Meteoritical Bulletin: Entry for Northwest Africa 14679

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Northwest Africa 14679

Basic information

Name: Northwest Africa 14679
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14679
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 24 g

Classification
history:

Recommended:

CM2 [explanation]

This is 1 of 626 approved meteorites classified as CM2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites

Comments:

Approved 19 Feb 2022

Writeup

Writeup from MB 111:

Northwest Africa 14679 (NWA 14679)

(Northwest Africa)

Purchased: 2005

Classification: Carbonaceous chondrite (CM2)

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

Physical characteristics: The meteorite displays a brownish interior and is a brecciated carbonaceous chondrite composed of small (apparent mean diameter about 250 μm) chondrules, chondrule pseudomorphs, mineral fragments, and rare CAIs, most surrounded by fine-grained dust rims set into abundant fine-grained matrix. The matrix is Fe-rich and strongly altered. Sulfides are mostly replaced by Fe-oxides and calcite-filled veins are ubiquitous.

Geochemistry: Matrix analyses yield FeO=37.5±0.9 wt% and an average total of 79.0±1.8 wt% (5 µm defocused beam, N=8), the latter indicating the presence of hydrous minerals.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2005
Mass (g):	24
Pieces:	1
Class:	CM2
Shock stage:	S2
Weathering grade:	moderate
Fayalite (mol%):	16.7±15.7 (0.5-47.4, n=18)
Ferrosilite (mol%):	6.4±10.6 (1.1-35.3, n=15)
Wollastonite (mol%):	1.6±0.8 (0.6-36, n=15)
Magnetic suscept.:	3.59
Classifier:	A. Greshake, MNB
Type spec mass (g):	4.9
Type spec location:	MNB
Main mass:	Polandmet - Marcin Cimala
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Polandmet: targoniny 30 43445 Dziegielow Poland, Poland; Website (institutional address; updated 7 May 2021)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2022)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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