Geology of new localities on Tabarin Peninsula, northern Antarctic Peninsula

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 Ba...

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Bibliographic Details
Published in:Antarctic Science
Main Authors: Valle, Rodolfo A. Del, Morelli, Jorge R., Rinaldi, Carlos A.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2001
Subjects:
Antarctic
Antarctic Peninsula
Hope Bay
Larsen Basin
Tabarin peninsula
The Antarctic
Antarc*
Antarctic Science
Online Access:http://dx.doi.org/10.1017/s0954102001000451
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102001000451
Description
Summary: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.

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