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Northwest Africa 13628 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13628 This is an OFFICIAL meteorite name. Abbreviation: NWA 13628 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 595 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 12 Dec 2020 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 109:
Northwest Africa 13628 (NWA 13628) (Northwest Africa) Purchased: 2020 Oct Classification: HED achondrite (Eucrite) History: The meteorite was found by Mr. Muhamad Salm and subsequently purchased by the main mass holder from a dealer in Adrar, Algeria. Physical characteristics: Dark-grayish fragment without fusion crust. Petrography: Predominantly composed of up 3 mm sized exsolved pyroxene and calcic plagioclase fragments cemented by abundant shock melt. Shock melt is partly recrystallized with lath-shaped plagioclase needles; embedded mineral fragment are partially resorbed. Minor phases are silica, chromite, and FeS; no metallic iron has been detected. The meteorite contains secondary barite and calcite-filled cracks. Geochemistry: low-Ca pyroxene: Fs33.9±0.3Wo2.2±0.1 (Fs33.5-34.6Wo2.0-2.3, n=11, FeO/MnO=25-28); Ca-pyroxene: Fs12.6±0.8Wo44.9±0.9 (Fs10.8-13.8Wo44.0-47.0, n=13, FeO/MnO=18-21); calcic plagioclase: An92.9±0.9 (An91.7-93.9, n=5) | ||||||||||||||||||||||||||||||
Data from: MB109 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. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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