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Northwest Africa 7678 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7678 This is an OFFICIAL meteorite name. Abbreviation: NWA 7678 Observed fall: No Year found: 2012 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 619 approved meteorites (plus 1 unapproved name) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||
Comments: | Approved 1 Mar 2013 | ||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 7678 (NWA 7678) Morocco Purchased: 2012 Aug Classification: Carbonaceous chondrite (CV3) History: Purchased by Adam Bates from a meteorite dealer in Morocco, August 2012. Physical characteristics: 182 matching individuals/fragments, main mass 581 g. Dark weathered exterior, saw-cut reveals many small chondrules less than 1 mm and a few up to 5 mm, scattered CAIs up to 1 cm, set in a dark gray groundmass. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a numerous AOA, BO, PO, POP, and PP chondrules, most in the size range 300-1000 μm, in very fine-grained matrix. Abundant troilite; nearly all iron metal is oxidized by weathering. Geochemistry: (C. Agee and M. Spilde, UNM) Chondrule olivine range: Fa0.7-63.1, n=31. Type I chondrules: olivine Fa 3.0±1.9, Fe/Mn=49±31, Cr2O3=0.14±0.09, n=26; low-Ca pyroxene Fs2.0±1.6Wo1.3±0.9, Fe/Mn=25±20, n=23. Type II chondrules: olivine Fa 40.3±26.4, Fe/Mn=133±53, Cr2O3=0.08±0.04, n=5. Fassaite Fs5.1±0.6Wo58.4±1.2, Al2O3=23.69±0.14 wt%, Na2O=2.65±0.00 wt%, n=2. Classification: Carbonaceous chondrite (CV3) Specimens: 65 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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Photos: |
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Geography:![]() |
Statistics: This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) |