Achondrite Eucrite I 0.43g partial slice | NWA7385
|Northwest Africa 7385|
Name: Northwest Africa 7385
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7385
Observed fall: No
Year found: 2012
Mass: 51.7 g
This is 1 of 347 approved meteorites classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
|Comments:||Approved 12 Sep 2012|
Writeup from MB 101:
Northwest Africa 7385 (NWA 7385)
Purchased: May 2012
Classification: HED achondrite (Eucrite)
History: Purchased by Sean Tutorow from Morocco, May 2012.
Physical characteristics: Single stone, with abraded black fusion crust, saw cut reveals fresh, light-gray, fine-grained texture.
Petrography: C. Agee, UNM) Microprobe examination of a polished mount shows a protogranular texture with approximately 50% pyroxene and 45% plagioclase, nearly all pyroxenes with exsolution lamellae, many fractures suggesting high shock. Accessory silica, chromite, ilmenite, troilite, and iron metal with very low nickel content.
Geochemistry: (C. Agee and M. Spilde, UNM) EMPA. Pyroxene Fs51.0±13.1Wo14.2±15.6, Fe/Mn=31±1, n=32, with equilibrated trend Fs61.3Wo1.7 to Fs26.0Wo44.4; plagioclase Or0.4±0.2Ab10.4±0.8An89.1±0.6, n=6.
Classification: Achondrite (Eucrite). Equilibrated main group eucrite. Slightly weathered.
Specimens: 11.86 g including a probe mount on deposit at UNM; Sean Tutorow holds the main mass.
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