Charnockite composition in relation to the tectonic evolution of East Antarctica

2006 ◽  
Vol 9 (4) ◽  
pp. 379-397 ◽  
Author(s):  
E.V. Mikhalsky ◽  
J.W. Sheraton ◽  
K. Hahne
Keyword(s):  
Tectonic Evolution ◽  
East Antarctica

scholarly journals The Main Shear Zone in Sør Rondane, East Antarctica: Implications for the late-Pan-African tectonic evolution of Dronning Maud Land

Tectonics ◽  
2015 ◽  
Vol 34 (6) ◽  
pp. 1290-1305 ◽  
Author(s):  
Antonia S. Ruppel ◽  
Andreas Läufer ◽  
Joachim Jacobs ◽  
Marlina Elburg ◽  
Nicole Krohne ◽  
...  
Keyword(s):  
Shear Zone ◽  
Tectonic Evolution ◽  
East Antarctica ◽  
Pan African ◽  
Dronning Maud Land

Overview of West Antarctic tectonic evolution from ~500 Ma to the present

2021 ◽  
Author(s):  
Tom Jordan ◽  
Teal Riley ◽  
Christine Siddoway
Keyword(s):  
Tectonic Evolution ◽  
Weddell Sea ◽  
East Antarctica ◽  
Rift System ◽  
West Antarctica ◽  
The West ◽  
Magmatic Arc ◽  
West Antarctic ◽  
The Pacific ◽  
Tectonically Active

<p>West Antarctica developed as the tectonically active margin separating East Antarctica and the Pacific Ocean for almost half a billion years. Its dynamic history of magmatism, continental growth and fragmentation are recorded in sparse outcrops, and revealed by regional geophysical patterns. Compared with East Antarctica, West Antarctica is younger, more tectonically active and has a lower average elevation. We identify three broad physiographic provinces within West Antarctica and present their overlapping and interconnected tectonic and geological history as a framework for future study: 1/ The Weddell Sea region, which lay furthest from the subducting margin, but was most impacted by the Jurassic initiation of Gondwana break-up. 2/ Marie Byrd Land and the West Antarctic rift system which developed as a broad Cretaceous to Cenozoic continental rift system, reworking a former convergent margin. 3/ The Antarctic Peninsula and Thurston Island which preserve an almost complete magmatic arc system. We conclude by briefly discussing the evolution of the West Antarctic system as a whole, and the key questions which need to be addressed in future. One such question is whether West Antarctica is best conceived as an accreted collection of rigid microcontinental blocks (as commonly depicted) or as a plastically deforming and constantly growing melange of continental fragments and juvenile magmatic regions. This distinction is fundamental to understanding the tectonic evolution of young continental lithosphere. Defining the underlying geological template of West Antarctica and constraining its linkages to the dynamics of the overlying ice sheet, which is vulnerable to change due to human activity, is of critical importance.</p>

Crustal structure and tectonic evolution of Enderby Land, East Antarctica, as revealed by deep seismic surveys

2014 ◽  
Vol 627 ◽  
pp. 38-47 ◽  
Author(s):  
Masaki Kanao ◽  
Vladimir D. Suvorov ◽  
Mikiya Yamashita ◽  
Boris Mishenkin
Keyword(s):  
Crustal Structure ◽  
Tectonic Evolution ◽  
East Antarctica ◽  
Seismic Surveys
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