1. Cosmogenic 21Ne exposure dating of young basaltic lava flows from the Newer Volcanic Province, western Victoria, Australia.
- Author
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Gillen, D., Honda, M., Chivas, A.R., Yatsevich, I., Patterson, D.B., and Carr, P.F.
- Subjects
COSMOGENIC nuclides ,BASALT ,LAVA flows ,VOLCANIC eruptions ,GEOCHRONOMETRY ,NEON isotopes ,VOLCANIC ash, tuff, etc. - Abstract
Abstract: Cosmogenic
21 Ne was utilised to determine exposure ages of young subaerial basaltic lava flows from the Newer Volcanic Province, western Victoria, Australia. The ages (36–53ka) determined from co-existing cosmogenic21 Ne and3 He in olivines separated from basalts are consistent within analytical uncertainties with ages previously determined by cosmogenic36 Cl exposure dating. This paper illustrates the potential of cosmogenic neon exposure ages in studying the eruption, surface morphology, and erosion history of young volcanic rocks, which are difficult to date using other conventional methods, such as K-Ar or40 Ar/39 Ar dating. The present study demonstrates that combined cosmogenic3 He and21 Ne dating, specifically measured cosmogenic3 He/21 Ne ratios, on the same samples, is powerful for evaluating the validity of calculated cosmogenic3 He and21 Ne surface exposure ages. [Copyright &y& Elsevier]- Published
- 2010
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