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Northwest Africa 15296 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15296 This is an OFFICIAL meteorite name. Abbreviation: NWA 15296 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 50 approved meteorites classified as L-melt rock. [show all] Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 23 Feb 2023 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 112:
Northwest Africa 15296 (NWA 15296) (Northwest Africa) Purchased: 2022 Classification: Ordinary chondrite (L, melt rock) History: The meteorite was reportedly found 2021 in Mali and subsequently purchased from a meteorite dealer in Algeria. Physical characteristics: Many dark brownish fragments without fusion crust. Petrography: The igneous rock displays a granular texture of predominantly 30-200 µm sized partly euhedral olivine and pyroxene grains together with interstitial Si,Al-rich mesostasis. Olivine shows weak and pyroxene strong compositonal zoning. Pyroxene are often overgrown by thin augite margins. Opaque phases are chromite, sulfides, and rare FeNi metal typically occurring as blebs in the mesostasis. Neither feldspar nor relict chondrules detected. The meteorite contains shock melt veins and pockets. Geochemistry: olivine: Fa25.3±1.2 (Fa23.8-28.3, FeO/MnO=47±3, n=10); pyroxene: Fs16.3±2.2Wo15.0±13.1 (Fs12.7-18.8Wo2.2-34.8, FeO/MnO=24±3, n=15); mesostasis (wt%): SiO2: 68.5±1.4, Al2O3: 19.5±0.5, Na2O: 3.77±0.32, K2O: 0.65±0.04, CaO: 2.22±0.12, MgO: 0.54±0.10, FeO: 1.32±0.29, TiO2: 0.09±0.03, N=7 Classification: L-melt rock. The silicate composition do not exactly fit the range for equilibrated L chondrites, but this is often the case with chondritic melt rocks, and L is the closest match. | ||||||||||||||||||||||||||||||
Data from: MB112 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Photos: |
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |