间质陨石。 (NWA 18216) 无底价。 - 11.75 g - (1)
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美塞索代里型隕石，NWA 18216，来自毛里塔尼亚努瓦迪布，重量11.75 g，附真实性证书。
AI辅助摘要
卖家的描述
Northwest Africa 18216 (NWA 18216)
Mauritania
Purchased: 2025
Classification: Mesosiderite
History: The material was purchased in Nouadhibou, Mauritania, in 2025 by Mohamed Ali Loud from a meteorite dealer.
Physical characteristics: Several dark brownish rocks lacking fusion crust.
Petrography: The meteorite displays a dark brownish interior and is composed of silicate (about 65 vol%) and metallic (about 35 vol%) portions. The silica fraction predominantly consists of up to 5 mm sized low-Ca-pyroxene and calcic plagioclase. Many pyroxenes contain blebby and lamellar augite exsolutions. Metal is partly altered and mostly kamacite with less abundant taenite. Minor phases include silica, troilite, chromite, and merrillite.
Geochemistry: low-Ca pyroxene: Fs33.5±0.2Wo3.3±0.3 (Fs33.1-33.9Wo2.7-3.6, FeO/MnO=22-25, n=7); Ca-pyroxene exsolutions: Fs15.7±0.7Wo41.9±1.3 (Fs15.1-16.9Wo39.8-43.0, FeO/MnO=19-21, n=7); calcic plagioclase: An91.3±1.2 (An90.1-93.2, n=7)
Shock stage: low
Weathering grade: moderate
Classifier: A. Greshake, MNB
This lot comes with certificate of authenticity.
Thanks for your interest.
Northwest Africa 18216 (NWA 18216)
Mauritania
Purchased: 2025
Classification: Mesosiderite
History: The material was purchased in Nouadhibou, Mauritania, in 2025 by Mohamed Ali Loud from a meteorite dealer.
Physical characteristics: Several dark brownish rocks lacking fusion crust.
Petrography: The meteorite displays a dark brownish interior and is composed of silicate (about 65 vol%) and metallic (about 35 vol%) portions. The silica fraction predominantly consists of up to 5 mm sized low-Ca-pyroxene and calcic plagioclase. Many pyroxenes contain blebby and lamellar augite exsolutions. Metal is partly altered and mostly kamacite with less abundant taenite. Minor phases include silica, troilite, chromite, and merrillite.
Geochemistry: low-Ca pyroxene: Fs33.5±0.2Wo3.3±0.3 (Fs33.1-33.9Wo2.7-3.6, FeO/MnO=22-25, n=7); Ca-pyroxene exsolutions: Fs15.7±0.7Wo41.9±1.3 (Fs15.1-16.9Wo39.8-43.0, FeO/MnO=19-21, n=7); calcic plagioclase: An91.3±1.2 (An90.1-93.2, n=7)
Shock stage: low
Weathering grade: moderate
Classifier: A. Greshake, MNB
This lot comes with certificate of authenticity.
Thanks for your interest.
详细资料
物品件数
1
陨石名称
Mesosiderite Meteorite.
陨石类型
(NWA 18216) No reserve price.
重量
11,75 g
国家
NWA
