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Age and composition of Antarctic bedrock reflected by detrital zircons, erratics, and recycled microfossils in the Prydz Bay-Wilkes Land-Ross Sea-Marie Byrd Land sector (70°-240°E)
John J Veevers,Ayesha Saeed +1 more
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TLDR
The age and composition of the 14 × 10 6 ǫ km 2 of Antarctica's surface obscured by ice is unknown except for some dates on detrital minerals as mentioned in this paper.About:
This article is published in Gondwana Research.The article was published on 2011-11-01. It has received 61 citations till now. The article focuses on the topics: Provenance & Basement (geology).read more
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A Change in the Geodynamics of Continental Growth 3 Billion Years Ago
TL;DR: In this paper, the authors identify systematic variations in hafnium and oxygen isotopes in zircons of different ages that reveal the relative proportions of reworked crust and of new crust through time, and a marked decrease in the rate of crustal growth at ~3 billion years ago may be linked to the onset of subduction-driven plate tectonics.
Supporting Online Material for Major Australian-Antarctic Plate Reorganization at Hawaiian-Emperor Bend Time
Joanne M. Whittaker,R. D. Müller,G. Leitchenkov,H. Stagg,M. Sdrolias,C. Gaina,Alexey Goncharov +6 more
TL;DR: In this article, a marked bend in the Hawaiian-Emperor seamount chain supposedly resulted from a recent major reorganization of the plate-mantle system there 50 million years ago.
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A cryptic Gondwana-forming orogen located in Antarctica.
TL;DR: The most poorly exposed and least understood Gondwana-forming orogen lies largely hidden beneath ice in East Antarctica as discussed by the authors, suggesting that the Kuunga orogen sutured provinces of broadly Indian versus Australian affinity.
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S-velocity model and inferred Moho topography beneath the Antarctic Plate from Rayleigh waves
Meijian An,Douglas A. Wiens,Yue Zhao,Mei Feng,Andrew A. Nyblade,Masaki Kanao,Yuansheng Li,Alessia Maggi,Jean Jacques Lévêque +8 more
TL;DR: A 3D S-velocity model for the Antarctic lithosphere was constructed using a single-step surface wave tomographic method, and a Moho depth map was estimated from the model using the derived crustal thicknesses, the average ratio of lithospheric mantle and crustal densities of Antarctica was calculated as mentioned in this paper.
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Reconstructions before rifting and drifting reveal the geological connections between Antarctica and its conjugates in Gondwanaland
TL;DR: A comprehensive review of the U-Pb zircon geochronology of the reconstructed margins of Antarctica and its conjugates shows that certain coeval structures are aligned across the suture.
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Igneous zircon: trace element composition as an indicator of source rock type
TL;DR: In this paper, the concentrations of 26 trace elements have been determined for zircons from a wide range of different rock types and reveal distinctive elemental abundances and chondrite-normalised trace element patterns for specific rock types.