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Northwest Africa 11559 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11559 This is an OFFICIAL meteorite name. Abbreviation: NWA 11559 Observed fall: No Year found: 2017 Country: Algeria Mass: 33.9 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 651 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 12 Jan 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11559 (NWA 11559) Algeria Purchased: 2017 Jun Classification: Carbonaceous chondrite (CO3) History: Purportedly found near the Algeria/Libya border and purchased by Darryl Pitt in June 2017 from a dealer in Mauritania. Petrography: (A. Irving and S. Kuehner, UWS) Small, well-formed chondrules (apparent diameter 420 ± 190 µm, N = 20) accompanied by sparse angular mineral grains are set in a finer grained matrix (~40 vol.%, brown in thin section) containing accessory chromite, altered kamacite and pyrrhotite. No CAI were observed. Geochemistry: Olivine (Fa0.9-41.4, Cr2O3 in ferroan examples <0.02 wt.%, N = 8), orthopyroxene (Fs12.6-23.8Wo2.1-0.6, N = 3), clinopyroxene (Fs9.1-10.9Wo46.8-45.9, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.02. Classification: Carbonaceous chondrite (CO3). The below detection limit Cr2O3 contents in ferroan olivines indicate a petrologic subtype >3.6. Specimens: 9.5 g including one polished thin section at UWB; remainder with DPitt. | ||||||||||||||||||||||||||||||
Data from: MB107 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. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 1336 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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