Newsletter |
33,1 |
Location |
Miller Range |
Field Number |
18322 |
Dimensions (cm) |
3.5 x 3.5 x 1.0 |
Weight (g) |
16.45 |
Original Classification |
CV3 Chondrite |
Updated Classification |
CV 3.7 Chondrite Oxidized A |
Pairing |
MIL 07590;
MIL 07002;
MIL 07385;
MIL 07403;
MIL 07669;
MIL 07671;
MIL 07678;
MIL 07681;
MIL 07683;
MIL 07684;
MIL 07685;
MIL 07686;
MIL 07690;
MIL 07691;
MIL 07694;
MIL 07696;
MIL 07698;
MIL 07699;
MIL 090072;
MIL 090170;
MIL 090171;
MIL 090172;
MIL 090173;
MIL 090174;
MIL 090175;
MIL 090176;
MIL 090177;
MIL 090178;
MIL 090179;
MIL 090184;
MIL 091010;
MIL 11206;
MIL 15306;
|
Fayalite (mol%): 0-46;Ferrosilite (mol%): 1 |
Ce |
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 Raman spectroscopy (petrologic type 3.7), and on Ni content of metal and sulfide and magnetic susceptibility (Oxidized A). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |