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Northwest Africa 1670
Basic information Name: Northwest Africa 1670
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1670
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 29 g
Meteoritical Bulletin:  MB 88  (2004)  Angrite
MetBase:  v. 7.1  (2006)  Angrite
Recommended:  Angrite    [explanation]

This is 1 of 35 approved meteorites classified as Angrite.   [show all]
Search for other: Achondrites, Angrites
Writeup from MB 88:

Northwest Africa 1670


Purchased 2001 January

Achondrite (angrite)

A single stone of 29 g mostly covered by fusion crust with mm-sized pores was purchased in Morocco by B. Fectay (Fectay).  Classification and mineralogy (A. Jambon and O. Boudouma, UPVI, and J.-A. Barrat, UAng): Phenocrysts of fassaitic pyroxenes and olivine in a finely crystallized matrix. Large zoned olivine xenocrysts (several mm in size) with overgrown tooth-shaped rims (mg# = 0.92 to 0.85-0.55). Core to rims of pyroxene phenocrysts range from mg# 0.68 to 0.60 with FeO/MnO = 76. Matrix contains olivine, pyroxene, kirschsteinite, mg# = 0.13-0.03, anorthite, An98-100, and accessory pyrrhotite, apatite, rhönite, Cr-spinel, ulvöspinel and metal. .  Oxygen isotopes (R. Greenwood and I. Franchi, OU): δ18O = 3.887‰, δ17O = 1.967‰, Δ17O = -0.055‰.  Specimens: type specimen, 5.8 g, ENSL; main mass, Fectay.

Data from:
  Table 4
  Line 18:
Origin or pseudonym:Attamina
Place of purchase:Erfoud
Date:P Jan 2003
Mass (g):29
Classifier:A. Jambon and O. Boudouma, UPVI and J.-A. Barrat, UAng
Type spec mass (g):5.8
Type spec location:ENSL
Main mass:Fectay
Plots: O isotopes:  
   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)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014)
Fectay: Bruno Fectay and Carine Bidaut, La Memoire de la Terre SARL, 39800 Aumont, France; Website (private address)
UAng: Université d'Angers, Faculté des Sciences, 2 bd Lavoisier, 49045 Angers Cedex, France (institutional address)
References: Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)
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Photos from the Encyclopedia of Meteorites:
Don Edwards   

     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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