Meteoritical Bulletin: Entry for Northwest Africa 13489

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Northwest Africa 13489

Basic information

Name: Northwest Africa 13489
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13489
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 253 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	Brachinite
Recommended:			Brachinite [explanation]

This is 1 of 59 approved meteorites classified as Brachinite. [show all]
Search for other: Brachinites, Primitive achondrites

Comments:

Approved 14 Nov 2020

Writeup

Writeup from MB 109:

Northwest Africa 13489 (NWA 13489)

(Northwest Africa)

Purchased: 2019 May

Classification: Primitive achondrite (Brachinite)

Physical characteristics: Multiple fragments, some with fusion crust

Petrography: (J. Gattacceca, CEREGE) Granulitic texture. Main minerals are olivine (dominant, grain size 300 µm), Ca- pyroxene (typical size 200 µm), plagioclase (typical size 300 µm). Other minerals: troilite (to 300 µm), chromite (to 100 µm, with lobate contacts in plagioclase), rare metal as µm-sized grains within silicates. No low-Ca pyroxene was observed.

Geochemistry: Olivine Fa_32.5±0.2, FeO/MnO=74.4±8.7 (n=7). Ca-pyroxene Fs_11.3±0.3Wo_44.0±0.2, FeO/MnO=44.6±7.2 (n=7). Plagioclase An_34.9Ab_62.2Or_2.9(n=4). Chromite Cr# 0.74 (n=2).

Classification: Achondrite (brachinite)

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

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P 2019 May
Mass (g):	253
Pieces:	many
Class:	Brachinite
Weathering grade:	high
Fayalite (mol%):	32.5±0.2 (n=7)
Magnetic suscept.:	3.42
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	20.23
Type spec location:	CEREGE
Main mass:	Kuntz
Comments:	work name K427; 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. 109, in preparation (2020)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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