|
Northwest Africa 12000 | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 12000 This is an OFFICIAL meteorite name. Abbreviation: NWA 12000 Observed fall: No Year found: 2017 Country: Morocco Mass: 225 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 148 approved meteorites classified as Iron, IIAB. [show all] Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites | ||||||||||||||||||||||||
Comments: | Approved 20 Oct 2018 | ||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12000 (NWA 12000) Morocco Purchased: May 2017 Classification: Iron meteorite (IIAB) History: Purchased by Zhang Qingyan in May 2017 from a Moroccan dealer during the China (Hunan) Mineral & Gem Show in Chenzhou City Physical characteristics: The main mass is approximately 2 × 5 × 10 cm with a dark brown, regmaglypted exterior. Some rust-red spots and adhered caliche are visible. Petrography: (C. Herd) A 1 × 2 cm polished and etched slice shows an equant texture of kamacite crystals at least as wide as the slice (1 cm) with interstitial schreibersite. The cm-scale kamacite is replaced by sub-500 μm equant crystals. Neumann lines are present. Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 5.7, Co = 0.49 (both wt%); Cu = 123, Ga = 55, As = 9.5, Ru = 3.4, W = 0.7, Ir = 0.03, Pd = 2.5, Pt = 4.5, Au = 1.1 (all μg/g). Classification: Iron, IIAB. Recrystallized texture. Specimens: Type specimen of 24.3 g at UAb. Zhang Qingyan 103 g, Liang Chengguang 28 g, M. Ouzillou 69.3 g. | ||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
|
||||||||||||||||||||||||
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) |
||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
| ||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 2049 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|