Sample Petrographic Description
Sample Number | MIL 07139 |
Newsletter | 34,1 |
Location | Miller Range |
Field Number | 18355 |
Dimensions (cm) | 7.0 x 3.8 x 1.5 |
Weight (g) | 120.34 |
Original Classification | EH3 Chondrite |
Pairing | MIL 07241; MIL 07028; MIL 07139; MIL 07364; MIL 07369; MIL 07393; MIL 07654; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 1-5 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride, Cecilia Satterwhite | |
Thin brown/black fusion crust is present on the fractured exterior surfaces. Areas without fusion crust have brown oxidation and rusty areas. The interiors are rusty with crystalline texture and visible metal. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
These sections are similar enough that one description suffices. The sections show an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide, including daubreelite. Microprobe analyses show pyroxene is Fs1-17, though most are Fs1. Kamacite ranges from 2.4-2.7 wt. % Si. These meteorites are EH3 chondrites and are probably part of the MIL 07241 pairing group. |
Antarctic Meteorite Images for Sample MIL 07139 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 07139 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL07139 | |
Clay, P. L., Burgess, R., Busemann, H., RuziƩ-Hamilton, L., Joachim, B., Day, J. M., & Ballentine, C. J. , 2017, Halogens in chondritic meteorites and terrestrial accretion. Nature, 551, 614, doi:10.1038/nature24625. |