Meteoritical Bulletin: Entry for Northwest Africa 12961

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Northwest Africa 12961

Basic information

Name: Northwest Africa 12961
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12961
Observed fall: No
Year found: 2019
Country: Morocco
Mass: 73.2 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	L7
Recommended:			L7 [explanation]

This is 1 of 34 approved meteorites classified as L7. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 20 Oct 2019

Writeup

Writeup from MB 108:

Northwest Africa 12961 (NWA 12961)

Morocco

Purchased: 2019 Mar

Classification: Ordinary chondrite (L7)

Physical characteristics: Single stone without fusion crust

Petrography: (J. Gattacceca, CEREGE) Highly recrystallized rock with no relict chondrules visible in the studied section. Plagioclase has K-rich rims. Opaque minerals are metal and troilite. Abundant vesicles with typical size 250 µm.

Geochemistry: Olivine Fa_23.0±0.1(n=3). Low-Ca pyroxene Fs_18.8±0.3Wo_4.4±0.0(n=3). Plagioclase An_2.8±1.3Ab_86.6±4.8Or_10.6±6.0(n=2) with K-rich rims An_2.3Ab_52.8Or_44.9(n=1).

Classification: Ordinary chondrite (L7). Type 7 from texture, Wo content of low-Ca pyroxene, and presence of K-rich rims in plagioclase.

Specimens: Type specimen and a polished section at CEREGE. Main mass with Kuntz.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P 2019 Mar
Mass (g):	73.2
Pieces:	1
Class:	L7
Weathering grade:	W1
Fayalite (mol%):	23.0±0.1 (n=3)
Ferrosilite (mol%):	18.8±0.3 (n=3)
Wollastonite (mol%):	4.4±0.0
Magnetic suscept.:	4.47
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	15
Type spec location:	CEREGE
Main mass:	Kuntz
Comments:	work name K421; 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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