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| Northwest Africa 12791 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12791 This is an OFFICIAL meteorite name. Abbreviation: NWA 12791 Observed fall: No Year found: 2019 Country: Morocco Mass:  27 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 554 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 23 Jan 2021 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 12791 (NWA 12791) Morocco Purchased: 2019 Classification: HED achondrite (Eucrite) History: (Ziyao Wang) Purchased by Ziyao Wang from a Moroccan dealer in Yiwu/Zhejiang in Apr 2019 Physical characteristics: (Ziyao Wang) brown irregularly shaped stone of 27 g, without fusion crust Petrography: (R. Bartoschewitz, Bart) intergranular phenocrysts of pyroxene and feldspar. Pyroxene phenocrysts are of aphanitic texture (grain size ~20 µm) with few microcrysts (>30 µm), while feldspar phenocrysts present a micro trachytic texture. In our section this intergranular texture shows a transition to a turbid melt texture. Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Low Ca pyroxene Fs59.2±0.5Wo3.4±0.3, Fe/Mn=32 (n=2); pigeonite En35-45Fs49-57Wo5-10 (n=16); augite En30-33Fs27-52Wo18-42 (n=5); plagioclase An87-91Or<1 (n=11); chromite CRAL74-79, FFM4-9 (n=3); ilmenite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 2.60. Classification: Achondrite (basaltic eucrite) Specimens: 5.47 g on deposit at Kiel, Wang Ziyao holds the main mass, and 6 g with Bart. | ||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013) Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:
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Statistics: This is 1 of 1837 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||