Sample Petrographic Description
Sample Number | MIL 07259 |
Newsletter | 34,1 |
Location | Miller Range |
Field Number | 18332 |
Dimensions (cm) | 2.0 x 1.5 x 0.5 |
Weight (g) | 3.51 |
Original Classification | Acapulcoite/Lodranite |
Pairing | MIL 07259; MIL 07409; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 12;Ferrosilite (mol%): 4-11 | |
Weathering | |
C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The rough exterior is covered with rusty fusion crust. The interior is rusty black with some tiny inclusions. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Linda Welzenbach | |
The section consists of an equigranular aggregate of olivine, pyroxene, plagioclase, and metal with minor sulfide and chromite, with an average grain size of 0.5 mm. Olivine (Fa12) and pyroxene (Fs4-11) are homogeneous. Six calcic pyroxene grains were analyzed (Fs4). Feldspars are also homogeneous (An12Or4). The meteorite is probably a transitional acapulcoite-lodranite similar to, e.g., GRA 95209. This is most likely paired with MIL 07409. |
Antarctic Meteorite Images for Sample MIL 07259 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL07259 | |
Keil, K., McCoy, T.J., 2018, Acapulcoite-lodranite meteorites: Ultramafic asteroidal partial melt residues. Chemie der Erde, 78, 153-203, https://doi.org/10.1016/j.chemer.2017.04.004. | |
Harvey, R.P., Schutt, J., and Karner, J., 2015, Fieldwork Methods of the U.S. Antarctic Search for Meteorites Program. In Righter, K., Corrigan, C.M., McCoy, T.J., and Harvey, R.P. Meteorites: A Pictorial Guide to the Collection, First Edition, AGU Wiley, pp. 23-41. |