Cosmogenic Be-10, Al-26, and He-3 in olivine from Maui lavas

Details Cosmogenic Be-10, Al-26, and He-3 in olivine from Maui lavas Cosmogenic Be-10, Al-26, and He-3 in olivine from Maui lavas

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990e%26psl..98..263n&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 98, no. 3-4, June 1990, p. 263-266. Research supported by NASA and NS

Physics

10

Aluminum Isotopes, Beryllium Isotopes, Helium Isotopes, Lava, Olivine, Cosmic Rays, Earth Surface, Geomorphology, Soil Erosion

Scientific paper

This paper reports the presence of cosmogenic Be-10 and Al-26 in olivines from the Maui Haleakala basalts in which cosmogenic He-3 and Ne-21 were discovered. Based on production-rate calibrations in quartz crystals from late Pleistocene granite exposures in the Sierra Nevada, the Haleakala crater erosion rates derived from Be-10 and Al-26 concentrations agree within 10 percent and give a mean rate of 12 m/Myr, about 40 percent greater than the rate of 8.5 m/Myr previously derived from He-3 measurements. These results establish the feasibility of the simultaneous use of radioactive and stable cosmogenic nuclides for studies of exposure-ages and erosion-rates in basaltic and andesitic terrains.

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