87Rb/87Sr study of diogenites

Details 87Rb/87Sr study of diogenites 87Rb/87Sr study of diogenites

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981e%26psl..55..116b&link_type=abstract

Earth and Planetary Science Letters, Volume 55, Issue 1, p. 116-122.

Computer Science

9

Scientific paper

The five diogenites, Johnstown, Roda, Ellemeet, Shalka and Tatahouine, give scattered data in the 87Rb/86Sr, 87Sr/86Sr diagram. This can result from a disturbance which occurred later than 4.45 Ga ago. However, it is shown that if samples of sufficient size were analyzed, there meteorites could plot on the eucrite isochron and are thereby in agreement with a genetic relation between eucrites, howardites and diogenites. The age of eucrite differentiation from diogenites has been computed using data from the two families yielding an age of 4.47+/-0.1 Ga (2σ) (λ=1.42×10-11 a-1), the initial 87Sr/86Sr ratio being BABI.

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