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Northwest Africa 15320 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15320 This is an OFFICIAL meteorite name. Abbreviation: NWA 15320 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: 78 kg | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 6484 approved meteorites (plus 2 unapproved names) classified as H4. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
Comments: | Approved 1 Oct 2022 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 15320 (NWA 15320) (Northwest Africa) Purchased: 2022 Jan Classification: Ordinary chondrite (H4) History: Purchased by Wenxi Jin and Ziyao Wang in January 2022 from a dealer in Agadir, Morocco. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Relatively small, well-formed equilibrated chondrules are set in a fine-grained opaque matrix containing relatively Ni-rich kamacite, troilite and pentlandite. The chondrules in this specimen appear to be very fresh and unstained, whereas metal in the matrix has been partially to wholly altered to Fe oxides. Geochemistry: Olivine (Fa20.5±0.2, range Fa20.2-20.6, N = 5), low-Ca pyroxene (Fs17.6±0.2Wo1.4±0.6, range Fs17.3-17.8Wo0.8-2.0, N = 4), subcalcic augite (Fs11.6Wo26.3; Fs10.0±0.9Wo34.1±0.9, range Fs9.6-10.3Wo34.7-33.4; N = 3), augite (Fs7.0Wo42.1), plagioclase (Ab67.1An32.0Or0.9). Magnetic susceptibility log χ (× 10-9 m3/kg) = 5.17. Classification: Ordinary chondrite (H4). Mafic silicate compositions in this large specimen are at the high end of the range for H chondrites. Specimens: 20.6 g including one polished thin section at UWB; remainder with Wenxi Jin and WangZ. | ||||||||||||||||||||||||||||||||
Data from: MB111 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) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021) |
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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 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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