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Northwest Africa 15285 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15285 This is an OFFICIAL meteorite name. Abbreviation: NWA 15285 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 9 approved meteorites classified as LL4/5. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 14 Sep 2022 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 111:
Northwest Africa 15285 (NWA 15285) (Northwest Africa) Purchased: January 2021 Classification: Ordinary chondrite (LL4/5) History: A single stone of 8.333 kg was purchased from Topher Spinnato by Pat Brown at Quartzite Arizona in January of 2021. Physical characteristics: Stone contains a dark-brown, weathered fusion crust. Petrography: (D. Sheikh, Cascadia; P. Brown, MeteoriticsLab) Sample is an ordinary chondrite containing well-defined chondrules (Av. 1320±50 μm) set within a fine-grained matrix containing accessory Fe-Ni metal and troilite. Geochemistry: Olivine (Fa27.2±0.1, range Fa26.9-27.5, n=19), Low-Ca Pyroxene (Fs22.3±0.2Wo1.9±0.1, range Fs22.1-22.8Wo1.6-2.0, n=16). Classification: Ordinary Chondrite (LL4/5). Many well rounded chondrules containing devitrified glass are preserved, yet their olivine and pyroxene compositions are completely equilibrated across the entire sample. This suggests a transitional classification of LL4/5. Specimens: 104 g at Cascadia, main mass with Pat Brown. | ||||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
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Institutions and collections |
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |