Meteoritical Bulletin: Entry for Northwest Africa 13844

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Northwest Africa 13844

Basic information

Name: Northwest Africa 13844
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13844
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 4.13 g

Classification
history:

Recommended:

CM2 [explanation]

This is 1 of 622 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 8 Jun 2021

Writeup

Writeup from MB 110:

Northwest Africa 13844 (NWA 13844)

(Northwest Africa)

Purchased: 2020 Jan

Classification: Carbonaceous chondrite (CM2)

Petrography: (J. Gattacceca, CEREGE) Chondrules with average apparent diameter 390±320 µm (n=8) set in abundant iron-rich fine-grained matrix. Chondrules have distinct fine-grained dust rims with radial fractures. Accessory minerals: sulfides, rare metal (mostly enclosed in silicates). Calcium carbonates are present. Matrix low EMPA analytical totals indicate the presence of hydrous phases.

Geochemistry: Olivine Fa_7.9±8.6, range Fa_0.6-25.6(n=6). Cr₂O₃ in ferroan olivine 0.53±0.16 wt%. Low-Ca pyroxene Fs_3.6Wo_0.9(n=2). Defocused matrix analyses: FeO 22.3±0.4 wt%, analytical total 80.0±0.3 (n=3).

Classification: Carbonaceous chondrites (CM2)

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Guelmim, Morocco
Date:	P 2020 Jan
Mass (g):	4.13
Pieces:	1
Class:	CM2
Weathering grade:	high
Fayalite (mol%):	7.9±8.6 (n=6)
Ferrosilite (mol%):	3.6 (n=2)
Wollastonite (mol%):	0.9
Magnetic suscept.:	3.04
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	0.85
Type spec location:	CEREGE
Main mass:	Pierre-Marie Pele
Finder:	anonymous
Comments:	work name PM20AC3; submitted by Jérôme 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 29 Oct 2018)

Catalogs:

References:

Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9092 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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