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	(2021)	Brachinite
Recommended:			Brachinite [explanation]

This is 1 of 62 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 Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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