Pairing Relations of the CO3 Chondrites Recovered at the Dominion Range, Transantarctic Mountains

Fourteen CO3 chondrites have been recovered in the Dominion Range (DOM) dense collection area of the Transantarctic Mtns by ANSMET teams during the 2008-09, 2010-11, and 2014-15 seasons [1-3]. DOM 08006, one of the largest masses, has been studied extensively and is recognized to be a very primitive unmetamor-phosed sample of great value to planetary science [4]. Studies of pre-solar grains, organics, chondrules, inclusions, and matrix have revealed a rich scientific treasure helping to constrain the conditions in the early solar system (e.g., [4-8]). Many of the masses paired with this sample are significant, yet the pairing has been called into question due to the finding that DOM 08004 seems less primitive than DOM 08006 [5]. Because of the significant masses involved, and the great scientific value of DOM 08006, we have undertaken a detailed assessment of the pairing using field relations, macroscopic observations, petrography, and olivine compositions.