Newsletter |
26,1 |
Location |
Meteorite Hills |
Field Number |
13189 |
Dimensions (cm) |
6.0 x 3.0 x 1.75 |
Weight (g) |
88.84 |
Original Classification |
L3.6 Chondrite |
Updated Classification |
L(LL)3.05 Chondrite |
Pairing |
MET 00452;
MET 00526;
MET 00621;
|
Fayalite (mol%): 10-28;Ferrosilite (mol%): 3-17 |
B |
A/B |
The exterior of these two carbonaceous chondrites has black /brown fusion crust. 489 has polygonal fractures and 621 has a rough, pitted crust. The interiors range from medium gray to black matrix. Both have numerous chondrules. |
These two meteorites, found within 1 km of each other, are so similar that a single description suffices. The sections exhibit numerous large, well-defined chondrules (up to 3 mm) in a matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is extremely abundant. Olivines range from Fa10-31; pyroxenes from Fs3-22. The meteorites are L3 chondrites (estimated subtype 3.6). |
Reclassified as an L/LL3.05 Chondrite based on Cr contents of Type II chondrule olivine. Added to MET 00452 and MET 00526 pairing group based on rcovery location. Righter, K., Schutt, J., Lunning, N., Harvey, R., & Karner, J. (2021a) Identification and pairing reassessment of unequilibrated ordinary chondrites from four Antarctic dense collection areas. Meteoritics & Planetary Science 56, 1556-1578. |
MET 00621 added to the MET 00452/00526 pairing group as discussed in Righter, K., Schutt, J., Lunning, N., Harvey, R., & Karner, J. (2021a) Identification and pairing reassessment of unequilibrated ordinary chondrites from four Antarctic dense collection areas. Meteoritics & Planetary Science 56, 1556-1578. |