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Northwest Africa 15797 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15797 This is an OFFICIAL meteorite name. Abbreviation: NWA 15797 Observed fall: No Year found: 2023 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 97 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 4 Mar 2023 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 112:
Northwest Africa 15797 (NWA 15797) (Northwest Africa) Purchased: Jan 2023 Classification: HED achondrite (Eucrite, melt breccia) History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in January, 2023. Physical characteristics: Dark brownish rock with minor fusion crust. Petrography: Achondritic melt breccia composed of up to 7 mm sized rounded to subrounded basaltic clasts set in abundant recrystallized shock melt. Predominant minerals are up to 1 mm sized exsolved pyroxenes and calcic plagioclase. Mineral grains entrained in the melt matrix often show resorption textures. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron detected. Geochemistry: low-Ca pyroxene: Fs64.1±0.4Wo2.2±0.1 (Fs63.5-64.8Wo2.1-2.3, FeO/MnO=27-30, n=10); augite exsolution lamellae: Fs25.2±0.2Wo44.1±0.3 (Fs24.8-25.4Wo43.6-44.5, FeO/MnO=27-30, n=10); calcic plagioclase: An89.3±1.4 (An86.4-91.5, n=10) | ||||||||||||||||||||||||||||
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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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |