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Northwest Africa 8721 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8721 This is an OFFICIAL meteorite name. Abbreviation: NWA 8721 Observed fall: No Year found: 2014 Country: Morocco Mass: 152.1 g | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 217 approved meteorites classified as CK5. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||
Comments: | Approved 2 Feb 2015 | ||||||||||||||||||||||||||
Writeup |
Writeup from MB 104:
Northwest Africa 8721 (NWA 8721) Morocco Purchased: Oct 2014 Classification: Carbonaceous chondrite (CK5) History: Purchased from a dealer in Morocco in October of 2014 by A. Jonikas. Physical characteristics: One stone fragment with black fusion crust on one side. Cut surface reveals scattered chondrules within a grayish-brown matrix. Petrography: (A. Rubin and J. Breen, UCLA) Microprobe examination of a polished mount shows plagioclase grains average 20 μm in size. The groundmass grain size is 70 μm, consistent with CK5. There are readily discernable chondrules and small rounded magnetite grains. Geochemistry: Mineral compositions and geochemistry: olivine: Fa32.5±0.3 (n=18); there is no low-Ca pyroxene; Ca-pyroxene: Fs10.2±2.3Wo48.0±0.6 (n=5) Classification: Carbonaceous Chondrite (CK5), Wi4 based on weathering index as published in Rubin and Huber (2005). Specimens: 22.07 g on deposit at UCLA, A. Jonikas hold the main mass. | ||||||||||||||||||||||||||
Bibliography: |
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Data from: MB104 Table 0 Line 0: |
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Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Photos: |
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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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