Bechar 008 - 高质量无球粒陨石标本（风化程度低） - 32.5 g
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Bechar 008，高品质的阿尔及利亚贝查尔陨石样本，重量32.5克。
AI辅助摘要
卖家的描述
Bechar 008 30.25293 N, 3.53005 W
Bechar, Algeria
Purchased: 2022 Jul
Classification: HED achondrite (Howardite)
History: Reportedly a group of meteorite hunters found several fragments of this material in Algeria, in an area called Alagla (near Abadla) in July 2022. Several months later Mohamed Ali Loud bought a total of 1700 g from a meteorite dealer in Mauritania.
Petrography (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments and lithic clasts up to ~5 mm in size. These components are embedded in a fine-grained clastic matrix of related debris. Lithic clasts are dominated by eucritic gabbros and granulites, both of which show exsolved pyroxene. Mineral fragments include various eucritic pyroxenes (with and without augite exsolution lamellae), diogenitic pyroxene, feldspar, a silica polymorph, chromite, ilmenite, and Fe-Ni metal. About 10-20 vol% diogenitic components.
Geochemistry: Mineral compositions and geochemistry: Gabbro clast: Low-Ca pyroxene (host): Fs60.6±0.5 Wo3.1±0.2 (Fs59.9-61.2 Wo2.8-3.3); mean Fe/Mn (at.): 30.3; n=6. Ca-rich pyroxene (exsolution lamellae) Fs28.8±1.4 Wo40.9±1.5 (Fs27.4-30.5 Wo38.8-42.6); mean Fe/Mn (at.): 31.5; n=6. Plagioclase: An86.8±1.8 Or0.3±0.3 (An85.4-89.4 Or0.0-0.8); n=6. Diogenitic pyroxene: Fs22.5±0.5 Wo2.0±0.3 (Fs21.5-23.2 Wo1.5-2.4); mean Fe/Mn (at.): 32.6; n=7. Plagioclase fragments from clastic matrix: An89.6±3.6 Or0.5±0.4 (An82.5-95.7 Or0.1-1.1); n=11.
Classification: Howardite, based on mineral chemistry, variety of eucritic lithologies, and occurrence of >10 vol% of diogenitic components.
I am a member of the Meteoritical Society (#7743) and have collecting meteorites for more than 15 years.
Bechar 008 30.25293 N, 3.53005 W
Bechar, Algeria
Purchased: 2022 Jul
Classification: HED achondrite (Howardite)
History: Reportedly a group of meteorite hunters found several fragments of this material in Algeria, in an area called Alagla (near Abadla) in July 2022. Several months later Mohamed Ali Loud bought a total of 1700 g from a meteorite dealer in Mauritania.
Petrography (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments and lithic clasts up to ~5 mm in size. These components are embedded in a fine-grained clastic matrix of related debris. Lithic clasts are dominated by eucritic gabbros and granulites, both of which show exsolved pyroxene. Mineral fragments include various eucritic pyroxenes (with and without augite exsolution lamellae), diogenitic pyroxene, feldspar, a silica polymorph, chromite, ilmenite, and Fe-Ni metal. About 10-20 vol% diogenitic components.
Geochemistry: Mineral compositions and geochemistry: Gabbro clast: Low-Ca pyroxene (host): Fs60.6±0.5 Wo3.1±0.2 (Fs59.9-61.2 Wo2.8-3.3); mean Fe/Mn (at.): 30.3; n=6. Ca-rich pyroxene (exsolution lamellae) Fs28.8±1.4 Wo40.9±1.5 (Fs27.4-30.5 Wo38.8-42.6); mean Fe/Mn (at.): 31.5; n=6. Plagioclase: An86.8±1.8 Or0.3±0.3 (An85.4-89.4 Or0.0-0.8); n=6. Diogenitic pyroxene: Fs22.5±0.5 Wo2.0±0.3 (Fs21.5-23.2 Wo1.5-2.4); mean Fe/Mn (at.): 32.6; n=7. Plagioclase fragments from clastic matrix: An89.6±3.6 Or0.5±0.4 (An82.5-95.7 Or0.1-1.1); n=11.
Classification: Howardite, based on mineral chemistry, variety of eucritic lithologies, and occurrence of >10 vol% of diogenitic components.
I am a member of the Meteoritical Society (#7743) and have collecting meteorites for more than 15 years.
详细资料
陨石类型
Bechar 008 - High Quality Achondrite Specimen (low weathering)
补充物
Certificate of authenticity
重量
32,5 g
国家
阿尔及利亚
