Newsletter |
27,3 |
Location |
Pecora Escarpment |
Field Number |
13633 |
Dimensions (cm) |
3.0 x 1.5 x 1.5 |
Weight (g) |
9.78 |
Original Classification |
CM2 Chondrite |
Pairing |
PCA 02011;
PCA 02010;
PCA 02012;
PCA 02050;
|
Fayalite (mol%): 0-40 |
B |
A |
Thick, ropey, black fusion crust covers the surface of this carbonaceous chondrite. The black matrix has mm sized light colored chondrules. |
The section consists of a few small chondrules (up to 1 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa0-40, with a peak at Fa0-2. The matrix consists dominantly of an Fe-rich serpentine; chondrules are relatively unaltered. The meteorite is a CM2 chondrite and pairing with PCA 02011/02012 is likely. |
PCA 02010 and PCA 02012 (the latter paired with PCA 02011 and PCA 02050) were initially announced as CM2 chondrites in two different AMN vol. 26, no. 2 and vol. 27, no. 1, but not considered together. Studies since then have revealed that they have the same CRE age (1.2 Ma), similar petrography (Zolensky et al., 2021), and are very closely associated. Given this data we can confidently add PCA 02010 to the PCA 02011 pairing group. |