Meteoritical Bulletin: Entry for Northwest Africa 12655

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Northwest Africa 12655

Basic information

Name: Northwest Africa 12655
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12655
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 753 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	LL3-6
Recommended:			LL3-6 [explanation]

This is 1 of 40 approved meteorites classified as LL3-6. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 11 Jun 2019

Writeup

Writeup from MB 108:

Northwest Africa 12655 (NWA 12655)

(Northwest Africa)

Purchased: 2019

Classification: Ordinary chondrite (LL3-6)

History: The meteorite was purchased from a local meteorite dealer in Nouakchott, Mauritania.

Physical characteristics: Single stone completly covered by fusion crust.

Petrography: The meteorite is a chondritic breccia consisting of clastic LL3 type groundmass and chondrules with embedded up to 7 mm sized LL6 clasts. Plagioclase grain size in type 6 clasts is about 60 µm. Chondrules have a mean diameter of about 0.8 mm.

Geochemistry: type 3 lithology: olivine: Fa_13.1±10.9(Fa_1.0-29.9, n =18); pyroxene: Fs_12.7±7.9Wo_0.8±0.4(Fs_3.9-23.9Wo_0.3-1.7, n = 21); type 6 lithology: olivine: Fa_29.7±0.2, n=11; pyroxene: Fs_22.4±0.2Wo_0.6±0.1, n=11

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Nouakchott, Mauritania
Date:	P 2019
Mass (g):	753.1
Pieces:	1
Class:	LL3-6
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	13.1; 29.7
Ferrosilite (mol%):	12.7; 22.4
Wollastonite (mol%):	0.8; 0.6
Classifier:	A. Greshake, MNB
Type spec mass (g):	25.3
Type spec location:	MNB
Main mass:	Fabien Kuntz
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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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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