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Northwest Africa 12787 | |||||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12787 This is an OFFICIAL meteorite name. Abbreviation: NWA 12787 Observed fall: No Year found: 2019 Country: Morocco Mass: 196 g | ||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 709 approved meteorites (plus 2 unapproved names) classified as H3. [show all] Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||||
Comments: | Approved 21 Dec 2020 | ||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 12787 (NWA 12787) Morocco Purchased: 2019 Classification: Ordinary chondrite (H3) History: (Ziyao Wang) Purchased by Wei Jiang from Sbai Mohamed at the mineral show in Beijing in Nov. 2018 Physical characteristics: (Ziyao Wang) 196 g brown stone with spherical appearance. Weathering is very significant, the appearance is broken, without fusion crust Petrography: (R. Bartoschewitz, Bart) well-defined chondrules (0.1-1.5 mm, av. 0.5 mm) of various types (PO, PP, RP) and mineral fragments in a brown stained matrix, metal and sulfides are nearly complete oxidized. Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa16.3±4.9 (n=25); pyroxene Fs18.8±5.0Wo0.9±0.8 (n=13); chromite CRAL91, FFM98. Kamacite Ni=4.6-6.1, Co=0.8 (n=3); taenite Ni=18.5, Co=0.5 (n=1) (all wt%). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 5.06 Classification: Ordinary chondrite (H3, S2, W5) Specimens: 22.3 g at Kiel on deposit, Wei Jiang holds the main mass, Ziyao Wang 18 g, and 65 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) Beijing: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011) |
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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 2068 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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