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Northwest Africa 1195
Basic information Name: Northwest Africa 1195
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1195
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 315 g
NHM Catalogue:  5th Edition  (2000)  Martian (shergottite)
Meteoritical Bulletin:  MB 87  (2003)  Martian (basaltic shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-basaltic (ol phyric)
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 1195


Purchased 2002 March/April

Martian meteorite (basaltic shergottite)

A. and G. Hupé (Hupé) purchased a 50 g fragment of a broken stone with a distinctive, thin weathering rind collected by nomads near Safsaf, Morocco in 2002 March, and subsequently purchased the remainder of the same elongated stone (total weight 315 g). Dimensions of the reassembled stone are 133 mm × 43 mm × 37 mm. Classification and mineralogy (A. Irving and S. Kuehner, UWS): olivine megacrysts (up to 4 mm) are set in a groundmass of low-Ca pyroxene and maskelynite (Ab37Or0.5 to Ab41Or0.7) with minor Ti-chromite, pyrrhotite, ilmenite and Mg-bearing merrillite. The euhedral to subhedral shapes of most of the olivine grains suggest that they are phenocrysts rather than xenocrysts. Olivine exhibits strong compositional zoning (cores Fa19, FeO/MnO = 54; rims Fa40, FeO/MnO = 62) and contains abundant inclusions of chromite, clinopyroxene, orthopyroxene, and pyrrhotite. The groundmass low-Ca pyroxenes are zoned from cores of pigeonite (Wo7Fs26, FeO/ MnO = 37.1) or, less commonly, orthopyroxene (Wo4Fs23, FeO/MnO = 37.0) to rims of more Fe-rich pigeonite (Wo12Fs33, FeO/MnO = 36.6). Occurring very rarely on groundmass pyroxene grains are patchy overgrowths of an Fe-rich mineral (possibly related to chamosite or chlorite, with 35 wt% FeO, 5 wt% Al2O3, 1.5 wt% MgO and a low oxide sum of 85 wt%, suggesting the presence of water or hydroxyl). Calcite occurs sparsely along grain boundaries and as thin veinlets. Texture and mineral compositions are similar to those in olivine-phyric basaltic shergottite DaG 476/670, but olivine is much more magnesian than in other olivine­phyric basaltic shergottites SaU 005/008 and NWA 1068/ 1110. Specimens: type specimen, 20 g, and two polished thin sections, UWS; main mass, xHupé.

Data from:
  Table 8
  Line 47:
Origin or pseudonym:Safsaf
Place of purchase:Zagora
Date:P Feb 2002
Mass (g):315
Classifier:A. Irving, UWS
Type spec mass (g):10
Main mass:ROM
Comments:see separate entry
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
xHupé: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
References: Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
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     This is 1 of 9772 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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