Newsletter |
44,2 |
Location |
Dominion Range |
Field Number |
22257 |
Dimensions (cm) |
10.0 x 6.5 x 5.5 |
Weight (g) |
392.97 |
Original Classification |
CO3 Chondrite |
Updated Classification |
CO3.05 Chondrite |
Fayalite (mol%): 1-45;Ferrosilite (mol%): 1-63 |
Be |
A/B |
The exteriors of these paired meteorites have black/brown fractured fusion crust with weathered areas and evaporites. The interiors are a dark gray to black matrix with some white specks, abundant in some areas and some large white inclusions. Some areas are rusty and weathered. |
These sections consist of abundant small (up to 1 mm) chondrules, chondrule fragments and mineral grains in a dark matrix. Metal and sulfide occur within and rimming the chondrules. Olivine ranges in composition from Fa1-56. Pyroxene analyses range from Fs1-62Wo0-2. The meteorites are CO3 chondrites, probably paired with the DOM 08004/DOM 10101 pairing group. |
Based on Type II (FeO-rich) chondrule olivine Cr content, this sample has been reclassified to CO3.05 chondrite. Details are reported in Righter, K. et al. (2024) Pairing relations within CO3 chondrites recovered at the Dominion Range and Miller Range, Transantarctic mountains: Constraints from chondrule olivines, noble gas, and H, C, N bulk and isotopic compositions. Meteoritics and Planetary Science 59; https://doi.org/10.1111/maps.14146. |