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Northwest Africa 11488
Basic information Name: Northwest Africa 11488
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11488
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 22 g
Meteoritical Bulletin:  MB 106  (2018)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 485 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 21 Nov 2017
Writeup from MB 106:

Northwest Africa 11488 (NWA 11488)


Purchased: 2017

Classification: HED achondrite (Diogenite)

History: A single stone weighing 22 g was found in Morocco prior to 2016. J. Donald Cline and John Sinclair acquired the sample from a meteorite dealer at the Tucson Gem and Mineral Show in February of 2017.

Physical characteristics: Sample is weakly tabular in shape, dark brownish-green has a patchy brown fusion crust which covers ~ 10% of the specimen. Sample is weakly magnetic and the broken and uncrusted sides show crystalline texture.

Petrography: Description and classification (A. Love, App): Sample is an unbrecciated, crystalline rock composed of cumulate-textured, coarse-grained (average grainsize: 2570 µm), interlocking, light green orthopyroxene crystals (many of which have a preferred orientation). Additional minerals are: chromite, troilite, Fe-metal and Si-polymorph.

Geochemistry: (A. Love, App) Opx Fs26.4±0.4 Wo2.3±0.5 (FeO/MnO=25.1-31.9, N=18).

Classification: HED (diogenite). Mineral textures and compositions suggest this is an unbrecciated orthopyroxenitic diogenite.

Specimens: PARI holds the main mass. An endcut and several small fragments weighing 4.93 g and a polished thin section are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson Gem and Mineral Show
Date:P 2017
Mass (g):22
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):26.4±0.4
Wollastonite (mol%):2.3±0.5
Classifier:A. Love, App
Type spec mass (g):4.93
Type spec location:App
Main mass:PARI
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
PARI: Pisgah Astronomical Research Institute 1 Pari Dr Rosman, NC 28772, United States (institutional address; updated 13 Sep 2016)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 1743 approved meteorites from Morocco (plus 26 unapproved names) (plus 1 impact crater)

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