Meteoritical Bulletin: Entry for Northwest Africa 11209

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Northwest Africa 11209

Basic information

Name: Northwest Africa 11209
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11209
Observed fall: No
Year found: 2015
Country: Mali
Mass: 50.2 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Eucrite-unbr
Recommended:			Eucrite-unbr [explanation]

This is 1 of 130 approved meteorites classified as Eucrite-unbr. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 22 Apr 2017

Writeup

Writeup from MB 106:

Northwest Africa 11209 (NWA 11209)

Mali

Purchased: 2015

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased from El Moktar Ait Hiba at the 2015 Munich meteorite show.

Physical characteristics: A stone with fresh fusion crust. Broken surface reveals homogeneous grey interior.

Petrography: Igneous rock with ophitic texture. Low-Ca pyroxenes have augite exsolution. Average grain size 400 μm. Accessory silica polymorph, ilmenite, chromite. Rare metal.

Geochemistry: Low-Ca pyroxene Fs_60.2±0.2Wo_1.7±0.2, FeO/MnO=30.9±2.3 (N=5). Augite exsolution Fs_30.5Wo_38.1(N=1). Plagioclase An_79.2Ab_17.7Or_3.1(N=4).

Classification: Eucrite, unbrecciated

Specimens: type specimen and polished sections at CEREGE. Main mass with Pierre-Marie Pelé.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Munich, Germany
Date:	P 2015
Mass (g):	50.24
Pieces:	1
Class:	Eucrite-unbr
Weathering grade:	minimal
Ferrosilite (mol%):	60.2±0.2 (N=5)
Wollastonite (mol%):	1.7±0.2
Magnetic suscept.:	2.81
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	10.23
Type spec location:	CEREGE
Main mass:	Pierre-Marie Pelé
Finder:	Pierre-Marie Pelé
Comments:	work name HO-1A15; 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)

Catalogs:

References:

Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Geography:

Mali

Coordinates:

Unknown.

Statistics:
This is 1 of 97 approved meteorites from Mali (plus 2 unapproved names)

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