the best approaches to obtain the...
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ftmdpi:oai:mdpi.com:/2072-4292/14/3/496/ 2023-09-05T13:15:20+02:00 3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica Enzhao Xiao Feng Jiang Jingxue Guo Khalid Latif Lei Fu Bo Sun agris 2022-01-21 application/pdf https://doi.org/10.3390/rs14030496 EN eng Multidisciplinary Digital Publishing Institute Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs14030496 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 14; Issue 3; Pages: 496 East Antarctica magnetotelluric 3D interpretation the Prydz Bay Chinese Zhongshan Station Text 2022 ftmdpi https://doi.org/10.3390/rs14030496 2023-08-13T23:53:38Z Antarctica is covered by a thick ice sheet, and the application of geophysical methods is necessary to image the subglacial structures for studying the hydrologic systems and tectonic deformations in the Antarctic continent. The magnetotelluric (MT) method is one of the best approaches to obtain the subglacial electrical resistivities. However, only a very small volume of data has been collected so far in Antarctica using this method. In this paper, we report on a broadband MT profile collected at 10 sites in the south of the Chinese Zhongshan Station at Prydz Bay, and a 3D resistivity model was constructed by inversion of these data. This 3D model shows two low resistivity zones at a depth shallower than 6 km. They are consistent with the low-velocity zones in the previous shear-wave model and can be interpreted as the result of interconnected fluids associated with a downward migration of subglacial water. In addition, a distinct eastward dipping low resistivity zoneis present in the crust, which extends from the top surface to the lower crust. Since its location coincides with the highly positive magnetization named Amery Lineament, it is proposed that this eastward dipping low resistivity zoneextending in the entire crust probably reveals the geometry structure of the Amery Lineament at depth. Besides, it can be inferred from this new 3D resistivity model that the Amery Lineament is at least a crustal-scale structure, which probably outcrops on the land surface but was covered by the ice sheets in the study area. Text Antarc* Antarctic Antarctica East Antarctica Ice Sheet Prydz Bay MDPI Open Access Publishing Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Antarctic East Antarctica Prydz Bay The Antarctic Zhongshan ENVELOPE(76.371,76.371,-69.373,-69.373) Zhongshan Station ENVELOPE(76.371,76.371,-69.373,-69.373) Remote Sensing 14 3 496 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
East Antarctica magnetotelluric 3D interpretation the Prydz Bay Chinese Zhongshan Station |
spellingShingle |
East Antarctica magnetotelluric 3D interpretation the Prydz Bay Chinese Zhongshan Station Enzhao Xiao Feng Jiang Jingxue Guo Khalid Latif Lei Fu Bo Sun 3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica |
topic_facet |
East Antarctica magnetotelluric 3D interpretation the Prydz Bay Chinese Zhongshan Station |
description |
Antarctica is covered by a thick ice sheet, and the application of geophysical methods is necessary to image the subglacial structures for studying the hydrologic systems and tectonic deformations in the Antarctic continent. The magnetotelluric (MT) method is one of the best approaches to obtain the subglacial electrical resistivities. However, only a very small volume of data has been collected so far in Antarctica using this method. In this paper, we report on a broadband MT profile collected at 10 sites in the south of the Chinese Zhongshan Station at Prydz Bay, and a 3D resistivity model was constructed by inversion of these data. This 3D model shows two low resistivity zones at a depth shallower than 6 km. They are consistent with the low-velocity zones in the previous shear-wave model and can be interpreted as the result of interconnected fluids associated with a downward migration of subglacial water. In addition, a distinct eastward dipping low resistivity zoneis present in the crust, which extends from the top surface to the lower crust. Since its location coincides with the highly positive magnetization named Amery Lineament, it is proposed that this eastward dipping low resistivity zoneextending in the entire crust probably reveals the geometry structure of the Amery Lineament at depth. Besides, it can be inferred from this new 3D resistivity model that the Amery Lineament is at least a crustal-scale structure, which probably outcrops on the land surface but was covered by the ice sheets in the study area. |
format |
Text |
author |
Enzhao Xiao Feng Jiang Jingxue Guo Khalid Latif Lei Fu Bo Sun |
author_facet |
Enzhao Xiao Feng Jiang Jingxue Guo Khalid Latif Lei Fu Bo Sun |
author_sort |
Enzhao Xiao |
title |
3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica |
title_short |
3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica |
title_full |
3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica |
title_fullStr |
3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica |
title_full_unstemmed |
3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica |
title_sort |
3d interpretation of a broadband magnetotelluric data set collected in the south of the chinese zhongshan station at prydz bay, east antarctica |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/rs14030496 |
op_coverage |
agris |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(76.371,76.371,-69.373,-69.373) ENVELOPE(76.371,76.371,-69.373,-69.373) |
geographic |
Amery Antarctic East Antarctica Prydz Bay The Antarctic Zhongshan Zhongshan Station |
geographic_facet |
Amery Antarctic East Antarctica Prydz Bay The Antarctic Zhongshan Zhongshan Station |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Prydz Bay |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Prydz Bay |
op_source |
Remote Sensing; Volume 14; Issue 3; Pages: 496 |
op_relation |
Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs14030496 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs14030496 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
3 |
container_start_page |
496 |
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1776197139950469120 |