Meteoritical Bulletin: Entry for Northwest Africa 12634

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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: 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

Writeup

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 Fa_30.3±2.6, range Fa_25.0-33.1, Fa PMD 6.4%, Cr₂O₃ 0.11±0.14 wt% (n=11). Low-Ca pyroxene Fs_13.5±5.2Wo_1.5±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

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Geography:

Mauritania

Coordinates:

Unknown.

Statistics:
This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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