Meteoritical Bulletin: Entry for Northwest Africa 4644

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Northwest Africa 4644

Basic information

Name: Northwest Africa 4644
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4644
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 159.1 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	L3-6
Recommended:			L3-6 [explanation]

This is 1 of 62 approved meteorites classified as L3-6. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 11 Jun 2012

Writeup

Writeup from MB 100:

Northwest Africa 4644 (NWA 4644)

Northwest Africa

Purchased: 2006

Classification: Ordinary chondrite (L3-6)

History: The meteorite was found by an anonymous finder in Northwest Africa and bought by the main mass holder in Erfoud, Morocco.

Physical characteristics: One brownish fragment of 159.1 g without fusion crust.

Petrography: The sample is a brecciated meteorite with light-gray, brownish, and almost black angular clasts of petrological types 3 to 6. Mean chondrule size (~0.6 mm) and low metal content consistent with L type.

Geochemistry: Olivine Fa_1.3-29.7; pyroxene Fs_6.2-18.2.

Classification: Ordinary chondrite (L3-6); S3, W2.

Specimens: 22.5 g plus one polished thin section are on deposit at MNB.

Data from:
  MB100
  Table 1
  Line 1201:

Place of purchase:	Erfoud, Morocco
Date:	P 2006
Mass (g):	159.1
Pieces:	1
Class:	L3-6
Shock stage:	S3
Weathering grade:	W2
Fayalite (mol%):	16.5±9.5 (1.3-29.7, n=13)
Ferrosilite (mol%):	13±4.1 (6.2-18.2, n=13)
Classifier:	Ansgar Greshake, MNB
Type spec mass (g):	22.5
Type spec location:	MNB
Main mass:	Hanno Strufe
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

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

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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