The age and stratigraphy of fore-arc magmatism on Alexander Island, Antarctica

• Published in: Geological Magazine
• Main Authors: MCCARRON, JOE J., MILLAR, IAN L.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1997
• Subjects: Geology; Antarctic; The Antarctic; Antarctic Peninsula; Alexander Island; Rouen; Colbert; Rouen Mountains; Elgar Uplands; Colbert Mountains; Finlandia Foothills; Monteverdi Peninsula; Antarc*; Antarctica
• Online Access: http://dx.doi.org/10.1017/s0016756897007437; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756897007437

Fore-arc magmatic sequences associated with high Mg number andesite lavas unconformably overlie LeMay Group accretionary complex in Alexander Island. High-resolution 40 Ar/ 39 Ar, U–Pb zircon, fission track and K–Ar ages demonstrate that subduction-related fore-arc magmatism migrated northwards alon...