Geochronology of Cretaceous granites and metasedimentary basement on Edward VII Peninsula, Marie Byrd Land, West Antarctica

• Published in: Antarctic Science
• Main Authors: Adams, C.J., Seward, D., Weaver, S.D.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1995
• Subjects: Alexandra Mountains; Byrd; Campbell Plateau; Edward VII Peninsula; Marie Byrd Land; New Zealand; Pacific; Rockefeller Mountains; West Antarctica; Antarc*; Antarctic Science; Antarctica
• Online Access: http://dx.doi.org/10.1017/s095410209500037x; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410209500037X

Rb-Sr ages of Swanson Formation on Edward VII Peninsula, West Antarctica, indicate a late Ordovician age, 421–432 Ma for regional metamorphism. K-Ar ages of 113–440 Ma, reflect a second thermal metamorphism during emplacement of widespread Cretaceous granites. Rb-Sr ages of five monzogranite/syenogr...