Sample Petrographic Description
Sample Number | MIL 07008 |
Newsletter | 31,2 |
Location | Miller Range |
Field Number | 19982 |
Dimensions (cm) | 3.5 x 3.0 x 1.5 |
Weight (g) | 31.87 |
Original Classification | Aubrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
The exterior has no fusion crust. It has a black basaltic looking matrix with white to light gray clasts. There are a couple of areas where there is some off white material. The interior is the same as the exterior. | |
Thin Section Description (,6) - Tim McCoy, Linda Welzenbach, Cari Corrigan, Rhiannon Mayne | |
The section consists of a few large FeO-free enstatite grains (up to nearly 1 cm) set in a brecciated matrix that includes FeO-free diopsides up to ~200 microns. Shock-induced planar deformation features, mosaicism, and shock darkening are common as are shock melts in the matrix. Opaques include alabandite, troilite, metal, and an unidentified Cr-Ti sulfide, possibly brezinaite. The meteorite is an aubrite. |
Antarctic Meteorite Images for Sample MIL 07008 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 07008 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL07008 | |
Wilbur, Z.E., Barnes, J.J., Dygert, N., Zeigler, R.A., Turrin, B.D., and McCoy C., Udry, A., McCubbin, F.M., Vander Kaaden, K.E., Defelice, C., Ziegler, K., Ross, D.K., McCoy, T.J., Gross, J., 2022, The effects of highly reduced magmatism revealed through aubrites, Meteoritics & Planetary Science, 57:7, 1387-1420, doi: 10.1111/maps.13823. | |
Keil, K., 2010, Enstatite achondrite meteorites (aubrites) and the histories of their asteroidal parent bodies. Chemie der Erde - Geochemistry, 70 Issue 4, 2010, 295-317, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2010.02.002. |