Meteoritical Bulletin: Entry for Northwest Africa 13500

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Northwest Africa 13500

Basic information

Name: Northwest Africa 13500
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13500
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 24.6 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	L(LL)3
Recommended:			L(LL)3 [explanation]

This is 1 of 16 approved meteorites classified as L(LL)3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 2 Nov 2020

Writeup

Writeup from MB 109:

Northwest Africa 13500 (NWA 13500)

(Northwest Africa)

Purchased: 2020 Jan

Classification: Ordinary chondrite (L(LL)3)

Petrography: (J. Gattacceca, CEREGE) Chondrite with "cluster chondrite" texture [Metzler K., 2015, MAPS 47:2193-2217]. Average apparent chondrule diameter 720±300 µm (n=34).

Geochemistry: Olivine Fa_16.9±10.6, range Fa_4.5-36.7, Fa PMD = 56%, Cr₂O₃ 0.09±0.13 wt% (n=14). Low-Ca pyroxene Fs_14.8±7.7Wo_1.5±1.5(n=5).

Classification: Ordinary chondrite L(LL)3. The L group is favored based on magnetic susceptibility, but neither chondrule size nor magnetic susceptibility can exclude the LL classification. Hence the L(LL) classification. Estimated subtype 3.2-3.5 based on Fa PMD and the Cr₂O₃ content of ferroan olivine.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Guelmim
Date:	P 2020 Jan
Mass (g):	24.64
Pieces:	1
Class:	L(LL)3
Weathering grade:	W4
Magnetic suscept.:	4.17
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	5.22
Type spec location:	CEREGE
Main mass:	Pierre-Marie Pelé
Comments:	work name PM20AC2; 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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