Sample Petrographic Description
Sample Number | MET 01232 |
Newsletter | 27,1 |
Location | Meteorite Hills |
Field Number | 13811 |
Dimensions (cm) | 2.0 x 1.5 x 1.5 |
Weight (g) | 7.62 |
Original Classification | Acapulcoite |
Pairing | MET 01195; MET 01198; MET 01212; MET 01232; MET 01244; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 8-9;Ferrosilite (mol%): 8 | |
Weathering | |
C | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride, Cecilia Satterwhite | |
Exteriors of these acapulcoites have black/brown fusion crust with oxidation haloes. The interior is rusty brown with dark gray to black patches. Some metal is visible. | |
Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
The meteorites are so similar that a single description suffices. The sections consist of an equigranular aggregate with grains up to 0.5 mm. Minerals include olivine (Fa8-9,), orthopyroxene (Fs8,), chromian diopside (Fs3-4,Wo44-46,), phosphates, metal and troilite. Metal and sulfide occur as large grains, veinlets and metal-sulfide blebs within orthopyroxene. Weathering is moderate, with extensive staining. The meteorites are acapulcoites and are very likely paired with MET 01195/01198/01244. |
Antarctic Meteorite Images for Sample MET 01232 | ||||
Lab Photo(s) : | ||||
References for Sample MET01232 | |
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. | |
Rochette, P., Gattacceca, J., Bourot-Denise, M., Consolmagno, G., Folco, L., Kohout, T., Pesonen, L., Sagnotti, L., 2009, Magnetic classification of stony meteorites: 3. Achondrites. Meteoritics & Planetary Science, 44, 405-427, http://dx.doi.org/10.1111/j.1945-5100.2009.tb00741.x. |