Meteoritical Bulletin: Entry for Northwest Africa 10240

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Northwest Africa 10240

Basic information

Name: Northwest Africa 10240
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10240
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 242 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	LL7
Recommended:			LL7 [explanation]

This is 1 of 100 approved meteorites classified as LL7. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 30 Apr 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10240 (NWA 10240)

(Northwest Africa)

Purchased: 2010 June

Classification: Ordinary chondrite (LL7)

History: Purchased in June 2010 at Saint-Marie-aux-Mines

Physical characteristics: A single crusted stone. Cut surface reveals angular dark clasts up to 5 mm in a lighter matrix.

Petrography: Highly recrystallized chondrite with triple junctions and typical grain size ~100 μm. Rare relict barred olivine chondrules to 1 mm in diameter. Main minerals are olivine, pyroxenes, plagioclase (mean size 100 μm, to 200 μm), chromite (to 100 μm), Ca-phosphate (to 500 μm), FeNi metal. The rock is brecciated and contains dark clasts up to 5 mm.

Geochemistry: Olivine Fa_32.0±0.3(N=5), orthopyroxene Fs_26.3±0.1Wo_2.8±0.2(N=3), augite Fs_11.1Wo_43.7(N=1), plagioclase An_10.5Ab_84.8Or_4.7(N=2), chromite Cr#=0.87±0.01 (N=3).

Classification: LL7 based on Wo content of orthopyroxene and plagioclase grain size. Brecciated.

Specimens: 23 g in CEREGE, main mass with Labenne

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Sainte-Marie-aux-Mines
Date:	P 2010 June
Mass (g):	242
Pieces:	1
Class:	LL7
Weathering grade:	W3
Fayalite (mol%):	32.0±0.3
Ferrosilite (mol%):	26.3±0.1
Wollastonite (mol%):	2.8±0.2
Magnetic suscept.:	3.05
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	23
Type spec location:	CEREGE
Main mass:	Labenne Luc
Comments:	Submitted by J. 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)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Geography:

Coordinates:

Unknown.

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

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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