The accumulation of cosmogenic chlorine-36 in rocks - A method for surface exposure dating

Details The accumulation of cosmogenic chlorine-36 in rocks - A method for surface exposure dating The accumulation of cosmogenic chlorine-36 in rocks - A method for surface exposure dating

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986sci...231...41p&link_type=abstract

Science (ISSN 0036-8075), vol. 231, Jan. 3, 1986, p. 41-43. Research supported by Associated Western Universities.

Computer Science

44

Chlorine, Cosmic Rays, Geochronology, Petrology, Radioactive Age Determination, Igneous Rocks, Isotopes, Long Term Effects

Scientific paper

Because of the reaction of cosmic rays with elements in minerals, chlorine-36 accumulates in rocks exposed at the earth's surface. This suggests that the ratio of chlorine-36 to stable chloride can be used as a geochronometer. Reasonable agreement has been obtained between measurements of chlorine-36 in volcanic rocks of known age and calculations of chlorine-36 production based on rock composition and cosmic-ray flux. The buildup of chlorine-36 should be a useful means for measuring the surface exposure time of young volcanic rocks and geomorphic features in the age range of one thousand to one million years.

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