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Northwest Africa 7318 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7318 This is an OFFICIAL meteorite name. Abbreviation: NWA 7318 Observed fall: No Year found: 2012 Country: (Northwest Africa) Mass: 420 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 660 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||
Comments: | Approved 10 Apr 2017 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 106:
Northwest Africa 7318 (NWA 7318) Northwest Africa Purchased: 2012 Apr Classification: Ureilite History: Purchased in Temara, Morocco by Adam Aaronson in April 2012. Petrography: (A. Irving and S. Kuehner, UWS) Protogranular aggregate of olivine (~70 vol.%) and pigeonite (~30 vol.%), exhibiting some preferred orientation of grains of both phases. Fine grained metal occurs in irregular zones along olivine grain boundaries (and as blebs in their magnesian, reduced margins). Geochemistry: Olivine (cores Fa20.1-22.0; Cr2O3 = 0.71-0.74 wt.%; N = 3), pigeonite (Fs18.0-18.1Wo9.4-9.5, N = 2) Classification: Ureilite. Specimens: 20 g including one polished thin section at UWB. The remaining material is held by Aaronson. | ||||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
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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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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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