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Northwest Africa 11469 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11469 This is an OFFICIAL meteorite name. Abbreviation: NWA 11469 Observed fall: No Year found: 2016 Country: Algeria Mass: 640 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 651 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 3 Nov 2017 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 106:
Northwest Africa 11469 (NWA 11469) Algeria Purchased: 2016 Aug Classification: Carbonaceous chondrite (CO3) History: Purchased from Abdeltif Mechaguen in August of 2016 in Mauritania. Reportedly found in Algeria in 2016. Physical characteristics: Many identical appearing fragments in the range 4-52 g. Weathered exterior; saw cuts reveal numerous small chondrules set in a brown groundmass. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows may porphyritic chondrules, most in the size range 50-300 μm. Fine grained matrix makes up ~40% of this meteorite. Geochemistry: (C. Agee and A. Santos, UNM) Olivine Fa24.1±16.7, Mn/Fe=97±32, Cr2O3=0.10±0.15 wt%, n=40; low Ca pyroxene Fs9.3±13.5Wo1.3±1.2, n=11; high Ca pyroxene Fs1.3±0.5Wo46.5±0.6, n=3. Classification: Carbonaceous chondrite (CO3), subtype >3.2 based on the Cr2O3 in olivine, Grossman and Brearley (2005). Specimens: 20 g on deposit at CSFK, Zsolt Kereszty holds the main mass. | ||||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB106 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) CSFK: Research Center for Astronomy and Earth Sciences, H-1121 Budapest, Konkoly Thege Miklós út 15-17.l Hungary, Hungary (institutional address; updated 7 Apr 2015) |
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Catalogs: |
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References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Photos: |
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Geography: |
Statistics: This is 1 of 1336 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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