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Northwest Africa 12587 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12587 This is an OFFICIAL meteorite name. Abbreviation: NWA 12587 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 261 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 11 May 2019 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12587 (NWA 12587) (Northwest Africa) Purchased: 2014 Classification: HED achondrite (Eucrite, monomict) History: Purchased in Denver, September 2014. Reportedly found in northwest Africa. Physical characteristics: Single mass; saw-cut reveals a mosaic of green pyroxene and white plagioclase grains crosscut by dark-gray shock melt veins. Petrography: (C. Agee, UNM) This meteorite consists of approximately 50% pyroxene, 30% plagioclase and 20% shock melt. There is a single basaltic eucrite lithology present. The pyroxene is highly equilibrated with a distinct compositional separation between low- and high-Ca pyroxene. Geochemistry: (C. Agee, UNM) low-Ca pyroxene Fs59.5±1.3Wo3.3±1.5, Fe/Mn=32±1, n=12; high-Ca pyroxene Fs26.8±0.9Wo43.1±1.0, Fe/Mn=32±1, n=9; plagioclase An89.4±2.2, n=7. Classification: Monomict eucrite Specimens: 20.11 g on deposit at UNM, MMGM 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) MMGM: Maine Mineral and Gem Museum, PO Box 500, 99 Main St., Bethel, ME 04217, United States; Website (institutional address; updated 9 Jan 2020) |
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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 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names) |