2025年3月3日 · NWA 2800 is a complete and lightly weathered stone with significant desert ablation that has eroded most of the fusion crust and imparted a dull to shiny sheen to the surface.

NWA 2800 – 686 grams Enriched Basaltic Shergottite Mineralogical Mode for NWA2800 Bunch et al. 2008 Plagioclase 47 vol. % Pyroxene 39 Symplectite 10 Residuum 2 Oxides 2 Introduction Bunch et al. (2008) announced another large basaltic rock from Mars – NWA2800 – that appears to be similar to the Los Angeles specimens. It has a coarse ophitic

Based on oxygen isotope data and mineralogical studies, KG 002 is a coarse-grained basaltic shergottite similar to Los Angeles and NWA 2800 and is probably the feldspar (maskelynite)-richest rock among the Martian meteorites.

2008年3月1日 · Similar complex and irregular zonings are also observed in the enriched basaltic shergottites Los Angeles, NWA 2800, NWA 5298, and NWA 2975 (Warren et al., 2004; Bunch et al., 2008; Hui et al...

We report new chemical abundances for four shergottites for which no published data are reported, including NWA 2800, NWA 5214, NWA 6148, and Y-000097. The new data contribute significantly to the available volatile siderophile and chalcophile element abundances.

Chemical Composition of Four Shergottites from Northwest Africa (NWA 2800, NWA, 5214, NWA 5990, NWA 6342) Shergottites represent the majority of recovered Martian meteorites. As basic igneous rocks, they formed from magmas that were emplaced in the Martian crust [1].

compositions measured on NWA 2800 and NWA 5214 defining the two extremes. Compared to other sher-gottites, NWA 5214, NWA 2800 and Los Angeles are closer to the plagioclase end, which is consistent with their enriched REE pattern. Fig. 2B shows that the shergottites exhibit near CI chondrite ratios for Zr/Hf. The depleted shergottites (NWA 5990 ...

thus infer that NWA 2800 is a highly evolved, “en-riched” basaltic shergottite derived by prolonged frac-tional crystallization of more primitive magmas like NWA 1068 and NWA 4468 [3], and that Shergotty, Zagami and NWA 3171 [4] are intermediate samples in the liquid line of descent.

2015年1月12日 · 历史和物理特性：2007年7月，一位不知名的收藏家购买自摩洛哥，陨石质量为686克。 NWA2800是一块完整的，风化轻微的陨石，沙漠风化导致陨石已经被侵蚀掉了大部分的熔壳，表面呈沙漠漆光泽。 岩相学：（T. Bunch and J. Wittke, NAU: A. Irving, UWS）这块玄武岩shergottite陨石非常粗粒度，陨石辉绿结构，但主要为亚辉绿结构，细长的晶体连同三斜铁辉石分离阶段矿物。 矿物晶体熔长石尺寸长达6毫米，一些辉石晶体片尺寸为7.3×0.4毫米。 易变辉 …

NWA 6342 is an intermediate, ultramafic, poikilitic shergottite that was found in Algeria in 2010. As the poikilitic shergottite-group meteorites are thought to have originated from the same…