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Northwest Africa 856
Basic information Name: Northwest Africa 856
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 856
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 320 g
NHM Catalogue:  5th Edition  (2000)  Martian (shergottite)
Meteoritical Bulletin:  MB 86  (2002)  Martian (basaltic shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-basaltic
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 288 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Writeup from MB 86:

Northwest Africa 856


Found 2001 March

Martian meteorite (basaltic shergottite)

A single stone of 320 g was found in Morocco in 2001 March. The exact location of find is unknown and the meteorite was referred to under the pseudonym "Djel Ibone". The meteorite has a fine-grained basaltic texture consisting mainly of pyroxene (70 vol%) and maskelynite (23 vol%). Accessory minerals include merrillite, apatite, pyrrhotite, chromite, Fe-Ti oxides, silica (stishovite) and baddeleyite. Melt pockets with phenocrysts and submicrometer-sized needles of stishovite are present. Pyroxenes are highly fractured. Calcite veins formed by terrestrial weathering crosscut the specimens. Classifica­tion and mineralogy (A. Jambon, UPVI; V. Sautter, MNHNP; Ph. Gillet, ENSL): pyroxenes are pigeonite, En48Fs39Wo13, and augite, En36Fs32Wo32; maskelynite composition is An41–47Ab57–51Or2. Geochemistry (J-A. Barrat, UAng and Ch. Göpel, IPGP): bulk composition in wt% is 0.81 TiO2, 6.83 Al2O3, 17.8 FeO*, 0.49 MnO, 9.51 MgO, 10.2 CaO, 1.28 Na2O, 0.13 K2O. Trace elements, 77 ppm Ni and a REE pattern similar to that of Shergotty and Zagami. Key element weight-ratios are FeO*/MnO ≈ 30, Na/Al ≈ 0.40, K/La of 500 and Ga/Al of 4.1 × 10–4. Abundances of Ba and Sr and the Th/U ratio indicate that terrestrial weathering is minor.  Specimens: type specimen, 16 g, ENSL; main mass, Fectay.

Data from:
  Table 6
  Line 63:
Origin or pseudonym:Djel Ibone
Date:Mar 2001
Mass (g):320
   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)
IPGP: Institute de Physique du Globe de Paris, 1 rue Jussieu, 75252 Paris, Cedex 05, France (institutional address; updated 3 Nov 2014)
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)
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Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut   
Don Edwards   
Matteo Chinellato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
MeteoriteCollector.org - FCOM - Russ Finney      

     This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)
Synonymshelp: Djel Ibone (In NHM Cat; Changed from Northwest Africa 854)

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