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Northwest Africa 11458
Basic information Name: Northwest Africa 11458
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11458
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 422 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 226 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 30 Oct 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11458 (NWA 11458)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, brecciated)

Physical characteristics: Fully crusted stone. Cut surface reveals a light-gray interior with darker clasts (to 5 mm).

Petrography: (J. Gattacceca, CEREGE): Strongly brecciated igneous rock. The original texture is almost entirely obliterated by brecciation. Main minerals are orthopyroxenes, some with augite exsolution and plagioclase. Chromite, ilmenite, silica polymorph, troilite, rare metal.

Geochemistry: Pyroxenes: orthopyroxene Fs58.2±0.3Wo2.1±0.6 (N=7), augite exsolution Fs40.1Wo22.9 (N=1), FeO/MnO=37.3. Plagioclase An87.6±3.0Ab12.0±3.0Or0.3±0.1 (N=3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 2.70.

Classification: Eucrite-br.

Specimens: 26 g and a polished section at CEREGE. Main mass with R. Lenssen.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):421.6
Pieces:1
Class:Eucrite-br
Weathering grade:minimal
Ferrosilite (mol%):58.2±0.3 (N=7)
Wollastonite (mol%):2.1±0.6
Magnetic suscept.:2.70
Classifier:J. Gattacceca, H. Pourkhorsandi, CEREGE
Type spec mass (g):26.3
Type spec location:CEREGE
Main mass:R. Lenssen
Comments:work name Rob2017-1; submitted by J. Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
Catalogs:
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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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)
Also see:
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Revision
  history:
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