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Northwest Africa 15458 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15458 This is an OFFICIAL meteorite name. Abbreviation: NWA 15458 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 12 approved meteorites classified as R3-4. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 25 Dec 2022 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 111:
Northwest Africa 15458 (NWA 15458) (Northwest Africa) Purchased: 2022 Oct Classification: Rumuruti chondrite (R3-4) History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Brownish rock without fusion crust. Petrography: Chondritic breccia composed of up to 5 cm sized type 4 and dark up to 3 mm sized melt clasts set in type 3 matrix. Type 3 and 4 lithologies are composed of well outlined mostly rounded chondrules (apparent mean diameter about 450 μm) and mineral fragments set in abundant matrix dominated by Fe-rich olivine. Minor phases include Ca-pyroxene and sodic plagioclase. Opaques are troilite, pentlandite, and chromite; no metal has been detected. Geochemistry: type 3 lithology: olivine: Fa26.5±16.3 (Fa1.0-44.2, n=22); low-Ca pyroxene: Fs15.8±12.6Wo0.8±0.3 (Fs2.7-30.0Wo0.3-1.1, n=10); ; type 4 lithology: olivine: Fa37.6±0.4 (Fa37.1-38.5, FeO/MnO=78±4, n=10); low-Ca pyroxene: Fs20.4±7.1Wo0.7±0.9 (Fs13.9-29.2Wo0.1-3.1, n=10); Ca-pyroxene: Fs9.3±0.4Wo45.5±1.0 (Fs8.8-10.4Wo43.0-47.0, n=10) | ||||||||||||||||||||||||||||||
Data from: MB111 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) Polandmet: targoniny 30 43445 Dziegielow Poland, Poland; Website (institutional address; updated 7 May 2021) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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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) |