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Northwest Africa 11757 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11757 This is an OFFICIAL meteorite name. Abbreviation: NWA 11757 Observed fall: No Year found: 2017 Country: Morocco Mass: 1600 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 660 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||
Comments: | Approved 26 May 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11757 (NWA 11757) Morocco Purchased: 2017 Sep Classification: Ureilite Petrography: (K. Metzler, IfP) Coarse-grained ultramafic rock with metamorphic texture (~120° triple junctions), consisting of olivine and pyroxene grains up to ~2 mm. Reverse zoning of olivine grains with Mg-rich zones at the margins and along cracks. Metal is concentrated along grain boundaries and partly oxidized by terrestrial weathering. Geochemistry: Mineral compositions and geochemistry: Olivine cores (n=10): Fa21.0±0.6; Olivine rims (n=5): Fa1.4±0.1. Pyroxene grains (n=10): Fs18.0±0.3Wo7.2±0.2. The concentration of Cr2O3 in olivine and pyroxene is 0.5 wt% and 0.8 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 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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