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Northwest Africa 13836
Basic information Name: Northwest Africa 13836
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13836
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1.85 g
Classification
  history:
Recommended:  Eucrite-cm    [explanation]

This is 1 of 49 approved meteorites classified as Eucrite-cm.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 25 Apr 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13836 (NWA 13836)

(Northwest Africa)

Purchased: 2020 Oct

Classification: HED achondrite (Eucrite, cumulate)

Petrography: (J. Gattacceca, CEREGE) Granular igneous rock with grain size 2 mm. Main minerals are equilibrated low-Ca pyroxene, and plagioclase. Ca-pyroxene are also present (to 100 µm). Pyroxenes do not show exslolution lamellae. Other minerals are silica polymorph (to 100 µm, and as 10 µm inclusions in plagioclase), merrillite, ilmenite, kamacite (at silicate grain rims, up to 200 µm, and as µm-sized blebs in the pyroxene)

Geochemistry: Low-Ca pyroxene Fs42.8±2.4Wo7.7±1.1, FeO/MnO = 27.7±2.7 (n=10). Plagioclase An94.3±1.8Ab5.6±1.7Or0.1±0.1 (n=7). Chromite Cr# = 0.76 (n=2).

Classification: Achondrite (eucrite, cumulate). Unusually metal-rich, with elongated metal grains up to 100 µm located in between silicate grains.

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Guelmin, Morocco
Date:P 2020 Oct
Mass (g):1.85
Pieces:1
Class:Eucrite-cm
Weathering grade:moderate
Magnetic suscept.:3.79
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):0.49
Type spec location:CEREGE
Main mass:Kuntz
Finder:anonymous
Comments:work name K508; submitted by Jérôme 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 29 Oct 2018)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7688 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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