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Northwest Africa 1296
Basic information Name: Northwest Africa 1296
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1296
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 810 g
Classification
  history:
Meteoritical Bulletin:  MB 87  (2003)  Angrite
MetBase:  v. 7.1  (2006)  Angrite
Recommended:  Angrite    [explanation]

This is 1 of 33 approved meteorites classified as Angrite.   [show all]
Search for other: Achondrites, Angrites
Writeuphelp
Writeup from MB 87:

Northwest Africa 1296

Morocco

Found 2001 spring

Achondrite (angrite)

The single stone weighs 810 g and appears quite fresh with a very thin and shiny, dark-grey, typical fusion crust. It was found in Morocco in spring 2001 by an anonymous finder and afterwards bought by a dealer in Bouarfa (Morocco). Petrography, mineralogy, chemistry and classification (A. Jambon, UPVI; J.-A. Barrat, UAng; O. Boudouma, UPVI): The rock has a fine-grained magmatic texture, indicating rapid cooling, and is significantly different from other angrites. Numerous small vesicles are present, some of which filled with carbonate. Olivine (≈Fo50) was the first phase to crystallize, as feathery chains a few micrometers in thickness. It is closely associated with anorthite (An98–100) overgrowing the olivine crystals. These composite chains are separated from one another by intergrown elongated Al, Ti-rich diopside. Both olivine and pyroxene are normally zoned up to mg# <0.01. The most magnesian pyroxene and olivine have mg# of 0.52. The Fe-rich olivines also contain up to 12 wt% CaO, a typical feature of angrites; they appeared after plagioclase crystallization stopped at the end of the crystallization sequence when co-crystallization of olivine with sub-calcic kirschsteinite is observed. Minor phases are pyrrhotite, Ca-phosphate, a silico-phosphate similar to that found in d’Orbigny and titanomagnetite. The bulk rock analysis is that of a typical angrite like d’Orbigny or Sahara 99555, with a (Ca/Al)CI of 1.52. Extensive trace element data confirm that alkali elements are strongly depleted. Ba is slightly enriched probably as a result of terrestrial alteration; Sr is not. All refractory lithophile incompatible elements exhibit a flat chondrite normalized pattern with an enrichment of 13 × CI. Specimens: main mass, Moroccan Import, Asnières, France; type specimen, 49 g, UPVI.

Data from:
  MB87
  Table 8
  Line 81:
Origin or pseudonym:Morocco
Place of purchase:Bouarfa
Date:spring 2001
Mass (g):810
Pieces:1
Class:Angr
Classifier:A. Jambon, UPVI, J.-A. Barrat, UAng and O. Boudouma, UPVI
Type spec mass (g):49
Main mass:dealer (Moroccan Import, Asnieres, France)
Institutions
   and collections
UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014)
UAng: Université d'Angers, Faculté des Sciences, 2 bd Lavoisier, 49045 Angers Cedex, France (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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