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Northwest Africa 8561 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8561 This is an OFFICIAL meteorite name. Abbreviation: NWA 8561 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass: 404 g | ||||||||||||||||||||||
Classification history: |
This is 1 of 7 approved meteorites classified as Mesosiderite-A1. [show all] Search for other: Class A mesosiderites, Mesosiderites, and Metal-rich meteorites | ||||||||||||||||||||||
Comments: | Approved 18 Oct 2014 | ||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 8561 (NWA 8561) (Northwest Africa) Purchased: 2013 Classification: Mesosiderite (group A1) History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, April, 2013. Physical characteristics: Single stone, weathered irregular exterior. Saw cut reveals a brown-colored, fine-grained breccia, oxidation present. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 50% oxidized iron, with some remnant metal (kamacite and taenite); zoned orthopyroxene makes up approximately 70% of the silicate portion, with plagioclase at ~25%, grain size up to 300 μm. Apatite, chromite, and silica present. Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa57.4±4.5, Fe/Mn=46±1, n=2; low-Ca pyroxene Fs40±1.0Wo4.7±3.4, Fe/Mn=30±3, n=15; plagioclase An87.7±2.7, n=6. Classification: Mesosiderite A1, high weathering grade. Specimens: 21.8 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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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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