In a new paper published in Geochimica et Cosmochimica Acta, Center Assistant Research Scientist Dr. Jemma Davidson and co-authors use the chromium content of FeO-rich olivine to determine the relative degrees of thermal metamorphism for 5 CO (carbonaceous Ornans-like) chondrites from Antarctica.
These include Dominion Range 08006 (DOM 08006), which appears to be a highly primitive CO chondrite of petrologic type 3.00. Its noble gas content, petrography, and mineralogy indicate that DOM 08006 is the most primitive CO chondrite described in the meteoritical literature to date.
Davidson J., Alexander C. M. O’D., Stroud R. M., Busemann H., and Nittler L. R. (2019) Mineralogy and petrology of Dominion Range 08006: A very primitive CO3 carbonaceous chondrite. Geochimica et Cosmochimica Acta 265: 259-278.