Sample Petrographic Description
Sample Number | MIL 11111 |
Newsletter | 35,2 |
Location | Miller Range |
Field Number | 23259 |
Dimensions (cm) | 5.0 x 3.5 x 2.75 |
Weight (g) | 41.90 |
Original Classification | CM1/2 Chondrite |
Pairing | MIL 090288; MIL 090986; MIL 090992; MIL 090993; MIL 11111; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-2 | |
Weathering | |
Ce | |
Fracturing | |
C | |
Macroscopic Description - Kathleen McBride | |
The exteriors are covered with a purplish black fusion crust with polygonal fractures and some evaporites. The exposed interior is black. The interiors are a black matrix with evaporites along fractures. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Nicole Lunning | |
These sections are similar enough that one description is sufficient. The sections consist of a few small chondrules (up to 0.5 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa0-2, no pyroxene grains were analyzed. Aqueous alteration of the matrix is substantial. These meteorites are CM1-2 chondrites, possibly paired with the MIL 090986 series reported in the Spring 2012 newsletter. |
Antarctic Meteorite Images for Sample MIL 11111 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 11111 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL11111 | |
Dyar, M.D., Wallace, S.M., Burbine, T.H., and Sheldon, D.R., 2023, A machine learning classification of meteorite spectra applied to understanding asteroids. Icarus, 406, 115718, https://doi.org/10.1016/j.icarus.2023.115718. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |