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Northwest Africa 7781 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7781 This is an OFFICIAL meteorite name. Abbreviation: NWA 7781 Observed fall: No Year found: 2012 Country: Morocco Mass: 647 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2060 approved meteorites (plus 5 unapproved names) classified as L4. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||
Comments: | Approved 3 Apr 2013 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7781 (NWA 7781) Morocco Purchased: 2012 Classification: Ordinary chondrite (L4) History: Purchased by Sean Tutorow from a Moroccan meteorite dealer in 2012. Physical characteristics: Single stone, brown exterior, saw cut reveals small metal grains set in light-brown matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a few PO, POP chondrules, some coarse-grained olivines in shock-melt, plagioclase up to 100 μm. Geochemistry: (C. Agee and L. Burkemper, UNM) Olivine Fa25.6±1.6, Fe/Mn=49±5, n=5; low-Ca pyroxene Fs21.6±1.7Wo1.5±0.2, Fe/Mn=31±1, n=4. Classification: Ordinary chondrite (L4), weathering grade W2. Specimens: 38.1 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB102 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. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 2068 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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