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| Xinjiang (b) | |||||||||||||||||||||||||||
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| Basic information | Name: Xinjiang (b) This is NOT an official name: Discredited meteorite. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2005 Country: China Mass:  35 kg | ||||||||||||||||||||||||||
| Classification history: |
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| Comments: |
Entered 16 Feb 2015 Revised 27 Nov 2016: Discredited, now a synonym for Armanty | ||||||||||||||||||||||||||
| Writeup |
Writeup from MB 104:
Xinjiang (b) 47°58.7’N, 88°13.1’E Xinjiang, China Find: 2005 Apr Classification: Iron meteorite (IIIAB) History: The meteorite was purchased from an anonymous finder. It was reportedly found in Aletai region of Xinjiang province, when the finder and his three travel mates took a lunch break. The find was made in April 2005, and snow was not completely melted. Physical characteristics: A rhombus-like chunk with rusted surface. Petrography: (T. Zhang, S. Hu and Y. Lin, IGGCAS) Medium octahedrite, showing a Widmannstaetten structure. Plessite shows intergrowth of kamacite and taenite, with taenite varying from rounded grains (most <5 μm) in the cores to thin lamellae in the margins. Minor schreibersite in kamacite and cohenite in plessite were found. Other minor minerals are troilite, dauberrite and graphite. Geochemistry: Mineral compositions and geochemistry: (G. Wang, GIGCAS, T. Zhang, S. Hu and Y. Lin, IGGCAS) Kamacite: 5.88-7.19 wt.% Ni, 0.18-0.29 wt% Co; Taenite: 11.6-48.2 wt.% Ni. Bulk compositions: Ni: 9.25 wt.%, Ga: 17.7 ppm, Ge: 26.9 ppm, Ir: 0.32 ppm. Classification: (G. Wang, GIGCAS, T. Zhan, S. Hu and Y. Lin, IGGCAS) IIIAB iron. Specimens: The main mass is held by Zhigan Li. Writeup from MB 105: Change of status of the name Xinjiang (b).
"Xinjiang (b)" has been discredited as a distinct meteorite name. Xinjiang (b) is now a synonym for Aletai, and is the recommended name for a 35 kg mass of Aletai. The former classification of this mass as IIIAB is also changed to IIIE-anomalous. | ||||||||||||||||||||||||||
| Data from: MB104 Table 0 Line 0: |
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| Institutions and collections |
IGGCAS: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011) GIGCAS: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, China (institutional address) |
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| References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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