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Northwest Africa 13220 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13220 This is an OFFICIAL meteorite name. Abbreviation: NWA 13220 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 630 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 708 approved meteorites (plus 2 unapproved names) classified as H3. [show all] Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 23 Feb 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13220 (NWA 13220) (Northwest Africa) Purchased: 2019 Oct Classification: Ordinary chondrite (H3) History: Purchased by Grant Harkness in October 2019 from a dealer in Zagora, Morocco. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Relatively small, unequilibrated glass-bearing chondrules (apparent diameter 370 ± 200 µm, N = 20) are set in a finer grained matrix containing abundant fresh metal, troilite, chromite, Cl-free apatite and chlorapatite. Geochemistry: Olivine (Fa18.7±3.5, range Fa14.0-27.6, N = 9; Cr2O3 in ferroan examples <0.06 wt.%, N = 5), low-Ca pyroxene (Fs15.9±0.4Wo0.9±0.7, range Fs15.5-16.4Wo0.3-1.8, N = 4; Fs5.1Wo0.4). Classification: Ordinary chondrite (H3). Likely paired with "HC8" and "HC11". Specimens: 44.5 g including one polished thin section at PSF; remainder in the Harkness Collection. | ||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) |
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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) | ||||||||||||||||||||||||||||||
Crosslinks: |
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Revision history: |
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