||3.3 x 3.0 x 2.3
|Fayalite (mol%): 0-60
|Exterior has black/brown fractured fusion crust with oxidation. Areas without fusion crust reveal a black matrix with light inclusions/chondrules. The interior is very similar to DOM 19170, black matrix with oxidation and light/weathered inclusions/chondrules. Some evaporites are present.
|The sections consist of abundant small (up to 1 mm) chondrules, chondrule fragments, CAIs, and mineral grains in a dark matrix. Metal and sulfide occur within and rimming the chondrules. Olivine ranges in composition from Fa0-60. Pyroxene analyses range from Fs0-33. Terrestrial weathering effects are modest. Meteorites are similar enough that one description suffices, and they are likely paired. The meteorites are CO3 chondrites and may be members of the larger Dominion Range CO3 pairing group (named for DOM 08004).
|Comparison of DOM 03238 to many of these samples reveals that it has the same CRE age, Type II chondrule olivine Cr2O3 contents, and H, C, and N elemental and isotopic compositions. Initially thought to have a high magnetite component, its mode is only slightly higher than that measured in a number of DOM 08004 pairing group CO3s (Rubin and Li, 2019). Given all this new information, we reclassify DOM 03238 as a CO3, and add it to the DOM 08004 pairing group. Data supporting this new pairing update for DOM CO3 chondrites were presented in Righter et al. (2021, 2022, 2023) and Rubin and Li (2019).