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Northwest Africa 13839
Basic information Name: Northwest Africa 13839
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13839
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 211 g
Classification
  history:
Recommended:  Acapulcoite    [explanation]

This is 1 of 82 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 25 Apr 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13839 (NWA 13839)

(Northwest Africa)

Purchased: 2020 Oct

Classification: Primitive achondrite (Acapulcoite)

Physical characteristics: Brownish stone. Interior is dark with metal.

Petrography: (J. Gattacceca, CEREGE) Recrystallized equigranular rock with granoblastic texture. Grain size 250 µm. No relict chondrules were observed. Main minerals are orthopyroxene, olivine, and diopside. Rare sodic plagioclase, with lobate shapes. Opaque minerals are metal and troilite.

Geochemistry: Olivine Fa3.8, FeO/MnO = 22.8 (n=2). Orthopyroxene Fs4.6Wo2.0, FeO/MnO = 12.6 (n=1). Diopside Fs1.3±0.1Wo45.4±0.6, Cr2O3 0.20±0.03 wt%, FeO/MnO = 14.0 (n=3). Plagioclase An21.1Ab75.7Or3.2 (n=1).

Classification: Primitive achondrite (acapulcoite)

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

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2020 Oct
Mass (g):210.8
Pieces:1
Class:Acapulcoite
Weathering grade:low
Fayalite (mol%):3.8 (n=2)
Ferrosilite (mol%):4.6 (n=1)
Wollastonite (mol%):2.0
Magnetic suscept.:5.11
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):21.99
Type spec location:CEREGE
Main mass:Kuntz
Finder:anonymous
Comments:work name K524; 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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