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Northwest Africa 7683 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7683 This is an OFFICIAL meteorite name. Abbreviation: NWA 7683 Observed fall: No Year found: 2012 Country: Morocco Mass: 609 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 62 approved meteorites classified as L3.6. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||
Comments: | Approved 26 Feb 2013 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7683 (NWA 7683) Morocco Purchased: 2012 Classification: Ordinary chondrite (L3.6) History: Purchased by Adam Bates from a meteorite dealer in Morocco, August 2012. Physical characteristics: Single stone, dark brown weathered exterior, saw-cut reveals many densely packed chondrules of variable size, one up to 7 mm, fine-grained metal/sulfide. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, most in the range ~200-1500 μm, ubiquitous troilite, kamacite, taenite, and Fe-oxide. Geochemistry: (C. Agee and L. Burkemper, UNM) Olivine Fa23.1±6.7, Fe/Mn=59±18, Cr2O3=0.05±0.04 wt%, n=34; low-Ca pyroxene Fs15.1±8.8Wo1.8±2.6, Fe/Mn=38±35, n=32. Classification: Ordinary chondrite (L3.6), mean Fa-content and sigma consistent with type 3.6, low-Ca pyroxene has anomalously high sigma for type 3.6, weathering grade W2. Specimens: 25 g including a probe mount on deposit at UNM, Adam Bates 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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