Meteoritical Bulletin: Entry for Northwest Africa 5037

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Northwest Africa 5037

Basic information

Name: Northwest Africa 5037
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5037
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass: 65 g

Classification
history:

Recommended:

CM2 [explanation]

This is 1 of 609 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 11 Dec 2021

Writeup

Writeup from MB 110:

Northwest Africa 5037 (NWA 5037)

(Northwest Africa)

Purchased: 2007

Classification: Carbonaceous chondrite (CM2)

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Almost black rocks without fusion crust.

Petrography: Brecciated carbonaceous chondrite composed of small (apparent mean diameter about 300 µm) chondrules, chondrule pseudomorphs, mineral fragments, and some CAIs in abundant fine-grained ferroan matrix. Most chondrules and CAIs are surrounded by fine-grained dust rims. The matrix contains Fe-sulfides, pyrrhotite, and Ca-carbonates. Low analytical totals of matrix analyses suggest the presence of hydrous phyllosilicates.

Geochemistry: Matrix analyses yield FeO=32.1±1.3 wt% and an average total of 81.7±2.6 wt% (5 µm defocused beam, N=7), the latter indicating the presence of hydrous minerals.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2007
Mass (g):	65
Pieces:	3
Class:	CM2
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	16.7±18.9 (0.4-57.4, n=21)
Ferrosilite (mol%):	1.2±0.7 (0.6-2.6, n=13)
Wollastonite (mol%):	1.5±1.2 (0.8-4.0, n=13)
Classifier:	A. Greshake, MNB
Type spec mass (g):	14.1
Type spec location:	MNB
Main mass:	Stefan Ralew
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 110, in preparation (2021)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Dirk Hohmann
Volker Heinrich	Photo added 19 Apr 2022

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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