Computer Science
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000lpico.997...64n&link_type=abstract
Workshop on Extraterrestrial Materials from Cold and Hot Deserts, p. 64
Computer Science
Antarctic Regions, Meteorites, Beryllium Isotopes, Calcium Isotopes, Carbon 14, Radioactive Isotopes, Chronology, Chlorine, Half Life, Exposure, Cosmology, Weathering
Scientific paper
We are continuing our ongoing study of cosmogenic nuclides in Antarctic meteorites. In addition to the studies of exposure histories of meteorites, we study terrestrial ages and pairing of Antarctic meteorites and desert meteorites. Terrestrial ages of Antarctic meteorites provide information on meteorite accumulation mechanisms, mean weathering lifetimes, and influx rates. The determination of Cl-36 (half-life=3.01 x 105 y) terrestrial ages is one of our long-term on-going projects, however, in many instances neither Cl-36 or C-14 (5,730 y) yields an accurate terrestrial age. Using Ca-41 (1.04 x 105 y) for terrestrial age determinations solves this problem by filling the gap in half-life between C-14 and Cl-36 ages. We are now applying the new Ca-41 - Cl-36 terrestrial age method as well as the Cl-36 - Be-10 method to Antarctic meteorites. Our measurements and C-14 terrestrial age determinations by the University of Arizona group are always complementary.
Caffee Marc W.
Nishiizumi Kuni
Welten Kees C.
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