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| Christiana | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Christiana This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2004 Country: South Africa Mass:  127.9 kg | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 83 approved meteorites (plus 1 unapproved name) classified as Iron, IVA. [show all] Search for other: Iron meteorites, IVA irons, and Metal-rich meteorites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 17 Dec 2016 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 105:
Christiana 27°54’S, 25°9’E North West, South Africa Find: 2004 Classification: Iron meteorite (IVA) History: Found by a farm laborer out hunting in farm fields around 2004. It was then acquired by a gem and mineral dealer in Capetown, and subsequently sold at the Tucson Rock and Mineral Show circa 2005. Physical characteristics: The main mass weighs approximately 128 kg and is irregular in shape with a glossy brown to red-brown exterior. Numerous regmaglypts are present, including some that are spherical and several cm across. Petrography: Optical investigation reveals a well-developed Widmanstatten pattern consistent with a finest octahedrite. Troilite and schreibersite inclusions are common. Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 8.2, Co = 0.39 (both wt%); Ir = 2.6, Ga = 2.5, W = 0.65, Re = 0.29, Cu = 170, Ru = 4.2, Pd = 2.8, Pt = 6.1 (all μg/g). Classification: (C. Herd, UAb): IVA iron, finest octahedrite. Specimens: Type specimen of 139.8 g at UAb. Main mass at JTESM. Writeup from MB 108: Christiana: correction.
In 2018 it was discovered that the type specimen provided for the purposes of classification was instead a slice of the Gibeon meteorite. A sample of the correct meteorite was provided and analyzed at UAb, giving the following results: Petrography: SEM investigation of a ~1.5 x 8 cm x 0.7 cm polished and etched sample reveals a plessitic pattern (kamacite bandwidth = 33±6 μm, n=32). No inclusions were observed. Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen, UAb): Ni = 8.1, Co = 0.40 (both wt%); Ir = 2.6, Ga = 2.15, As = 4.3, W = 0.85, Re = 0.28, Cu = 149, Ru = 5.2, Pd = 3.3, Pt = 7.4, Au = 1.4 (all μg/g). Classification: (C. Herd, UAb): IVA iron, plessitic. Specimens: Type specimen of 61.5 g at UAb. Main mass at JTESM. | ||||||||||||||||||||||||||||||||
| Data from: MB105 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) JTESM: Joshua Tree Earth And Space Museum PO BOX 101, Lakeville, IN 46536, United States (institutional address; updated 17 Dec 2016) |
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| References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full 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 3 approved meteorites from North West, South Africa (plus 1 unapproved name) (plus 2 impact craters) This is 1 of 47 approved meteorites from South Africa (plus 2 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||
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