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Xinjiang (b)
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:help 35 kg
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Iron, IIIAB
Recommended:  Iron, IIIE-an    [explanation]

Comments: Entered 16 Feb 2015
Revised 27 Nov 2016: Discredited, now a synonym for Armanty
Writeuphelp
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:
State/Prov/County:Xinjiang
Place of purchase:Aletai, Xinjiang
Date:2005 Apr
Latitude:47°58.7'N
Longitude:88°13.1'E
Mass (g):35000
Pieces:1
Class:Iron, IIIAB
Classifier:G. Wang, GIGCAS, T. Zhan, S. Hu and Y. Lin, IGGCAS
Type spec mass (g):650
Type spec location:IGGCAS
Main mass:Zhigan Li
Comments:Coordinates are uncertain; submitted by G. Wang, GIGCAS, T. Zhan, S. Hu and Y. Lin, IGGCAS
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)
Catalogs:
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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Geography:

China
Coordinates:
     Recommended::   (47° 58' 42"N, 88° 13' 6"E)
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