Geology of new localities on Tabarin Peninsula, northern Antarctic Peninsula

• 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

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.