Meteoritical Bulletin: Entry for Northwest Africa 12733

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Northwest Africa 12733

Basic information

Name: Northwest Africa 12733
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12733
Observed fall: No
Year found: 2019
Country: Morocco
Mass: 166.7 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Brachinite
Recommended:			Brachinite [explanation]

This is 1 of 62 approved meteorites classified as Brachinite. [show all]
Search for other: Brachinites, Primitive achondrites

Comments:

Approved 8 Jul 2019

Writeup

Writeup from MB 108:

Northwest Africa 12733 (NWA 12733)

Morocco

Purchased: 2019 Mar

Classification: Primitive achondrite (Brachinite)

Physical characteristics: Brown stone without fusion crust.

Petrography: (J. Gattacceca, CEREGE) Igneous rock with equigranular texture and typical grain size 400 µm. Olivine is ultradominant over Ca-pyroxene. No plagioclase was observed. Metal and sulfides are present as euhedral grains (to 200 µm), veins along silicate rims, and µm-sized blebs within silcates. Chromite is present.

Geochemistry: Olivine Fa_29.9±0.5, FeO/MnO 55.2±2.1 (n=3). Ca-Pyroxene Fs_9.6±0.1Wo_43.5±0.1, FeO/MnO 26.4±0.7 (n=2). Chromite Cr# 0.82.

Classification: Brachinite

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

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P 2019 Mar
Mass (g):	166.7
Pieces:	1
Class:	Brachinite
Weathering grade:	moderate
Fayalite (mol%):	29.9±0.5 (n=3)
Magnetic suscept.:	3.98
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	20.36
Type spec location:	CEREGE
Main mass:	Kuntz
Comments:	work name K420; 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:
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Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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