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| Northwest Africa 11112 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 11112 This is an OFFICIAL meteorite name. Abbreviation: NWA 11112 Observed fall: No Year found: 2016 Country: Morocco Mass:  528 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 151 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 9 Apr 2018 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 107:
Northwest Africa 11112 (NWA 11112) Morocco Find: 2016 Classification: Ungrouped achondrite History: Purchased by Ke Zuokai in Dec. 2016 from a Moroccan dealer. Physical characteristics: The meteorite has a black fusion crust and partially covered by weathering products. Petrography: A polished mount shows a medium-grained rock (mostly 0.1-1 mm) with granular texture. It is composed of ~47% olivine and ~42% pyroxene with intersertally ~4% plagioclase and 7% opaque minerals (FeNi metal, sulfide and chromite). No relic chondrules. Not brecciated. Geochemistry: The compositions of olivine, pyroxene and plagioclase are quite uniform. Olivine Fa36.4-38.5, Fe/Mn=80.2-108.1; orthopyroxene Fs29.1-30.0Wo2.8-3.2, Fe/Mn=51.2-63.6; plagioclase An52.3-55.7Ab43.0-46.5Or1.1-1.3; chromite TiO2 1.51-1.80, Al2O3 13.71-14.05, MgO 3.01-3.72 (all in wt%); taenite Ni 16.09-21.16 wt%; kamacite Ni 6.58-6.93 wt%. Classification: Achondrite (ungrouped). No relic chondrules are found in this thin section, and the compositions of plagioclase (~An52.3) are significantly different from those of chondrites. In this regard, we consider NWA 11112 is not an equilibrated chondrite. The petrography and mineral compositions (olivine, pyroxene, plagioclase, chromite and Fe-Ni metal) in this meteorite are very similar to those of the ungrouped achondrite NWA 3250. | ||||||||||||||||||||||||||||||
| Data from: MB107 Table 0 Line 0: |
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| Institutions and collections |
PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011) |
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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:
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Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
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| Also see: |
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| Revision history: |
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