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Geology of new localities on Tabarin Peninsula, northern Antarctic Peninsula

Published online by Cambridge University Press:  27 April 2004

Rodolfo A. Del Valle ,
Jorge R. Morelli  and
Carlos A. Rinaldi
Rodolfo A. Del Valle
Affiliation:
Instituto Antártico Argentino, Cerrito 1248, C1010AAZ Buenos Aires, Argentina
Jorge R. Morelli
Affiliation:
Instituto Antártico Argentino, Cerrito 1248, C1010AAZ Buenos Aires, Argentina
Carlos A. Rinaldi
Affiliation:
Instituto Antártico Argentino, Cerrito 1248, C1010AAZ Buenos Aires, Argentina
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Abstract

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New outcrops of Hope Bay Formation and Larsen Basin rocks have been exposed by recent ice-retreat on Tabarin Peninsula, northern Antarctic Peninsula. Quartzose, very low-grade metasedimentary rocks, cropping out at Balegno Nunatak (63°28′53″S, 57°00′31″W) are assigned to the Permian–Triassic Hope Bay Formation, and dioritic rocks are assigned to the Antarctic Peninsula batholith. Sedimentary rocks exposed at Rubulis Nunatak (63°30′52″S, 57°07′29′W) closely resemble Lower Cretaceous sedimentary rocks cropping out at nearby Troilo Nunatak, western Tabarin Peninsula. These rocks are correlated with the lower Gustav Group (?Barremian–Coniacian) of the Larsen Basin. This new record confirs that the Larsen Basin extends over southern Tabarin Peninsula, where basin sediments are thought to be faulted against sediments of the Antarctic Peninsula magmatic arc.

Keywords

GondwanaLarsen Basinnorthern Antarctic PeninsulaTabarin Peninsula
Type
Papers—Earth Sciences and Glaciology
Information
Antarctic Science , Volume 13 , Issue 3 , September 2001 , pp. 323 - 328
Copyright
© Antarctic Science Ltd 2001