Sample Petrographic Description
Sample Number | MIL 15309 |
Newsletter | 39,2 |
Location | Miller Range |
Field Number | 23043 |
Dimensions (cm) | 4.2 x 2.9 x 2.9 |
Weight (g) | 48.00 |
Original Classification | Diogenite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 31;Ferrosilite (mol%): 25 | |
Weathering | |
A/B | |
Fracturing | |
B | |
Macroscopic Description - Rachel Funk, Cecilia Satterwhite | |
Black fusion crust covers ~15% of the exterior. Fractures penetrate the surface. The exposed interior appears green with dark shiny minerals. The interior is a greenish gray matrix with shiny greenish black inclusions. Minor orange rust is around some of the greenish minerals and white elongated crystals are present. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section shows a groundmass of coarse (up to 2 mm) comminuted pyroxene, with minor olivine. A finer grained clast with only rare large orthopyroxenes occurs. The clast is ~2 mm in maximum dimension. Orthopyroxene has a composition of Fs25Wo2 and olivines are Fa31. The Fe/Mn ratio of the pyroxene is ~29. The meteorite is a diogenite. |
Antarctic Meteorite Images for Sample MIL 15309 | ||||
Lab Photo(s) : | ||||
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Antarctic Meteorite Images for Sample MIL 15309 | ||||
Thin Section Photo(s) : | ||||
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