陨石。迪欧根岩—异常型,(Djebel Chaab 004). 罕见且难以获取。这是仅有的13块被批准归类为 Diogenite-an 的陨石之一。 - 11.49 g - (1)





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Djebel Chaab 004 陨石,异常 Diogenite 陨石,来自阿尔及利亚的Adrar,是经批准的 Diogenite-an 仅13例之一,重量 11.49 g。
卖家的描述
Djebel Chaab 004 (Cha 004) 25.33805°N, 1.14363°E
Adrar, Algeria
Find: 2022 Dec 27
Classification: HED 无球粒陨石(Diogenite,异常)
History: 据报道,一群陨石猎人于2022年12月27日在阿尔及利亚的 Djebel Chaab DCA 发现了若干该材料的碎片。
Petrography (K. Metzler, IfP): 多晶无球粒凝聚角砾岩,由矿物碎片和少量岩质碎片(Diogenitic 与 Eucritic)嵌入在细粒相关碎屑中。材料经冲击压实,存在细小的冲击脉。Diogenite 成分占>90体积分。此角砾岩以橄榄石和低钙辉石碎片为主,化学成分的变异范围异常大。Eucrite 成分以矿物碎片(分解的辉石、斜长石、SiO2 多晶型)以及小型岩质碎片的形态存在。辅料包括 Cr-spinel 和Ni 含量金属(3-4 wt% Ni)。
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: 高
Weathering grade: 低
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 无球粒陨石(Diogenite,异常)
History: 据报道,一群陨石猎人于2022年12月27日在阿尔及利亚的 Djebel Chaab DCA 发现了若干该材料的碎片。
Petrography (K. Metzler, IfP): 多晶无球粒凝聚角砾岩,由矿物碎片和少量岩质碎片(Diogenitic 与 Eucritic)嵌入在细粒相关碎屑中。材料经冲击压实,存在细小的冲击脉。Diogenite 成分占>90体积分。此角砾岩以橄榄石和低钙辉石碎片为主,化学成分的变异范围异常大。Eucrite 成分以矿物碎片(分解的辉石、斜长石、SiO2 多晶型)以及小型岩质碎片的形态存在。辅料包括 Cr-spinel 和Ni 含量金属(3-4 wt% Ni)。
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: 高
Weathering grade: 低
Classifier: K. Metzler, IfP
This lot comes with certificate of authenticity.
Thanks for your interest.

