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Northwest Africa 12780 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12780 This is an OFFICIAL meteorite name. Abbreviation: NWA 12780 Observed fall: No Year found: 2019 Country: Morocco Mass: 8.5 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 99 approved meteorites classified as LL7. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 23 May 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 12780 (NWA 12780) Morocco Purchased: 2019 Classification: Ordinary chondrite (LL7) History: (Ziyao Wang) Purchased by Ziyao Wang from Said Yousfi in Errachidia, Morocco, in Oct. 2019. Physical characteristics: (Ziyao Wang) brown stone 8.5 g, without fusion crust Petrography: (R. Bartoschewitz, Bart) highly recrystallized granular texture with grain sizes up to 0.6 mm (av. 0.1 mm), no relict chondrules, and abundant feldspar >100 μm. Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa31.1±0.4 (n=16); pyroxene Fs25.8±1.2Wo3.5±0.9 (n=3); Ca pyroxene En45-48Fs10-13Wo39-43 (n=3); feldspar An4-14Or3 (n=3); chromite CRAL87, FFM92 (n=3). Tetrataenite Co=2.2 wt% (n=3); troilite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 3.31. Classification: Ordinary chondrite (LL7), based on texture, Wo content of pyroxenes, plagioclase size, and absence of chondrules Specimens: 1.73 g at Kiel on deposit, Ziyao Wang holds the main mass and 1 g with Bart. | ||||||||||||||||||||||||||||||
Data from: MB109 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. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 2049 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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