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Alatage Mountain 031
Basic information Name: Alatage Mountain 031
     This is an OFFICIAL meteorite name.
Abbreviation: AM 031
Observed fall: No
Year found: 2013
Country: China
Mass:help 38 g
Meteoritical Bulletin:  MB 103  (2014)  L5
Recommended:  L5    [explanation]

This is 1 of 8504 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Nov 2014
Writeup from MB 103:

Alatage Mountain 031 (AM 031)        41°41’18.2"N, 92°56’37.4"E

Xinjiang, China

Found: 1 May 2013

Classification: Ordinary chondrite (L5)

History: An expedition found 42 meteorites between 30 April and 1 May 2013 in a 2.7 × 1.4 km area 80 km east of Alatage Mountain. The expedition included Bingkui Miao, Yangting Lin, Shijie Li, Deqiu Dai, Wenjie Shen, Sen Hu, Lei Kesi, Peng Wang, and Zhipeng Xia.

Physical characteristics: Total mass: 38 g (only 1 piece) no fusion crust, gray surface

Petrography: The meteorite consists of olivine, orthopyroxene, and feldspar, associated with comparatively minor amounts of clinopyroxene, Fe-Ni, diopside, troilite, chromite and phosphate. Chondrules are commomly deformed and the boundaries are not clear. The matrix is fine-grained and the feldspars have sizes over 2 μm. Shock-induced metal-sulfide veins and melt pockets are pervasive. More than 50% of metal and sulfide is oxidized.

Geochemistry: Minerals are uniform. Olivine: Fa22.9±0.9 (n=7); low-Ca pyroxene: Fs19.8±1.1Wo1.6±0.3 (n=11)

Classification: Ordinary chondrite L5; S5; W2.

Specimens: 9 g sample and one thin section are deposited in GUT.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Gobi Desert
Date:1 May 2013
Mass (g):38
Shock stage:S5
Weathering grade:W2
Fayalite (mol%):21.1±0.4 (n=14)
Ferrosilite (mol%):17.5±0.4 (n=15)
Wollastonite (mol%):2.7±0.9 (n=15)
Classifier:Z. Xia, B. Miao, H. Chen, GUT
Type spec mass (g):9
Type spec location:GUT
Main mass:Peng Wang in Hami, Xinjiang,China
Finder:Bingkui Miao et al.
Comments:Submitted by Zhipeng Xia
   and collections
GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     Recommended::   (41° 41' 18"N, 92° 56' 37"E)

     This is 1 of 293 approved meteorites from Xinjiang, China (plus 5 unapproved names)
     This is 1 of 457 approved meteorites from China (plus 10 unapproved names) (plus 1 impact crater)
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