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Northwest Africa 11815 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11815 This is an OFFICIAL meteorite name. Abbreviation: NWA 11815 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 279 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 658 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||
Comments: | Approved 16 Jun 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11815 (NWA 11815) (Northwest Africa) Purchased: 2017 Dec Classification: Ureilite History: Purchased from an Algerian mineral dealer. Petrography: (K. Metzler, IfP) Coarse-grained ultramafic rock with aligned texture, consisting of olivine and pyroxene grains with sizes up to ~2.5 mm. Reverse zoning of olivine grains with Mg-rich zones at the margins and along cracks. Metal is concentrated along grain boundaries and mostly oxidized by terrestrial weathering. Geochemistry: Mineral compositions and geochemistry: Olivine cores (n=9): Fa18.3±0.2; Olivine rims (n=6): Fa3.6±1.1; Pyroxene grains (n=14): Fs15.3±0.3Wo8.1±0.3. The mean concentration of Cr2O3 in olivine and pyroxene is 0.7 wt% and 1.2 wt%, respectively. | ||||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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