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Northwest Africa 11754 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11754 This is an OFFICIAL meteorite name. Abbreviation: NWA 11754 Observed fall: No Year found: 2017 Country: Morocco Mass: 304 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 11754 (NWA 11754) Morocco Purchased: 2017 Jul Classification: Ureilite Petrography: (K. Metzler, IfP) Coarse-grained ultramafic rock with metamorphic texture (~120° triple junctions), consisting of olivine, low-Ca pyroxene, and Ca-pyroxene grains with sizes up to ~3 mm. Reverse zoning of olivine with Mg-rich zones at the margins and along cracks can be observed. Metal is concentrated along grain boundaries and cracks and mostly oxidized by terrestrial weathering. Geochemistry: Mineral compositions and geochemistry: Olivine cores (n=4): Fa11.4±0.7; Olivine rims (n=3): Fa6.6±0.3. Low-Ca pyroxene grains (n=9): Fs10.7±0.2Wo4.9±0.2. Ca-pyroxene grains (n=12): Fs6.6±0.2Wo36.2.±0.2. The concentration of Cr2O3 in olivine and pyroxene is 0.5 wt% and 1.1 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) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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