Publication Date:
2019-07-12
Description:
Cosmogenic helium contents in a suite of Hawaiian radiocarbon-dated lava flows were measured to study the use of the production rate of spallation-produced cosmogenic He-3 as a surface exposure chronometer. Basalt samples from the Mauna Loa and Hualalai volcanoes were analyzed, showing that exposure-age dating is feasible in the 600-13000 year age range. The data suggest a present-day sea-level production rate in olivine of 125 + or - 30 atoms/g yr.
Keywords:
GEOPHYSICS
Type:
Earth and Planetary Science Letters (ISSN 0012-821X); 97; 2-Jan; 177-189
Format:
text
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