Sample Petrographic Description
Sample Number | MIL 11073 |
Newsletter | 37,2 |
Location | Miller Range |
Field Number | 23868 |
Dimensions (cm) | 2.0 x 1.5 x 0.5 |
Weight (g) | 3.30 |
Original Classification | EH3 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0-3 | |
Weathering | |
C | |
Fracturing | |
C | |
Macroscopic Description - Kathleen McBride | |
The exterior has brown/black fusion crust with polygonal fractures. The interior is rusty with high metal content. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach, Pamela Salyer | |
The section shows an aggregate of distinct chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. Chondrules contain small to moderate abundances of olivine. Weathering is moderate, with staining of most enstatite grains and moderate alteration of metal and sulfides. Microprobe analyses show the pyroxene is Fs0-3. The meteorite is a type 3 enstatite chondrite, probably an EH3. |
Antarctic Meteorite Images for Sample MIL 11073 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL11073 | |
Dunham, E. T., Sheikh, A., Opara, D., Matsuda, N., Liu, M. C., & McKeegan, K. D., 2023, Calcium–aluminum-rich inclusions in non-carbonaceous chondrites: Abundances, sizes, and mineralogy, Meteoritics & Planetary Science, 58, 643-671, doi: 10.1111/maps.13975. |