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Northwest Africa 1068
Basic information Name: Northwest Africa 1068
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1068
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 577 g
NHM Catalogue:  5th Edition  (2000)  Martian (shergottite)
Meteoritical Bulletin:  MB 86  (2002)  Martian (basaltic shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-basaltic (ol phyric)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 180 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Writeup from MB 86:

Northwest Africa 1068


Found 2001 April

Martian meteorite (basaltic shergottite)

In 2001 April, meteorite hunters of the local team of "La Mémoire de la Terre" recovered 23 stones (one large mass, 522 g, and 22 small fragments, <20 g; total known mass, 576.77 g) in the Moroccan Sahara. Rocks are greenish-brown and partially coated by desert varnish; no fusion crust; cracks filled with terrestrial calcium carbonate. Thin shock veins and small melt pockets are abundant. Classification, mineralogy and bulk chemistry (J-A. Barrat, UAng; A. Jambon, UPVI; M. Bohn, I-CB; Ph. Gillet, ENSL; V. Sautter, MNHNP; Ch. Göpel, IPGP; M. Lesourd, SCIAM): consists of olivine (50 µm to 2 mm) in a fine-grained groundmass (average grain size ~100 µm) of euhedral to subhedral pyroxene crystals and interstitial maskelynite; minor phases are chromite, Ti-chromite, ilmenite, ulvöspinel, sulfides, merrillite, apatite, and a K-rich mesostasis; impact melt pockets (up to 1.5 mm long) contain pyrrhotite spherules. Modal abundances of impact melt pockets and calcite free areas: 52 vol% pyroxenes, 22% maskelynite, 21% olivine, 2% phosphates, 2% opaque oxides and sulfides, and 1% K-rich mesostasis. Mineralogy: olivine (Fa28 to Fa58); pyroxenes: pigeonite (En57Wo5Fs28 to En40Wo13Fs47; fe# (100 Fe/(Fe + Mg) = 29–54 atom%) and augite (En55Wo21Fs24 to En35Wo28Fs36; fe# = 29–51 atom%) are present as separate crystals in roughly equal volume proportions; maskelynite is zoned (An53Ab45Or2 to An49Ab48Or3) but is locally An-poor (An35Ab57Or8); FeO-rich merrillite (FeO 1.3 and 2.8 wt%); apatites, Cl 0.5–2.5 wt% and F 1.1–6.4 wt%; chromite have Ti-rich rims; ulvöspinels contain fine ilmenite lamellae (<1 µm thick). An interstitial K-rich component, probably a shock-produced glass of alkali feldspar and silica, is generally associated with Fe-Ti oxides. Bulk chemistry: Al-poor ferroan basaltic rock, rich in MgO with major element abundances similar to those reported for EETA79001 lithology A.  Key element weight ratios are Fe/Mn = 45, Al/Ti = 6.6, Na/Ti = 1.83, and Na/Al = 0.28.  REE pattern is similar to Shergotty, Zagami, and Los Angeles. Specimens: type specimen, 20 g and 2 polished sections, ENSL; main mass, Fectay.

Data from:
  Table 6
  Line 103:
Origin or pseudonym:Louise Michel
Date:Apr 2001
Mass (g):576.77
Comments:paired with NWA 1049 [Ed: this is clearly an error in MB86. It probably should have said NWA 1110]
   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)
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)
I-CB: Institut Français de recherché pour l’exploitation de la mer Brest, BP70, F-29280 Plouzané Cedex, France (institutional address)
IPGP: Institute de Physique du Globe de Paris, 1 rue Jussieu, 75252 Paris, Cedex 05, France (institutional address; updated 3 Nov 2014)
SCIAM: Service Commun d'Imageries et d'Analyses Microscopiques, 2 Rue Haute de Reculée, F-49045 Angers Cedex, France (institutional address)
UAng: Université d'Angers, Faculté des Sciences, 2 bd Lavoisier, 49045 Angers Cedex, France (institutional address)
References: Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
Find references in NASA ADS:
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Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut   
The Hupe Collection      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
ale bartolommei-giulio M.   
Brice D. Hornback   
Edward Krikorian   
George Barclay   
Gerald Armstrong   
MeteoriteCollector.org - FCOM - Russ Finney            

     This is 1 of 6592 approved meteorites from (Northwest Africa) (plus 2020 unapproved names)
Synonymshelp: Louise Michel (From MetBase)

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