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Northwest Africa 1669
Basic information Name: Northwest Africa 1669
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1669
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 36 g
Meteoritical Bulletin:  MB 87  (2003)  Martian (basaltic shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-basaltic
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 324 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Writeup from MB 87:

Northwest Africa 1669


Purchased 2001 January

Martian meteorite (basaltic shergottite)

A single stone weighing 36 g was bought in Erfoud by Bruno Fectay (Fectay). The location of its find is unknown but Al Mala’ika was used as working name. The sample is mostly covered with desert varnish with a few remnants of fusion crust. Classification and mineralogy (A. Jambon and O. Boudouma, UPVI; J.–A. Barrat, UAng; M. Bohn, Brest): fine-grained basaltic rock consisting mainly of zoned pyroxenes with intergrowths of pigeonite En58–25Wo9–19Fs32–61 and augite En19–47Wo39–24Fs54–18; FeO/MnO ratio of 34 (n = 312). Maskelynite (Ab41–53Or1–6An58–42) appears to be injected between pyroxene phenocrysts. Accessory minerals include pyrrhotite, merrilite, apatite, ulvöspinel, ilmenite, silica, and baddeleyite. Small melt pockets with stishovite occuring as submicrometer-sized needles. Pyroxene cores are cut by large- and medium-sized fractures, whereas their rims are affected by numerous small fractures. Maskelynite is only affected by a few major fractures. Terrestrial calcite is present mainly as veins cross-cutting the meteorite, as in many other Saharan finds. Oxygen isotope composition (I. A. Franchi, OU): δ18O = +0.30‰; δ17O = +2.85‰; ∆17O = +4.91‰. Specimen; main mass, Fectay; type specimen, 7.4 g, ENSL.

Data from:
  Table 8
  Line 230:
Origin or pseudonym:Al Mala'ika
Place of purchase:Erfoud
Date:P 1 Jan 2003
Mass (g):36
Classifier:A. Jambon and O. Boudouma, UPVI, J.-A. Barrat, UAng and M. Bohn, Brest
Type spec mass (g):7.4
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)
Brest: Institut Français de recherché pour l’exploitation de la mer Brest, BP70, F-29280 Plouzané Cedex, France (institutional address)
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. 87, MAPS 38, A189-A248 (2003)
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Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut   
Don Edwards   

     This is 1 of 9765 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)

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