The significance of mid-Palaeozoic basement in Graham Land, Antarctic Peninsula

• Published in: Journal of the Geological Society
• Main Authors: Milne, A.J., Millar, I.L.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Geological Society of London 1989
• Subjects: Earth Sciences; Antarctic; The Antarctic; Antarctic Peninsula; Graham Land; Antarc*
• Online Access: http://nora.nerc.ac.uk/id/eprint/521266/; https://doi.org/10.1144/gsjgs.146.2.0207

A mid-Palaeozoic basement to the Antarctic Peninsula is confirmed by a geochronological study of the gneissose country rock of the Mesozoic magmatic arc of eastern Graham Land. Rb–Sr whole-rock ages of 410 ± 15 and 426 ± 12 Ma from samples of orthogneiss indicate a previously unrecognized episode of...