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Northwest Africa 12634
Basic information Name: Northwest Africa 12634
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12634
Observed fall: No
Year found: 2019
Country: Mauritania
Mass:help 52.1 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  L/LL3
Recommended:  L/LL3    [explanation]

This is 1 of 31 approved meteorites classified as L/LL3.   [show all]
Search for other: L chondrites, L/LL chondrites, L/LL chondrites (type 3), LL chondrites, Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 3 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12634 (NWA 12634)

Mauritania

Purchased: 2019 Jan

Classification: Ordinary chondrite (L/LL3)

History: Purchased in Nouakchott in January 2019

Petrography: (J. Gattacceca, CEREGE) Chondrite with packed, well-delineated chondrules. Chondrule average apparent diameter is 740±390 µm (n=39). Olivine is zoned. Opaque minerals (Fe,Ni metal and troilite) are found as rounded composite grains. Metal abundance 5.1 vol% (point counting, n=316). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.71.

Geochemistry: Olivine Fa30.3±2.6, range Fa25.0-33.1, Fa PMD 6.4%, Cr2O3 0.11±0.14 wt% (n=11). Low-Ca pyroxene Fs13.5±5.2Wo1.5±2.1 (n=12).

Classification: Ordinary chondrite (L/LL3). The meteorite has metal content (given by magnetic susceptibility and point counting) similar to L chondrites but olivine composition similar to LL chondrites

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

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Nouakchott, Mauritania
Date:P 2019 Jan
Mass (g):52.1
Pieces:1
Class:L/LL3
Weathering grade:W1
Fayalite (mol%):30.3±2.6 (n=11)
Ferrosilite (mol%):13.5±5.2 (n=12)
Wollastonite (mol%):1.5±2.1
Magnetic suscept.:4.71
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):10.65
Type spec location:CEREGE
Main mass:Fabien Kuntz
Comments:work name K391; 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 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 232 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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