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Northwest Africa 15418 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15418 This is an OFFICIAL meteorite name. Abbreviation: NWA 15418 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: 1376 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 34 approved meteorites classified as R3-6. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 11 Dec 2022 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 15418 (NWA 15418) (Northwest Africa) Purchased: 2022 Classification: Rumuruti chondrite (R3-6) History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Brownish rock without fusion crust. Petrography: The meteorite is a breccia composed of up to 3 cm sized light brownish coloured mostly angular type 6 and few black impact melt clasts set in type 3 matrix with abundant chondrules. Type 6 clasts are dominated by Fe-rich olivine, diopside, and sodic plagioclase, type 3 clasts contain well defined mostly rounded chondrules with an average diameter of about 400 μm. Olivine and low-Ca pyroxene are compositionally unequilibrated. Opaques phases include pentlandite, troilite, and Ti-bearing chromite; no metal detected. Geochemistry: type 3 lithology: olivine: Fa25.5±14.3 (Fa3.6-39.8, n=12); low-Ca pyroxene: Fs18.9±7.8Wo0.8±0.6 (Fs8.9-29.6Wo0.3-2.2, n=10); type 6 lithology: olivine: Fa39.0±0.5 (FeO/MnO=83±6, n=7); Ca-pyroxene: Fs8.8±0.7Wo46.3±0.3, n=7; feldspar: An10.2-14.4Ab84.0-87.9Or1.6-2.4, n=7 Classification: Rumuruti 3-6 breccia; likely paired with NWA 14862. | ||||||||||||||||||||||||||||||
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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Crosslinks: |
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Revision history: |
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