Meteoritical Bulletin: Entry for Northwest Africa 1239

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Northwest Africa 1239

Basic information

Name: Northwest Africa 1239
This is an OFFICIAL meteorite name.
Abbreviation: NWA 1239
Observed fall: No
Year found: unknown
Country: (Northwest Africa)
Mass: 237 g

Classification
history:

NHM Catalogue:	5th Edition	(2000)	Diogenite
Meteoritical Bulletin:	MB 86	(2002)	Diogenite
MetBase:	v. 7.1	(2006)	Diogenite-pm
Recommended:			Diogenite-pm [explanation]

This is 1 of 63 approved meteorites classified as Diogenite-pm. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Writeup

Writeup from MB 86:

Northwest Africa 1239

Northwest Africa

Found 2001

Achondrite (diogenite)

A single stone of 237 g was bought in Zagora in 2001 May. The meteorite is a polymict breccia that contains more than 90 vol% orthopyroxene fragments. Classification and mineralogy (J-A. Barrat, UAng; M. Bohn, I-CB; V. Sautter, MNHNP; Ph. Gillet, ENSL): typical orthopyoxene, En_70–72Wo₂ (FeO/MnO molar = 32), but many more ferroan grains exist, contains inverted pyroxenes of eucritic origin, Fs₂₇Wo₄₅ to Fs₆₄Wo₂ and Fs₂₂Wo₄₄ to Fs₅₁Wo₁ (two grains), calcic plagioclase, An₉₄-An₈₁, olivine, Fa₄₀–Fa₅₅, metal, pure Fe and FeNi, and troilite. Specimens: type specimen, 22 g and one polished thin section, ENSL; main mass is with the anonymous purchaser.

Data from:
  MB86
  Table 6
  Line 154:

Date:	P unknown
Mass (g):	237
Pieces:	1
Class:	Diogenite

Institutions
and collections

ENSL: Ecole Normale Supérieure de Lyon, Laboratoire de Sciences de la Terre, 46 allée d'Italie 69364 Lyon Cedex, France (institutional address; updated 27 Feb 2011)
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
I-CB: Institut Français de recherché pour l’exploitation de la mer Brest, BP70, F-29280 Plouzané Cedex, France (institutional address)
UAng: Université d'Angers, Faculté des Sciences, 2 bd Lavoisier, 49045 Angers Cedex, France (institutional address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)

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Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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