Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1225s&link_type=abstract
Lunar and Planetary Science, volume 27, page 1225
Other
Chronology, Isotopes, Osmium, Rhenium
Scientific paper
Here we report results of Re-Os isotope analyses of a suite of Cape York individuals (Agpalilik, Savik I, Thule, and Woman) along with other IIIAB members close in chemical composition to Cape York (Casas Grandes, Loreto, and Trenton). The IIIAB parent core had complicated crystallization history which cannot be described solely by fractional crystallization (e.g., scatter in Ni-Ir data along theoretical crystallization trends is much wider than analytical uncertainties). Meteorites from the Cape York shower demonstrate anomalous behavior for many trace elements, probably reflecting other major process. The high iridium part of the group IIIA irons (presumably representing the central part of the parent IIIAB core) was precisely dated by Re-Os method in this lab. Consequently, the aim of the present study is to decipher the chronology of the Cape York irons relative to the IIIA isochron and to obtain precise Re-Os composition data in order to place additional constraints on conceivable models on the history of the IIIAB parental core.
Morgan John W.
Smoliar Michael I.
Walker Ray J.
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