What is it about?
The Late Mesozoic stocks composed of alkaline-ultramafic rocks in the northern Prince Charles Mountains (East Antarctica) contain xenogenic zircon entrained during magma ascent to the surface providing the only evidence for the age of sub-surface crustal horizons.
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Why is it important?
The captured zircons display a range of ages from ca 2700 Ma to ca 300-230 Ma with most pronounced ages of ca 900-800 Ma and ca 660-500 Ma. These data indicate that the presently exposed rock association in the northern Prince Charles Mountains is underlain by differing geological unit(s). The presence of ca 900-800 Ma and ca 600−500 Ma xenogenic zircons argues for a post-1000 Ma orogeny, which may be the Kuunga-age collisional episode.
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This page is a summary of: The age of continental crust in the northern Prince Charles mountains (East Antarctica) as evidenced by zircon xenocrysts from cretaceous alkaline-ultramafic rocks, Lithos, September 2020, Elsevier, DOI: 10.1016/j.lithos.2020.105599.
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