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Niemeyer 1985
Niemeyer, S. (1985). Systematics of Ti isotopes in carbonaceous chondrite whole-rock samples. Geophysical Research Letters 12: doi: 10.1029/GL012i010p00733. issn: 0094-8276.

Titanium isotopic compositions in whole-rock samples are reported for meteorites from all four carbonaceous chondrite classes. Characteristic isotopic patterns are derived for each class, since meteorite in a given class usually, though not always, give the same pattern. No anomalies are resolved at the 47/46 and 48/46 ratios, but small 50 excesses are prevalent [ϵ(50/46) mean values are CI=+1.0¿0.8; CM=+2.4¿0.6; CO=+3.0¿0.5; CV=+3.3¿0.5>. Among the three classes where Ti anomalies are clearly present, the mean values for the 50 excesses are the same within the uncertainties. In contrast, the CI class gives just a hint of a 50 excess. Available data, including analyses of Murchison (CM) density separates, suggest that anomalous Ti is not confined to phases in refractory inclusions. Kakangari, a petrologically and chemically peculiar meteorite, shows a clear deficit of 50, thereby supporting a previous suggestion that it is a unique carbonaceous chondrite.

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Geophysical Research Letters
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American Geophysical Union
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