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.
Scientific abstracts and news regarding NWA 1195:
Brandon A.D., Putchel I.S., Walker R.J., Day J.M.D., Irving A.J. and Taylor L.A.
(2012) Evolution of the Martian mantle inferred from the 187Re-187Os isotope and high
siderophile element systematics of the Shergottite meteorites. Geochim. Cosmochim. Acta 76, 206-235. http://www.freewebs.com/jmdday/Papers/brandonetal_gca_2012.pdf
Irving A.J., Kuehner S.M., Tanaka R., Herd C.D.K., Chen G. and Lapan T.J.
(2012b) The Tissint depleted permafic olivine-phyric Shergottite: Petrologic, elemental and isotopic
characterization of a recent Martian Fall in Morocco (abs#2510). Lunar Planet. Sci.XLIII,
Lunar Planetary Institute @The Woodlands. http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2510.pdf
Kuehner S.M., Irving A.J., Herd C.D.K., Gellissen M., Lapan T.J. and Rumble D.
(2011) Pristine olivine-phyric Shergottite NWA 6162:
A primitive magma with accumulated crystals derived from depleted Martian mantle (abs#1610).
42nd Lunar Planet. Sci. Conf.
Lunar Planetary Institute @ The Woodlands. http://www.lpi.usra.edu/meetings/lpsc2011/pdf/1610.pdf
(invited review with great pictures of textures) Rumble D. and Irving A.J.
(2009) Dispersion of oxygen isotopic compositions among 42 Martian meteorites determined by
laser fluorination: Evidence for assimilation of (ancient) altered crust (abs#2293). Lunar Planet. Sci.XL,
Lunar Planetary Institute @ The Woodlands. http://www.lpi.usra.edu/meetings/lpsc2009/pdf/2293.pdf
Brandon A.D., Walker R.J., Putchel I.S. and Irving A.J.
(2008) Re-Os isotopic systematics of the Shergottite ‘depleted’ end-member (abs#1404). Lunar Planet. Sci. XXXIX
Lunar Planetary Institute, Houston. http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1404.pdf
Symes S.J., Borg L.E. and Shearer C.K. and Irving A.J.
(2008) The age of the Martian meteorite Northwest Africa 1195 and the
differentiation history of the Shergottites. Geochim. Cosmochim.Acta72, 1696-1710. http://www.sciencedirect.com/science/article/pii/S0016703708000343
Puchtel I.S., Walker R.J., Brandon A.D. and Irving A.J.
(2008) Highly siderophile element abundances in SNC meteorites: An update (abs#1650). Lunar Planet. Sci.XXXIX
Lunar Planetary Institute, Houston. http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1650.pdf
Shearer C.K., Burger P.V., Papike J.J., Borg L.E., Irving A.J. and Herd C.
(2008b) Petrogenic linkages among Martian basalts: Implications based on trace element chemistry of olivine. Meteorit. & Planet. Sci. 43, 1241-1258.
Shearer C.K., Borg L.E., Papike J.J., Chaklader J., Symes S.J., Irving A.J. and Herd C.D.K.
(2005) Do early liquidus phases in olivine-phyric Martian basalts reflect the characteristics of their
mantle sources? Insights from NWA1110, NWA1195 and NWA2046 (abs#1193). Lunar Planet. SciXXXVI,
Lunar Planetary Institute, Houston. http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1193.pdf
Symes S.J., Borg L.E., Shearer C.K., Asmerom Y. and Irving A.J.
(2005) Geochemistry of NWA 1195 based on Rb-Sr and Sm-Nd isotopic systematics (abs#1435). Lunar Planet. Sci.XXXVI
Lunar Planetary Institute, Houston.
Irving A.J., Bunch T.E., Kuehner S.M. and Wittke J.H.
(2004a) Petrology of primitive olivine orthopyroxene-phryic Shergottites NWA2046 and NWA1195:
Analogies with terrestrial boninites and implications for partial melting of hydrous Martian mantle (abs#1444). Lunar Planet. Sci.XXXV
Lunar Planetary Institute, Houston. http://www.lpi.usra.edu/meetings/lpsc2004/pdf/1444.pdf
Nishiizumi K., Hillegonds D.J., McHargue L.R. and Jull A.J.T.
(2004) Exposure and terrestrial histories of lunar and Martian meteorities (abs#1130). Lunar Planet. Sci. XXXV
Lunar Planetary Institute, Houston. http://www.lpi.usra.edu/meetings/lpsc2004/pdf/1130.pdf
Russell Sara, Zipfel J., Folco Luigi, Jones R., Grady M.M., McCoy T. and Grossman J.N.
(2003) The meteoritical bulletin, No. 87, 2003 July. Meteorit. & Planet. Sci.38, A189-248.
Irving A.J., Kuehner S.M., Hupé A.C. and Hupé G.M.
(2002b) Olivine-phyric basaltic Shergottite NWA1195:
A very primitive Martian lava (abs). Meteorit. & Planet. Sci.37, A69. http://adsabs.harvard.edu/full/2002M%26PSA..37R..69I
First 50 gram piece of NWA 1195 received.
First cut of 50 gram specimen reveals its Martian origin.
Description coming Soon!
Description coming Soon!
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