Manganese oxides in Martian meteorites Northwest Africa (NWA) 7034 and 7533

Rare-earth Minerals in Martian Meteorite Nwa 7034/7533: Evidence for Fluid-rock Interaction in the Martian Crust

Evidence for a widespread basaltic breccia component in the martian low-albedo regions from the reflectance spectrum of Northwest Africa 7034

Northwest Africa (NWA) 7034 is the first breccia meteorite from Mars, and unlike the shergottite, nakhlite, and chassignite (SNC) martian meteorites, it matches the estimated chemical composition of martian crust. Here we show that the visible-infrared reflectance spectrum of NWA 7034 is unique compared to other SNCs and is more similar than them to remotely sensed data from Mars, suggesting th...

Unique meteorite from early Amazonian Mars: water-rich basaltic breccia Northwest Africa 7034.

We report data on the martian meteorite Northwest Africa (NWA) 7034, which shares some petrologic and geochemical characteristics with known martian meteorites of the SNC (i.e., shergottite, nakhlite, and chassignite) group, but also has some unique characteristics that would exclude it from that group. NWA 7034 is a geochemically enriched crustal rock compositionally similar to basalts and ave...

Metal-saturated sulfide assemblages in NWA 2737: Evidence for impact-related sulfur devolatilization in Martian meteorites

NWA 2737, a Martian meteorite from the Chassignite subclass, contains minute amounts (0.010 ± 0.005 vol%) of metal-saturated Fe-Ni sulfides. These latter bear evidence of the strong shock effects documented by abundant Fe nanoparticles and planar defects in Northwest Africa (NWA) 2737 olivine. A Ni-poor troilite (Fe ⁄S = 1.0 ± 0.01), sometimes Cr-bearing (up to 1 wt%), coexists with micrometer-...

Nwa 1465* and Nwa 1665*: Two Unusual Carbonaceous Chondrites from Northwest Africa

NORTHWEST AFRICA. Ansgar Greshake, Robert N. Clayton, Toshiko K. Mayeda and Matthias Kurz, Museum für Naturkunde, Institut für Mineralogie, Humboldt-Universität zu Berlin, Invalidenstr. 43, 10115 Berlin, Germany, email: [email protected], Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA, Schillerstraße 7, 34626 Neukirchen, Germany. *provisional names not...