Meteoritical Bulletin: Entry for Northwest Africa 13887

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Northwest Africa 13887

Basic information

Name: Northwest Africa 13887
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13887
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 229 g

Classification
history:

Recommended:

CO3 [explanation]

This is 1 of 642 approved meteorites (plus 1 unapproved name) classified as CO3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites

Comments:

Approved 23 May 2021

Writeup

Writeup from MB 110:

Northwest Africa 13887 (NWA 13887)

(Northwest Africa)

Purchased: 2019 Oct

Classification: Carbonaceous chondrite (CO3)

Physical characteristics: A single dark stone broken in two fragments. Cut surface reveals a dark interior with small chondrules.

Petrography: (J. Gattacceca, CEREGE) Chondrite with small chondrules (average apparent diameter ~150 µm) and CAIs set in abundant fine-grained iron rich matrix (43 vol% by point counting, n=175 points). Opaque minerals are metal, troilite and magnetite.

Geochemistry: Olivine Fa_17.6±11.8, range Fa_1.8-40.8, Cr₂O₃ = 0.17±0.10 wt% (n=15). Low-Ca pyroxene Fs_4.9±3.7Wo_1.0±0.1(n=5).

Classification: Carbonaceous chondrite (CO3)

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P 2019 Oct
Mass (g):	229.4
Pieces:	1
Class:	CO3
Weathering grade:	high
Fayalite (mol%):	17.6±11.8 (n=15)
Ferrosilite (mol%):	4.9±3.7 (n=5)
Wollastonite (mol%):	1.0±0.1
Magnetic suscept.:	3.74
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	21
Type spec location:	CEREGE
Main mass:	Kuntz
Finder:	anonymous
Comments:	work name K464; 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 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)

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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Photos:

Credit	Photos
Public domain photographs:
Jerome Gattacceca

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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