Geophysical Evidence of the Collisional Suture Zone in the Prydz Bay, East Antarctica

Fu，Lei1; Guo，Jingxue2; Shen，Weisen3; Wang，Xin4; Liu，Xiaochun5; Chen，Xiaofei6; Hu，Xiangyun1

2024-01-28

10.1029/2023GL106229

Geophysical Research Letters   影响因子和分区

0094-8276

1944-8007

The location and origin of Neoproterozoic-Cambrian sutures provide keys to understand the formation and evolution of the supercontinent Gondwana. The Larsemann Hills is located near a major Neoproterozoic-Cambrian suture zone in the Prydz Belt, but has not been examined locally by comprehensive geophysical studies. In this study, we analyzed data collected from a one-dimensional (1D) joint seismic-MT array deployed during the 36th Chinese National Antarctic Research Expedition. We found that a sharp Moho discontinuity offset of 6–8 km shows up in the stacked image of teleseismic P-wave receiver function analysis; coinciding with the abrupt Moho offset, a near-vertical channel with (a) low resistivity extending to the uppermost mantle depths, and (b) high crustal Poisson's ratio in the crust is identified. These findings provide evidence for the determination of the location and collisional nature of the Prydz belt or a portion of it.

Larsemann Hills magnetotellurics nodal seismic array prydz belt receiver function

SCI ; EI

英语

其他

GEOSCIENCES

2-s2.0-85182636495

Scopus

1.Hubei Subsurface Multiscale Imaging Key Laboratory,School of Geophysics and Geomatics,China University of Geosciences,Wuhan,China
2.Key Laboratory for Polar Science,MNR,Polar Research Institute of China,Shanghai,China
3.Department of Geosciences,Stony Brook University,Stony Brook,United States
4.Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China
5.Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing,China
6.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,China

Fu，Lei,Guo，Jingxue,Shen，Weisen,et al. Geophysical Evidence of the Collisional Suture Zone in the Prydz Bay, East Antarctica[J]. Geophysical Research Letters,2024,51(2).

Fu，Lei.,Guo，Jingxue.,Shen，Weisen.,Wang，Xin.,Liu，Xiaochun.,...&Hu，Xiangyun.(2024).Geophysical Evidence of the Collisional Suture Zone in the Prydz Bay, East Antarctica.Geophysical Research Letters,51(2).

Fu，Lei,et al."Geophysical Evidence of the Collisional Suture Zone in the Prydz Bay, East Antarctica".Geophysical Research Letters 51.2(2024).