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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:help 73.2 g
Classification
  history:
Recommended:  L7    [explanation]

This is 1 of 25 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
Writeuphelp
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 Fa23.0±0.1 (n=3). Low-Ca pyroxene Fs18.8±0.3Wo4.4±0.0 (n=3). Plagioclase An2.8±1.3Ab86.6±4.8Or10.6±6.0 (n=2) with K-rich rims An2.3Ab52.8Or44.9 (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 29 Oct 2018)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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