Meteoritical Bulletin: Entry for Northwest Africa 8479

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Northwest Africa 8479

Basic information

Name: Northwest Africa 8479
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8479
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 155.8 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Eucrite-unbr
Recommended:			Eucrite-unbr [explanation]

This is 1 of 136 approved meteorites classified as Eucrite-unbr. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 18 Jul 2014

Writeup

help

Writeup from MB 103:

Northwest Africa 8479 (NWA 8479)

(Northwest Africa)

Purchased: 2013 Jun 06

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased in Erfoud June 6, 2013.

Physical characteristics: Five complete stones with a thin translucent fusion crust. Cut surface reveals a homogeneous coarse-grained grayish interior.

Petrography: (J. Gattacceca, CEREGE): Unbrecciated and heavily fractured inequigranular igneous rock with poikilophytic texture. Typical grain size 800 μm. Mineralogy: pyroxene (53 vol%, with exsolution of augite in low-Ca pyroxenes), plagioclase (45 vol%), accessory chromite, ilmenite, silica, rare metal.

Geochemistry: Low Ca pyroxene Fs_59.4±1.9Wo_4.3±1.9(n=8) FeO/MnO = 31.4±2.0. Augite exsolution Fs_26.3Wo_44.0(n=1) FeO/MnO = 31.2. Plagioclase An_88.5±0.2Ab_11.2±0.3Or_0.2±0.1(n=4). Chromite Cr# 81% (n=1). Magnetic susceptibility 3.08 (log χ with χ in 10^-9 m³/kg).

Classification: Eucrite (basaltic, unbrecciated). Low weathering.

Specimens: 24.1 g at CEREGE. Main mass with P. Thomas

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2013 Jun 06
Mass (g):	155.8
Pieces:	5
Class:	Eucrite-unbr
Weathering grade:	low
Ferrosilite (mol%):	59.4±1.9
Wollastonite (mol%):	4.3±1.9
Magnetic suscept.:	3.08
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	24.13
Type spec location:	CEREGE
Main mass:	P. Thomas
Comments:	Submitted by J. 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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