陨石。Diogenite - 异常的,(Djebel Chaab 004) 罕见且难以获得。这是仅有的13块被批准归类为 Diogenite-an 的陨石之一。 - 3.57 g - (1)





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Djebel Chaab 004 隕石, Diogenite 異常型隕石,來自阿拉伯阿德拉爾,阿爾及利亞(僅有13件通過認證的 Diogenite-an 之一),重3.57克,附真實性證書。
賣家描述
Djebel Chaab 004 (Cha 004) 25.33805°N, 1.14363°E
Adrar, Algeria
Find: 2022 Dec 27
Classification: HED 断裂类陨石(Diogenite,异常)
History: 据报道,一组陨石猎人在2022年12月27日于阿尔及利亚 Djebel Chaab DCA 地区发现了该物质的若干碎片。
Petrography (K. Metzler, IfP): 多岩质超陨石角砾岩,含矿物碎片与少量岩质碎屑(二氧镁辉石-型与欧克石型),嵌入在细粒相关碎屑中。材料在冲击作用下被压实,存在细小的冲击脉。Diogenite 成分占比>90体积%。该角砾岩以橄榄石与低-Ca辉石碎片为主,化学组成范围异常广泛。欧克石成分以矿物碎片(分解辉石、斜长石、SiO2 多晶相)与小岩质碎屑的形态存在。辅助相包括 Cr-自旋磁铁矿与含镍金属(镍含量3-4 wt%)。
Geochemistry: Mineral compositions and geochemistry: Diogenitic clasts: Mean olivine composition: Fa15.9±5.8 (Fa8.7-28.4); Fe/Mn (at.): 44.8; n=18. Mean pyroxene composition: Fs23.5±5.9Wo2.3±1.1 (Fs11.9-31.2Wo0.4-3.9); Fe/Mn (at.): 28; n=15. Eucrite clasts: Mean composition of low-Ca pyroxene (host): Fs63.3±0.3Wo2.4±0.4 (Fs62.8-63.7Wo1.9-2.8); Fe/Mn (at.): 33; n=5. Mean composition of Ca-rich pyroxene (exsolution lamellae): Fs25.7±4.5Wo40.7±1.8 (Fs21.2-31.5Wo36.6-42.2); Fe/Mn (at.): 33; n=11. Mean plagioclase composition: An89.6±5.1Or0.4±0.5 (An78.3-95.1Or0.0-1.5); n=15.
Classification: Diogenite (polymict, anomalous). The diogenite component is characterized by unusually large chemical variations of both olivine and pyroxene, which distinguishes this rock from other polymict diogenites.
Shock stage: high
Weathering grade: low
Classifier: K. Metzler, IfP
This lot comes with certificate of authenticity.
Thanks for your interest.
Djebel Chaab 004 (Cha 004) 25.33805°N, 1.14363°E
Adrar, Algeria
Find: 2022 Dec 27
Classification: HED 断裂类陨石(Diogenite,异常)
History: 据报道,一组陨石猎人在2022年12月27日于阿尔及利亚 Djebel Chaab DCA 地区发现了该物质的若干碎片。
Petrography (K. Metzler, IfP): 多岩质超陨石角砾岩,含矿物碎片与少量岩质碎屑(二氧镁辉石-型与欧克石型),嵌入在细粒相关碎屑中。材料在冲击作用下被压实,存在细小的冲击脉。Diogenite 成分占比>90体积%。该角砾岩以橄榄石与低-Ca辉石碎片为主,化学组成范围异常广泛。欧克石成分以矿物碎片(分解辉石、斜长石、SiO2 多晶相)与小岩质碎屑的形态存在。辅助相包括 Cr-自旋磁铁矿与含镍金属(镍含量3-4 wt%)。
Geochemistry: Mineral compositions and geochemistry: Diogenitic clasts: Mean olivine composition: Fa15.9±5.8 (Fa8.7-28.4); Fe/Mn (at.): 44.8; n=18. Mean pyroxene composition: Fs23.5±5.9Wo2.3±1.1 (Fs11.9-31.2Wo0.4-3.9); Fe/Mn (at.): 28; n=15. Eucrite clasts: Mean composition of low-Ca pyroxene (host): Fs63.3±0.3Wo2.4±0.4 (Fs62.8-63.7Wo1.9-2.8); Fe/Mn (at.): 33; n=5. Mean composition of Ca-rich pyroxene (exsolution lamellae): Fs25.7±4.5Wo40.7±1.8 (Fs21.2-31.5Wo36.6-42.2); Fe/Mn (at.): 33; n=11. Mean plagioclase composition: An89.6±5.1Or0.4±0.5 (An78.3-95.1Or0.0-1.5); n=15.
Classification: Diogenite (polymict, anomalous). The diogenite component is characterized by unusually large chemical variations of both olivine and pyroxene, which distinguishes this rock from other polymict diogenites.
Shock stage: high
Weathering grade: low
Classifier: K. Metzler, IfP
This lot comes with certificate of authenticity.
Thanks for your interest.

