Computer Science
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.2941n&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, Dec. 1988, p. 2941-2954.
Computer Science
7
Carbonaceous Chondrites, Chondrule, Solar System, Titanium Isotopes, Abundance, Aluminum, Anomalies, Calcium, Interplanetary Dust, Metal Oxides
Scientific paper
Average Ti isotopic patterns were derived for each class of carbonaceous chondrites from a chemically characterized suite of whole-rock samples. The results obtained showed excesses of Ti-50 in all four classes; in particular, a well-resolved excess of Ti-50 was found in a subset of CI meteorites. Mean values of the T-50 excess for the four classes span a range of only 2 epsilon-units, with an apparent positive correlation with Al content. The Ca-Al-rich inclusions (CAIs) consistently gave Ti-excesses of about 10 epsilon-units. The larger anomalies in CAIs, compared to matrix and most chondrules, are attributed primarily to an open-system rather than a closed-system processing of the CAI precursors.
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