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Northwest Africa 12928 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12928 This is an OFFICIAL meteorite name. Abbreviation: NWA 12928 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 1530 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 279 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 21 Nov 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12928 (NWA 12928) (Northwest Africa) Purchased: 2016 Classification: HED achondrite (Eucrite, monomict) History: Purchased Nov 2016 by Dustin Dickens in Mauritania from anonymous dealer. Physical characteristics: Single stone, fusion crusted exterior, saw cut reveals a fragmental breccia of lithic clasts set in a light colored, fine-grained groundmass. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 60% pyroxene and 35% plagioclase. Many pyroxenes have exsolution lamellae. Minor silica and troilite observed. Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs53.4±4.6Wo2.5±1.1, Fe/Mn=33±1, n=10; high-Ca pyroxene Fs37.6±17.0Wo28.8±21.7, Fe/Mn=31±2, n=2; plagioclase An80.5±12.3, n=6. Classification: Monomict basaltic eucrite, equilibrated. Specimens: 20.9 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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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 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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