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NWA 16128 is one of the most beautiful and interesting ungrouped achondrite meteorites. It is full of different clasts, olivine crystals and metal flakes. This slice shows nice dark fusion crust on the edge. 

The full description of the meteorite from Metbul appear below. 

I am IMCA member no. 3229

Northwest Africa 16128
Basic information	Name: Northwest Africa 16128
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16128
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 2.87 kg
Classification
  history:	
Meteoritical Bulletin:  	MB 112  	(2024)  	Achondrite-ung
Recommended:  			Achondrite-ung    [explanation]

This is 1 of 171 approved meteorites classified as Achondrite-ung.    [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments:	Approved 29 Sep 2023
Writeuphelp	
Writeup from MB 112:
Northwest Africa 16128 (NWA 16128)

(Northwest Africa)

Purchased: 2022

Classification: Ungrouped achondrite

History: Purchased by Craig Zlimen and Mark Lyon from a Northwest African meteorite dealer, the main mass was subsequently purchased by Steve Jurvetson.

Physical characteristics: Single stone with patches of black fusion crust. The exposed interior is a fragmental breccia with coarse light-green to cream-colored grains. Scattered oxidized metal grains are visible throughout.

Petrography: (C. Agee and M. Spilde, UNM) Reflected light microscopy images and backscatter electron images show an approximate modal abundance of olivine at ~90%. Minor phases include pigeonite, augite, feldspar, kamacite, troilite, and chromite. Large olivine grains are up to 1 cm in size, but there are cataclastic zones where the grain size is as small as a few µm.

Geochemistry: (M. Spilde, UNM) Olivine Fa11.2±2.9, Fe/Mn=42±4, n=13; pigeonite Fs30.7±12.2Wo9.3±6.4, Fe/Mn=29±2, n=4; plagioclase An72.2±12.2Ab27.2±12.1, n=3.

Classification: Ungrouped achondrite, dunite breccia. Similar to NWA 12217, possibly paired with NWA 12562, NWA 12319, NWA 13954, and NWA 14993. Highly variable grain size as is the case for all the ungrouped dunites NWA 12217, NWA 12562, NWA 12319, NWA 13954, and NWA 14993.


Switzerland

NWA 16128 Ungrouped Achondrite - 1.3 g - (1)

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NWA 16128 Ungrouped Achondrite - 1.3 g - (1)

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