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Northwest Africa 13771 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13771 This is an OFFICIAL meteorite name. Abbreviation: NWA 13771 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 121.4 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 104 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 13 Mar 2021 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 13771 (NWA 13771) (Northwest Africa) Purchased: 2020 Classification: HED achondrite (Eucrite, melt breccia) History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in late 2020. Physical characteristics: Two dark grayish fragments without fusion crust. Petrography: Eucrite-melt breccia composed of up to 1.7 mm sized mineral fragments set into abundant shock melted matrix. Predominant minerals are exsolved pyroxenes and calcic plagioclase. The fine-grained shock melt is mostly recrystallized and mineral grains in contact with the melt are partly resorbed. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron has been detected. Contains secondary calcite and barite. Geochemistry: low-Ca pyroxene: Fs34.0±1.3Wo2.2±0.1 (Fs32.5-35.5Wo2.0-2.3, n=12, FeO/MnO=25-29); Ca-pyroxene: Fs13.0±0.4Wo44.4±0.7 (Fs12.5-13.8Wo43.1-45.2, n=10, FeO/MnO=18-25); calcic plagioclase: An93.9±0.5 (An93.1-94.6, n=12) Classification: Eucrite-melt breccia | ||||||||||||||||||||||||||||
Data from: MB110 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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