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地點:據來自阿爾及利亞-摩洛哥從仲介機構購買。
發現:2005

類型:火星輝玻無球粒隕石,火星隕石(玄武shergottite)

Petrography: A medium-grained (<3.1 mm greatest dimension) basaltic shergottite that consists of ~57.3 vol% augite and pigeonite pyroxenes, and 38.3 vol% plagioclase (present as shock-formed maskelynite and glasses) with minor opaques (2.7 vol%) and phosphates (1.7 vol%) arranged in a weakly foliated subophitic to granular texture. Accessory phases include ulvöspinel, ilmenite, chlorapatite, merrillite, pyrrhotite, Si-Al-Na-K-rich glasses, and baddeleyite. Vesicular black glass veins (<3 mm in width) and pockets (up to 6 mm) are prominent. Geochemistry: Pigeonite (Fs35.2-57.6Wo12.6-16.5; and augite (Fs27.2-41.5 Wo30.8-35.2) show mottled compositional zoning. Fe-rich margins of pigeonite contain very thin (0.2-0.5 µm) orthopyroxene exsolution lamellae. Maskelynite is compositionally homogeneous An55Or1.8 in contrast to mesostasis maskelynite (An48-60Or9.2) and glasses. Melt inclusions (15-60 µm, longest dimension) in ulvöspinel have rims of Fe-rich pigeonite (Fs73.5Wo5.8), merrillite, and pyrrhotite; cores are Si-Al-K-Na-rich glass. Bulk composition: Calculated average bulk composition based on analyzed phases and their modes of three melt inclusions is: SiO2 = 70.2, Al2O3 = 8.5, TiO2 = 0.8, FeO = 2.1, MnO = 0.2, MgO = 2.35, CaO = 3.5, Na2O = 0.95, K2O = 2. 1, and P2O5 = 2.8 (all wt%) with trace amounts of NiO, CoO, and S. One melt inclusion contains only fayalite (Fa84) mantled around a core of glass (K2O = 6.4, SiO2 = 78; both wt%). From Meteoritical Bulletin Database.
Paired to NWA 2986, NWA 4766, NWA 4783 and perhaps others. Numerous parcels of this meteorite have been sold in Morocco. I don't expect that every parcel will get its own number. Most likely it will be known as NWA 2975 since that is the number associated with the best description. The meteorites listed on this page are paired to these and to NWA 2975.

中国陨石交易网提供陨石学大图供陨石爱好者比对

中国陨石市场-将星比心销售NWA 2975火星輝玻無球粒陨石

NWA 2975 Meteorite for sale http://www.chinameteorites.com/




 
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品名 :NWA 2975阿爾及利亞火星玄武岩无球粒陨石
編號 :NWA29750.06
價格 :NTD 3000
    RMB: 612


品名 :NWA 2975阿爾及利亞火星玄武岩无球粒陨石
編號 :NWA29750.07
價格 :NTD 3600
    RMB: 735


品名 :NWA 2975阿爾及利亞火星玄武岩无球粒陨石
編號 :NWA29750.09
已售出


品名 :NWA 2975阿爾及利亞火星玄武岩无球粒陨石
編號 :NWA29750.09-1
價格 :NTD 4800
    RMB: 980

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