Newsletter |
33,1 |
Location |
Miller Range |
Field Number |
17987 |
Dimensions (cm) |
1.25 x 1.25 x 0.5 |
Weight (g) |
0.98 |
Original Classification |
CV3 Chondrite |
Updated Classification |
CV 3.6 Chondrite Reduced |
Pairing |
MIL 07597;
MIL 07697;
MIL 090354;
MIL 090444;
|
Fayalite (mol%): 3-64;Ferrosilite (mol%): 1 |
B |
B |
The exteriors of these carbonaceous chondrites have brown/black fusion crust with polygonal fractures. The interiors of these meteorites have dark gray to black matrixes with some weathered areas. Most have white and light gray chondrules and inclusions. 07669 has mint green colored evaporates over half of its surface. |
The sections are so similar that a single description suffices. The sections exhibit large chondrules (up to 3 mm) and CAIs in a dark matrix. Olivines range from Fa0-64 and low-Ca pyroxene is Fs1-5. The meteorites are unequilibrated carbonaceous chondrites, probably reduced CV3. These are likely paired with the MIL 07671 pairing group previously reported. Pairing of MIL 07690 and MIL 07683 is considered tentative, as the former is dominated by fusion crust and the latter, while similar to other members of the group, lacks metal grains in the thin section examined. |
Reclassification and pairing based on magnetic susceptibility and location proximal to other CV Reduced 3.6 from the middle MIL icefield. Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |