Meteoritical Bulletin: Entry for Northwest Africa 8446

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Northwest Africa 8446

Basic information

Name: Northwest Africa 8446
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8446
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 10 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Diogenite
Recommended:			Diogenite [explanation]

This is 1 of 510 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 23 Jun 2014

Writeup

Writeup from MB 103:

Northwest Africa 8446 (NWA 8446)

(Northwest Africa)

Purchased: 2014

Classification: HED achondrite (Diogenite)

History: Purchased in Morocco in 2014

Physical characteristics: Crusted stones. Cut surface reveals gray interior

Petrography: Coarse-grained crystalline rock. Main mineral is orthopyroxene with typical grain size 750 μm. Plagioclase with grain size 100 μm. Chromite, metal (grain size 70 μm), silica and metal weathering products are present. No olivine was observed

Geochemistry: OPX Fs_25.8±0.1(n=3), FeO/MnO=29.9. Plagioclase An_88.3Ab_11.5Or_0.2.Magnetic susceptibility log χ = 3.67 (χ in 10^-9 m³/kg) indicates an unusually high metal content for a diogenite (like in Garland)

Classification: Achondrite (diogenite, metal rich)

Specimens: 2 g and a polished section in CEREGE. Main mass with Pierre-Marie Pelé.

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2014
Mass (g):	9.95
Pieces:	4
Class:	Diogenite
Ferrosilite (mol%):	25.8±0.1 (N=3)
Wollastonite (mol%):	3.0±0.26
Magnetic suscept.:	3.67
Classifier:	C. Cournède and J. Gattacceca, CEREGE
Type spec mass (g):	2
Type spec location:	CEREGE
Main mass:	Pierre-Marie Pelé
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 29 Oct 2018)

Catalogs:

References:

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

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Denis gourgues
Woreczko Jan & Wadi

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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