Meteoritical Bulletin: Entry for Northwest Africa 13495

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Northwest Africa 13495

Basic information

Name: Northwest Africa 13495
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13495
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 572 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 14 Nov 2020

Writeup

Writeup from MB 109:

Northwest Africa 13495 (NWA 13495)

(Northwest Africa)

Purchased: 2020 Feb

Classification: Carbonaceous chondrite (CO3)

Petrography: (J. Gattacceca, CEREGE) Chondrite with small chondrules (average apparent diameter 160±80 μm, n=23) and CAIs (to 300 μm) set in an abundant fine-grained iron-rich matrix (42 vol% by point counting). Opaque are metal and troilite.

Geochemistry: Olivine Fa_23.9±16.3, range Fa_1.4-50.0, Fa PMD = 61%, Cr₂O₃ 0.14±0.10 wt% (n=25). Low-Ca pyroxene Fs_3.4±1.9Wo_2.2±0.9(n=3).

Classification: Carbonaceous chondrite (CO3). Estimated subtype 3.2-3.5 based on Fa PMD and Cr₂O₃ content of ferroan olivine.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Laayoune
Date:	P 2020 Feb
Mass (g):	572
Pieces:	1
Class:	CO3
Weathering grade:	high
Fayalite (mol%):	23.9±16.3 (n=25)
Ferrosilite (mol%):	3.4±1.9 (n=3)
Wollastonite (mol%):	2.2±0.9
Magnetic suscept.:	3.71
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	33.9
Type spec location:	CEREGE
Main mass:	Kuntz
Comments:	work name K483; 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 Meteoritical Bulletin, no. 109, in preparation (2020)

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)
Ryan Upchurch

Geography:

Coordinates:

Unknown.

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

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