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| Northwest Africa 12770 | |||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12770 This is an OFFICIAL meteorite name. Abbreviation: NWA 12770 Observed fall: No Year found: 2019 Country: Morocco Mass:  1121 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 351 approved meteorites classified as Iron, IIIAB. [show all] Search for other: IIIAB irons, Iron meteorites, and Metal-rich meteorites | ||||||||||||||||||||||||
| Comments: | Approved 26 Sep 2019 | ||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Northwest Africa 12770 (NWA 12770) Morocco Purchased: January 2019 Classification: Iron meteorite (IIIAB) History: Six stones ranging from 53 g to 327 g, purchased from a dealer in Essaouria in January 2019. Physical characteristics: The six stones range in size from ~3 to 10 cm in longest dimension, and consist of a suite of irregularly shaoed masses with mottled brown and rusty red exterior surfaces. Petrography: (C. Herd, L. Tunney, and R. Bukatiuk, UAb) A 2 × 3 cm polished and etched slice shows a well-developed Widmanstatten pattern with average kamacite bandwidth of 0.9 ± 0.3 mm (n=11). No inclusions were observed. Geochemistry: (C. Herd and L. Tunney, UAb) ICP-MS data, using sample of North Chile (Filomena) as standard: Ni = 7.3, Co = 0.47 (both wt%); Ir = 12.2, Ga = 16.7, Ge = 27.2, As = 3.8, W = 1.0, Re = 1.2, Os = 2.6, Pt = 15.5, Cu = 169, Au <1.0 (all µg/g). Classification: Iron, IIIAB, medium octahedrite Specimens: Type specimen of 26.2 g at UAb. Main mass with Kuntz. | ||||||||||||||||||||||||
| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011) Kuntz: Fabien Kuntz, France; Website (private address) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography:
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Statistics: This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||