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Petrographic Descriptions (Select a sample)
| Sample No.: | RBT 04239 |
| Location: | Roberts Massif |
| Field No.: | 16319 |
| Dimensions (cm): | 2.5x2.0x1.25 |
| Weight (g): | 11.964 |
| Meteorite Type: | Achondrite-Ungrouped |
Macroscopic Description: Kathleen McBride
90% of the exterior has brown/black fusion crust with polygonal fractures and oxidation halos. The interior is rusty black with high metal content.
Thin Section (,2) Description: Tim McCoy
The section consists of an olivine-rich groundmass with pyroxene, plagioclase, metal and troilite present. Micron-sized metal-sulfide veinlets are abundant and a few relict chondrules are present. Olivine is Fa24, orthopyroxene is Fs20Wo2, clinopyroxene is Fs8Wo44 and plagioclase is An10Or5. The meteorite may be an ungrouped primitive achondrite and has some similarities to the Divnoe meteorite (Petaev et al., Meteoritics, 29, 182).
Thin Section Images
| Cross-Polarized Light | Plane-Polarized Light |
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Lab Images
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