3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica

Enzhao,Xiao1; Feng,Jiang2,3; Jingxue,Guo1; Khalid,Latif4; Lei,Fu3; Bo,Sun1

2022-01-21

10.3390/rs14030496

Remote Sensing   影响因子和分区

2072-4292

2072-4292

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.

East Antarctica magnetotelluric 3D interpretation the Prydz Bay Chinese Zhongshan Station

SCI

英语

其他

National Key R&D Program of China[2019YFC1509102] ; Shanghai Sailing Program[21YF1452100] ; National Natural Science Foundation of China[42104064]

Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology

Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology

WOS:000810866300001

MDPI AG

人工提交

1.Key Laboratory for Polar Science, MNR, Polar Research Institute of China, Shanghai 200136, China
2.Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen 518055, China
4.National Centre of Excellence in Geology, University of Peshawar, Peshawar 25130, Pakistan

Enzhao,Xiao,Feng,Jiang,Jingxue,Guo,et al. 3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica[J]. Remote Sensing,2022,14(3):496.

Enzhao,Xiao,Feng,Jiang,Jingxue,Guo,Khalid,Latif,Lei,Fu,&Bo,Sun.(2022).3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica.Remote Sensing,14(3),496.

Enzhao,Xiao,et al."3D Interpretation of a Broadband Magnetotelluric Data Set Collected in the South of the Chinese Zhongshan Station at Prydz Bay, East Antarctica".Remote Sensing 14.3(2022):496.