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Northwest Africa 7491 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7491 This is an OFFICIAL meteorite name. Abbreviation: NWA 7491 Observed fall: No Year found: 2012 Country: Morocco Mass: 306 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||
Comments: | Approved 18 Oct 2012 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 101:
Northwest Africa 7491 (NWA 7491) Morocco Purchased: May 2012 Classification: Ordinary chondrite (L6) History: Purchased by Sean Tutorow in Morocco, May 2012. Physical characteristics: Two matching fragments, with shiny, smooth fusion crust, saw cut reveals finely disseminated metal/sulfide and many chondrules, some up to 4mm, set in a light gray matrix. Some fine weathering veins. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous equilibrated, recrystallized chondrules. Ubiquitous troilite and kamacite with moderate oxidation, accessory Cl-rich apatite and merrillite. Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa24.7±0.1, Fe/Mn=49±2, n=3; low-Ca pyroxene Fs20.7±0.2Wo1.5±0.3, Fe/Mn=28±1, n=3. Classification: Ordinary chondrite (L6), weathering grade W2. Specimens: 20.12 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB101 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. 101, MAPS 50, 1661, September 2015
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Geography: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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