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Northwest Africa 1871 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 1871 This is an OFFICIAL meteorite name. Abbreviation: NWA 1871 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 574 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 23 Jul 2022 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 1871 (NWA 1871) (Northwest Africa) Purchased: 2019 Classification: HED achondrite (Eucrite) History: The meteorite was exported from Morocco for purchase by N. Gessler. Physical characteristics: A subround single individual stone, 40% covered by matte black partially orange stained, coarsely crazed fusion crust. Cut and broken faces show a medium light gray N6 matrix with inclusions <15 mm. Petrography: The meteorite is intensely brecciated. The matrix appears nearly opaque in thin section, with typical grain size 0.02 mm. Scattered clasts are up to 6 mm, the largest being a brecciated basalt with granoblastic polygonalism evident in the pyroxene. Possibly paired with NWA 1861. Geochemistry: Pyroxene (12 analyses) ranges from Fs36.3Wo5.5 to Fs56.9Wo3.5 to Fs32.3Wo34.2, and averages Fs47.5Wo8.6, with FeO/MnO (wt ratio) = 31.9. Plagioclase (9 analyses) ranges from An82.1 to An 93.6 and averages An89.1. Classification: Eucrite, brecciated, probably polymict Specimens: Main mass with Gessler, type specimen, including multiple thin sections, at UCLA. | ||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
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Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016) |
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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) | ||||||||||||||||||||||||||||
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Revision history: |
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