Ar-40 - Ar-39 dating of the H3 chondrite Sainte Rose

Details Ar-40 - Ar-39 dating of the H3 chondrite Sainte Rose Ar-40 - Ar-39 dating of the H3 chondrite Sainte Rose

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992metic..27..580s&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 27, no. 5, p. 580-584.

Computer Science

3

Argon Isotopes, Chondrites, Meteoritic Composition, Radioactive Age Determination, Calcium, Grain Size, Neutron Irradiation, Potassium

Scientific paper

A whole rock sample from the H3 chondrite Sainte Rose, which was discovered in 1983, was dated with the Ar-40 - Ar-39 technique. From the K/Ca spectrum and from an analysis of the Ar-39 recoil effect we conclude that this meteorite has at least two distinguishable K-carriers: a low temperature, high-K/Ca, fine-grained carrier with a typical grain size of about 2 microns and a high temperature, low-K/Ca, more coarse-grained carrier. The K-Ar clocks of both were started 4.40 +/- 0.01 Ga ago.

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