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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 (36–53 ka) determined from co-existing cosmogenic 21 Ne and 3 He in olivines separated from basalts are consistent within analytical uncertainties with ages previously determined by cosmogenic 36 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 or 40 Ar/ 39 Ar dating. The present study demonstrates that combined cosmogenic 3 He and 21 Ne dating, specifically measured cosmogenic 3 He/ 21 Ne ratios, on the same samples, is powerful for evaluating the validity of calculated cosmogenic 3 He and 21 Ne surface exposure ages. |
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