Ultra-Rare Achondrite Meteorite
- Morocco or Algeria
- Found 2005
- Achondrite (ungrouped)
History: A complete 219 g stone with no crust was purchased in Erfoud,
Morocco in November 2005. Petrography: (T. Bunch and J. Wittke, NAU) Contains mm-sized
pigeonite with exsolved augite lamellae surrounded by recrystallized plagioclase and minor
amounts of relict plagioclase of similar composition. Geochemistry: Pigeonite
(Fs64.8Wo6.1), FeO/MnO = 64; Augite (Fs44.2 Wo27.3); Plagioclase (An84.0 86.8).
Abundant chromite is observed. The sample also contains minor amounts of Zn-bearing FeS,
Cr-ulvöspinel, silica and phosphate. Classification: Achondrite (Ungrouped).
This meteorite is paired with NWA 2400 and NWA 011. Although no oxygen isotopic data has
yet been obtained, the petrography is essentially identical to these two meteorites. Shock
effects are minimal and internal weathering is very low. Specimens: A 23.2 g sample is on
deposit at NAU.
Click images to enlarge:
|The above specimen is a wedged shaped piece with three cut faces.
The three photographs above were all taken while the specimen was sitting on the
cut bottom. The first two show the othere two cut faces which measure 28.4mm by
20.1mm and 28.4mm by 19.6mm respectively. The third photo is a view of the back
side. It weighs a whopping 16.6 grams. - $16,000-
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