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Northwest Africa 12505 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12505 This is an OFFICIAL meteorite name. Abbreviation: NWA 12505 Observed fall: No Year found: 2017 Country: Mauritania Mass: 81 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 74 approved meteorites classified as R3. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 31 May 2020 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 12505 (NWA 12505) Mauritania Purchased: 2017 Classification: Rumuruti chondrite (R3) History: (Ziyao Wang) Purchased by Ziyao Wang from Aziz Habibi in Erfoud, Morocco 2017. Physical characteristics: (Ziyao Wang) Dark brown stone of 81 g with visible chondrules its smooth, wind-eroded surface. Petrography: (R. Bartoschewitz, Bart) Well-developed chondrules (0.1-1 mm, av. 0.3 mm) and rare CAIs set in a dark-gray matrix (~40 vol%). Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa37.5±10.6 (Fa8.2-49.2; n=47); pyroxene Fs14.2±10.6Wo0.1.8±4.0 (n=14); Ca pyroxene En40-61Fs17-27Wo12-44 (n=2); Cr-spinel CRAL=73-86, FFM=92-95, 1.8-4.2 wt% TiO2 (n=3). Pentlandite: Ni=29, Co=1 (n=3); pyrrhotite Ni?0.3, Co=0.1 (n=2); smythite Ni=28, Co=1.5 (n=1) (all wt-%). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 3.52 Classification: R3 Specimens: 16.3 g on deposit at Kiel, Ziyao Wang holds the main mass, and 14 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 217 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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