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Northwest Africa 8555 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8555 This is an OFFICIAL meteorite name. Abbreviation: NWA 8555 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass: 2.92 kg | ||||||||||||||||||||||
Classification history: |
This is 1 of 280 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||
Comments: | Approved 18 Oct 2014 | ||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 8555 (NWA 8555) (Northwest Africa) Purchased: 2013 Classification: HED achondrite (Eucrite, monomict) History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, April, 2013. Physical characteristics: Two matching stones, 1729 g and 1198 g. Irregular weathered exterior. Saw cut reveals a breccia with tan lithic clasts up to 1 cm set in a dark-gray matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount show basaltic eucrite clasts cross-cut by shock melt veins, pyroxenes show exsolution lamellae. Ubiquitous chromite, ilmenite, and silica, some barite found. Moderate weathering. Geochemistry: (C. Agee and N. Muttik, UNM) Low-Ca pyroxene Fs60.7±2.2Wo4.5±2.4, Fe/Mn=33±1, n=12; high-Ca pyroxene Fs29.3±1.5Wo41.1±1.6, Fe/Mn=33±1, n=12; plagioclase An89.0±1.2, n=8. Classification: Achondrite (monomict eucrite) Specimens: 59.78 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. | ||||||||||||||||||||||
Data from: MB103 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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Photos: |
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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