Sample Petrographic Description
Sample Number | MAC 02635 |
Newsletter | 27,1 |
Location | MacAlpine Hills |
Field Number | 14780 |
Dimensions (cm) | 3.0 x 2.0 x 2.0 |
Weight (g) | 17.89 |
Original Classification | EL3 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 1-4 | |
Weathering | |
C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior of this enstatite chondrite is rusty and shiny. The rusty black matrix is hard, brittle and contains dark gray to rusty chondrules/inclusions that are 1-2 mm in size. | |
Thin Section Description (,2) - Linda Welzenbach, Tim McCoy | |
The section shows an aggregate of chondrules (up to 2 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. A few chondrules contain rare olivine. Weathering is moderate, with staining of enstatite grains and heavy alteration of metal and sulfides. Microprobe analyses shows the orthopyroxene is Fs1-4 and metal contains 1.1 wt.% Si. The meteorite is an EL3 chondrite and is likely not paired with MAC 02837/02839. |
Antarctic Meteorite Images for Sample MAC 02635 | ||||
Lab Photo(s) : | ||||
References for Sample MAC02635 | |
Rubin, A. E., & Ma, C. , 2017, Meteoritic minerals and their origins. . Chemie der Erde-Geochemistry, 77, 325-385, http://dx.doi.org/10.1016/j.chemer.2017.01.005. | |
Weisberg, M.K., and Righter, K., 2015, Primitive Asteroids: Expanding the Range of Known Primitive Materials. 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. 65-77. | |
Van Niekerk, D., Keil, K., 2011, Metal/sulfide-silicate intergrowth textures in EL3 meteorites: Origin by impact melting on the EL parent body. Meteoritics & Planetary Science, 46, 1484-1497, http://dx.doi.org/10.1111/j.1945-5100.2011.01244.x. | |
Rochette, P., Kohout, T., Pesonen, L., Quirico, E., Sagnotti, L., Skripnik, A., Gattacceca, J., Bonal, L., Bourot-Denise, M., Chevrier, V., Clerc, J. P., Consolmagno, G., Folco, L., Gounelle, M., 2008, Magnetic classification of stony meteorites: 2. Non-ordinary chondrites. Meteoritics & Planetary Science, 43, 959-980, http://dx.doi.org/10.1111/j.1945-5100.2008.tb01092.x. |