New constraints on the age and evolution of the Wishbone Ridge, southwest Pacific Cretaceous microplates, and Zealandia-West Antarctica breakup

• Published in: Geology
• Main Authors: Mortimer, N., Hoernle, Kaj A., Hauff, Folkmar, Palin, J. M., Dunlap, W. J., Werner, R., Faure, K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: GSA, Geological Society of America 2006
• Subjects: Pacific; West Antarctica; Wishbone Ridge; Antarc*; Antarctica
• Online Access: https://oceanrep.geomar.de/id/eprint/6002/; https://oceanrep.geomar.de/id/eprint/6002/1/Mortimer.pdf; http://www.gsajournals.org/gsaonline/?request=get-abstract&doi=10.1130%2FG22168.1; https://doi.org/10.1130/G22168.1

We present analytical results from four dredge locations across the eastern Zealandia continental margin and adjacent ocean crust. The 115 Ma dacites dredged from the West Wishbone Ridge (WWR) are isotopically primitive, weakly adakitic, slab-derived lavas. The 97 Ma A-type granites and a basalt fro...