Cosmogenic and radiogenic noble gases in the Dhajala chondrite

Details Cosmogenic and radiogenic noble gases in the Dhajala chondrite Cosmogenic and radiogenic noble gases in the Dhajala chondrite

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..36..341g&link_type=abstract

Earth and Planetary Science Letters, vol. 36, no. 2, Sept. 1977, p. 341-346.

Computer Science

5

Chondrites, Gas Analysis, Meteoritic Composition, Rare Gases, Abundance, Chondrule, Cosmic Rays, Mass Spectroscopy, Petrology

Scientific paper

Whole rock and chondrules of the Dhajala chondrite were analyzed for Ne, Ar, Kr and Xe by total melting as well as by stepwise heating techniques. The cosmic ray exposure ages for the whole rock and the chondrules are 6.2 +/- 0.8 and 6.3 +/- 1.0 m.y. as determined by the 21Ne method and 4.8 +/- 1.5 and 4.2 +/- 2.0 m.y. by the 38Ar method, respectively. The K-Ar age of the whole rock is 4.2 +/- 0.4 b.y. The elemental composition of the trapped gas in this chondrite is of ``planetary'' type. The radiogenic 129Xe contents in the whole rock and chondrules are similar and this component is very retentively sited in the chondrules.

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