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Northwest Africa 11673 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11673 This is an OFFICIAL meteorite name. Abbreviation: NWA 11673 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 212 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 237 approved meteorites classified as Eucrite-br. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 31 Mar 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 11673 (NWA 11673) (Northwest Africa) Purchased: 2017 Nov Classification: HED achondrite (Eucrite, brecciated) History: Purchased by Darryl Pitt in November 2017 from a Mauritanian dealer. Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of a variety of lithic clasts and related debris in a finer grained matrix. Eucrite clasts exhibit diverse textures (including subophitic, microgabbroic and gabbroic). Other minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, Ti-chromite, chromite and troilite. Except in one gabbroic eucrite clast in the studied thin section (where the plagioclase is birefringent with strongly undulose extinction), all of the plagioclase in this specimen has been transformed almost entirely to maskelynite (although very minor birefringent domains are present in places). Geochemistry: Orthopyroxene host (Fs56.6-58.7Wo3.0-2.5, FeO/MnO = 30-33, N = 3), clinopyroxene exsolution lamellae (Fs26.4-27.4Wo41.5-40.7, FeO/MnO = 33-35, N = 2), plagioclase (An88.5-92.2Or0.7-0.4, N = 4). Classification: Eucrite (genomict breccia, shocked). Specimens: 22.5 g including one polished thin section at UWB; main mass with DPitt. | ||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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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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