NWA 17755 - 碳质球粒陨石 (CV3) - 50 g





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NWA 17755 是一块碳质球粒陨石(CV3),来自西北非洲撒哈拉沙漠,重量为 50 g。
卖家的描述
Northwest Africa 17755 (NWA 17755)
(西北非洲)
Purchased: 2024 Jan
购买日期:2024年1月
Classification: Carbonaceous chondrite (CV3)
分类:碳质球粒陨石(CV3)
History: Mitchell Wright purchased multiple stones from Ahmad Aide. Place and date of find, unknown.
历史:Mitchell Wright 从 Ahmad Aide 处购买了多块陨石。发现地点和日期未知。
Petrography: (C. Herd and W. Bannerman, UAb) Optical and microprobe examination of a polished thin section shows PO and POP chondrules, CAIs and AOAs (~5-10 vol%) in a clastic matrix that comprises ~40 vol% of the sample. Average chondrule size 0.8±0.5 mm (n=42). Metal is present within chondrules, whereas the matrix has been extensively oxidized.
岩石学: (C. Herd 与 W. Bannerman,UAb)对一块抛光薄片的光学与微探针检查显示 PO 与 POP 短星粒、CAI 与 AOA(约5-10体积%)分布于一个碎屑状基质中,该基质约占样品体积的40%。平均球粒大小为0.8±0.5 mm(n=42)。球粒内部存在金属,而基质已被广泛氧化。
Geochemistry: (C. Herd, W. Bannerman, and A. Locock, UAb) Data obtained by EMP examination of carbon-coated thin section: no matrix olivine (too altered); chondrule olivine: Fa4.3±6.0 (range 0-31; n=27); chondrule opx: Fs0.7±0.1En97.4±2.1Wo1.9±2.0 (Fs range 0.6-0.8; n=2); chondrule cpx: Fs0.8±0.1En58.2±7.3Wo41±7.4 (n=6).
地球化学: (C. Herd、W. Bannerman 与 A. Locock,UAb)通过碳包覆薄片的电子显微探针分析得到的数据:无基质橄榄石(变化太大);球粒橄榄石:Fa4.3±6.0(范围0-31;n=27);球粒斜长石(opx): Fs0.7±0.1 En97.4±2.1 Wo1.9±2.0(Fs范围0.6-0.8;n=2);球粒斜方辉石(cpx): Fs0.8±0.1 En58.2±7.3 Wo41±7.4(n=6)。
Classification: CV3 chondrite
分类:CV3 球粒陨石
I am a member of the Meteoritical Society (#7743) and have been collecting meteorites for over 15 years.
我是陨石学会成员(编号 #7743),从事陨石收藏已有15年以上。
Northwest Africa 17755 (NWA 17755)
(西北非洲)
Purchased: 2024 Jan
购买日期:2024年1月
Classification: Carbonaceous chondrite (CV3)
分类:碳质球粒陨石(CV3)
History: Mitchell Wright purchased multiple stones from Ahmad Aide. Place and date of find, unknown.
历史:Mitchell Wright 从 Ahmad Aide 处购买了多块陨石。发现地点和日期未知。
Petrography: (C. Herd and W. Bannerman, UAb) Optical and microprobe examination of a polished thin section shows PO and POP chondrules, CAIs and AOAs (~5-10 vol%) in a clastic matrix that comprises ~40 vol% of the sample. Average chondrule size 0.8±0.5 mm (n=42). Metal is present within chondrules, whereas the matrix has been extensively oxidized.
岩石学: (C. Herd 与 W. Bannerman,UAb)对一块抛光薄片的光学与微探针检查显示 PO 与 POP 短星粒、CAI 与 AOA(约5-10体积%)分布于一个碎屑状基质中,该基质约占样品体积的40%。平均球粒大小为0.8±0.5 mm(n=42)。球粒内部存在金属,而基质已被广泛氧化。
Geochemistry: (C. Herd, W. Bannerman, and A. Locock, UAb) Data obtained by EMP examination of carbon-coated thin section: no matrix olivine (too altered); chondrule olivine: Fa4.3±6.0 (range 0-31; n=27); chondrule opx: Fs0.7±0.1En97.4±2.1Wo1.9±2.0 (Fs range 0.6-0.8; n=2); chondrule cpx: Fs0.8±0.1En58.2±7.3Wo41±7.4 (n=6).
地球化学: (C. Herd、W. Bannerman 与 A. Locock,UAb)通过碳包覆薄片的电子显微探针分析得到的数据:无基质橄榄石(变化太大);球粒橄榄石:Fa4.3±6.0(范围0-31;n=27);球粒斜长石(opx): Fs0.7±0.1 En97.4±2.1 Wo1.9±2.0(Fs范围0.6-0.8;n=2);球粒斜方辉石(cpx): Fs0.8±0.1 En58.2±7.3 Wo41±7.4(n=6)。
Classification: CV3 chondrite
分类:CV3 球粒陨石
I am a member of the Meteoritical Society (#7743) and have been collecting meteorites for over 15 years.
我是陨石学会成员(编号 #7743),从事陨石收藏已有15年以上。

