Sample Petrographic Description
Sample Number | MIL 090320 |
Newsletter | 34,1 |
Location | Miller Range |
Field Number | 20514 |
Dimensions (cm) | 2.5 x 0.75 x 0.75 |
Weight (g) | 3.64 |
Original Classification | EL6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0.3 | |
Weathering | |
C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
20% of the exterior has brown/black fusion crust with polygonal fractures. The interior is a rusty brown with high metal. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Linda Welzenbach | |
The section shows an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. Chondrules contain rare olivine grains. Weathering is moderate, with staining of some enstatite grains and minor alteration of metal and sulfides. This meteorite contains sinoite, Si2N2O. Microprobe analyses show pyroxenes of composition Fs0.3. The meteorite is an enstatite chondrite, probably an EL6. |
Antarctic Meteorite Images for Sample MIL 090320 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 090320 | ||||
Thin Section Photo(s) : | ||||