Meteoritical Bulletin: Entry for Northwest Africa 14538

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Northwest Africa 14538

Basic information

Name: Northwest Africa 14538
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14538
Observed fall: No
Year found: 2018
Country: Morocco
Mass: 30 g

Classification
history:

Recommended:

Eucrite [explanation]

This is 1 of 576 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 22 Dec 2021

Writeup

Writeup from MB 110:

Northwest Africa 14538 (NWA 14538)

Morocco

Find: 2018

Classification: HED achondrite (Eucrite)

Petrography: (J. Gattacceca, CEREGE) Igneous rock with microgabbroic texture. Typical grain size 400 µm. Main minerals are pyroxene and plagioclase. Low-Ca pyroxene has augite exsolution with a clear dichotomy in exsolution width (20 µm and <1 µm). Accessory troilite, chromite, ilmenite, silica polymorph, metal.

Geochemistry: Low-Ca pyroxene Fs_60.1±0.7Wo_2.4±0.3, FeO/MnO 30.9±1.5 (n=4). Augite exsolutions Fs_27.7±1.2Wo_42.5±1.3(n=3). Plagioclase An_89.2±0.3Ab_10.5±0.2Or_0.3±0.1(n=4).

Classification: Achondrite (eucrite)

Specimens: Type specimen at CEREGE. Main mass with Jimmy Pizarro.

Data from:
  MB110
  Table 0
  Line 0:

Date:	2018
Mass (g):	30
Pieces:	1
Class:	Eucrite
Weathering grade:	moderate
Ferrosilite (mol%):	60.1±0.7 (n=4)
Wollastonite (mol%):	2.4±0.3
Magnetic suscept.:	3.57
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	6.3
Type spec location:	CEREGE
Main mass:	Jimmy Pizarro
Finder:	anonymous
Comments:	work name PIZ11; 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:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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