Boron- and phosphate-rich rocks in the Larsemann Hills, Prydz Bay, East Antarctica: tectonic implications

2013 ◽  
Vol 383 (1) ◽  
pp. 73-94 ◽  
Author(s):  
Edward S. Grew ◽  
Christopher J. Carson ◽  
Andrew G. Christy ◽  
Steven D. Boger
Keyword(s):  
East Antarctica ◽  
Prydz Bay ◽  
Larsemann Hills ◽  
Tectonic Implications

Monazite petrochronology of polymetamorphic granulite‐facies rocks of the Larsemann Hills, Prydz Bay, East Antarctica

2021 ◽  
Author(s):  
Steven K. Spreitzer ◽  
Jesse B. Walters ◽  
Alicia Cruz‐Uribe ◽  
Michael L. Williams ◽  
Martin G. Yates ◽  
...  
Keyword(s):  
Granulite Facies ◽  
East Antarctica ◽  
Prydz Bay ◽  
Larsemann Hills

Imaging the Ice Sheet and Uppermost Crustal Structures with a Dense Linear Seismic Array in the Larsemann Hills, Prydz Bay, East Antarctica

2021 ◽  
Author(s):  
Lei Fu ◽  
Jingxue Guo ◽  
Junlun Li ◽  
Bao Deng ◽  
Guofeng Liu ◽  
...  
Keyword(s):  
High Resolution ◽  
Ice Sheet ◽  
Velocity Model ◽  
Dispersion Curves ◽  
Body Waves ◽  
East Antarctica ◽  
Prydz Bay ◽  
Larsemann Hills ◽  
Geophysical Surveys ◽  
Short Period

Abstract Comprehensive geophysical surveys including magnetotelluric, seismic, and aerial gravity–magnetic surveys are essential for understanding the history of Antarctic tectonics. The ice sheet and uppermost structure derived from those geophysical methods are relatively low resolution. Although ice-penetrating radar can provide high-resolution reflectivity images of the ice sheet, it cannot provide constraints on subice physical properties, which are important for geological understanding of the Antarctic continent. To obtain high-resolution images of the ice sheet and uppermost crustal structure beneath the Larsemann Hills, Prydz Bay, East Antarctica, we conduct an ambient noise seismic experiment with 100 short-period seismometers spaced at 0.2 km intervals. Continuous seismic waveforms are recorded for one month at a 2 ms sampling rate. Empirical Green’s functions are extracted by cross correlating the seismic waveform of one station with that of another station, and dispersion curves are extracted using a new phase-shift method. A high-resolution shear-velocity model is derived by inverting the dispersion curves. Furthermore, body waves are enhanced using a set of processing techniques commonly used in seismic exploration. The stacked body-wave image clearly shows a geological structure similar to that revealed by the shear-wave velocity model. This study, which is the first of its kind in Antarctica, possibly reveals a near-vertical intrusive rock covered by an ice sheet with a horizontal extent of 4 km. Our results help to improve the understanding of the subice environment and geological evolution in the Larsemann Hills, Prydz Bay, East Antarctica.

Ultramafic to mafic granulites from the Larsemann Hills, East Antarctica: Geochemistry and tectonic implications

2017 ◽  
Vol 145 ◽  
pp. 679-690 ◽  
Author(s):  
Laixi Tong ◽  
Bor-ming Jahn ◽  
Xiaohan Liu ◽  
Xirong Liang ◽  
Yi-gang Xu ◽  
...  
Keyword(s):  
East Antarctica ◽  
Larsemann Hills ◽  
Tectonic Implications

New constraints from U–Pb, Lu–Hf and Sm–Nd isotopic data on the timing of sedimentation and felsic magmatism in the Larsemann Hills, Prydz Bay, East Antarctica

2012 ◽  
Vol 206-207 ◽  
pp. 87-108 ◽  
Author(s):  
Edward S. Grew ◽  
Christopher J. Carson ◽  
Andrew G. Christy ◽  
Roland Maas ◽  
Greg M. Yaxley ◽  
...  
Keyword(s):  
East Antarctica ◽  
Prydz Bay ◽  
Isotopic Data ◽  
Larsemann Hills
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