Meteoritical Bulletin: Entry for Northwest Africa 15761

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Northwest Africa 15761

Basic information

Name: Northwest Africa 15761
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15761
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 30.7 g

Classification
history:

Recommended:

Eucrite [explanation]

This is 1 of 573 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 4 Mar 2023

Writeup

Writeup from MB 112:

Northwest Africa 15761 (NWA 15761)

(Northwest Africa)

Purchased: 2022 May

Classification: HED achondrite (Eucrite)

History: Jason Whitcomb purchased a single stone from a Moroccan dealer.

Petrography: (J. Gattacceca, CEREGE) Igneous rock with granoblastic texture and grain size 400 µm. Main minerals are exsolved pyroxene and plagioclase. Accessory minerals: exsolved Fe,Ti oxides, rare Fe metal. A 4 mm clast with subopthitic texture and grain size 1.5 mm, dark in optical reflected light, is present.

Geochemistry: Low-Ca pyroxene Fs_61.3±0.6Wo_7.5±0.4, FeO/MnO 32.8±1.6 (n=4). Ca-pyroxene exsolution Fs_34.2Wo_38.7, FeO/MnO 35.3 (n=1). Plagioclase An_91.1±1.33Ab_8.6±1.2Or_0.4±0.1(n=3). Pyroxene in subopthic clast Fs_63.8Wo_5.0, FeO/MnO 37.1 (n=1).

Classification: Achondrite (eucrite)

Specimens: Type specimen at CEREGE, main mass at Whitcomb Meteorite Collection

Data from:
  MB112
  Table 0
  Line 0:

Date:	P 2022 May
Mass (g):	30.7
Pieces:	1
Class:	Eucrite
Weathering grade:	low
Ferrosilite (mol%):	61.3±0.6 (n=4)
Wollastonite (mol%):	7.5±0.4
Magnetic suscept.:	2.82
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	6.4
Type spec location:	CEREGE
Main mass:	Whitcomb Meteorite Collection
Finder:	anonymous
Comments:	work name JW181; 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 Meteoritical Bulletin, no. 112, in preparation (2023)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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