Meteoritical Bulletin: Entry for Northwest Africa 13703

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Northwest Africa 13703

Basic information

Name: Northwest Africa 13703
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13703
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 21 g

Classification
history:

Recommended:

Aubrite [explanation]

This is 1 of 78 approved meteorites classified as Aubrite. [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites

Comments:

Approved 23 May 2021

Writeup

Writeup from MB 110:

Northwest Africa 13703 (NWA 13703)

(Northwest Africa)

Find: 2018

Classification: Enstatite achondrite (Aubrite)

History: Found by a nomad in the Sahara. Purchased in Morocco.

Physical characteristics: Pale brown stone without fusion crust

Petrography: (J. Gattacceca, CEREGE) Highly recrystallized rock with triple junctions. Main minerals are enstatite and plagioclase. Opaque minerals are metal (mostly weathered), troilite, schreibersite. No relict chondrules were observed in the studied section.

Geochemistry: Enstatite Fs_0.6±0.2Wo_1.4±0.1(n=3). Plagioclase An_14.6Ab_80.9Or_4.6(n=1). Kamacite Ni = 6.7 wt%, Si = 1.62 (n=3). Troilite Cr = 0.86 wt%.

Classification: Enstatite achondrite (aubrite). Classification based on mineral chemistry, mineralogy and absence of relict chondrules.

Specimens: Type specimen at CEREGE. Main mass with Patrick Roustand.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	2018
Mass (g):	21.04
Pieces:	1
Class:	Aubrite
Weathering grade:	high
Ferrosilite (mol%):	0.6±0.2 (n=3)
Wollastonite (mol%):	1.4±0.1
Magnetic suscept.:	4.25
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	4.83
Type spec location:	CEREGE
Main mass:	Patrick Roustan
Finder:	anonymous
Comments:	work name CM37; 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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Photos:

Credit	Photos
Public domain photographs:
Jerome Gattacceca

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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