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Alatage Mountain 020
Basic information Name: Alatage Mountain 020
     This is an OFFICIAL meteorite name.
Abbreviation: AM 020
Observed fall: No
Year found: 2013
Country: China
Mass:help 10.3 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  L5
Recommended:  L5    [explanation]

This is 1 of 8831 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 1 Apr 2017
Writeuphelp
Writeup from MB 106:

Alatage Mountain 020 (AM 020)        41°41’16.0"N, 92°56’16.4"E

Xinjiang, China

Find: 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: 10.3 g (only 1 piece) no fusion crust, gray surface

Petrography: Chondrule types in AM 020 mainly include barred olivine chondrule. The matrix is fine-grained and the feldspars have sizes over 2 μm. Shock-induced metal-sulfide veins and melt pockets are pervasive. Many mineral grains are fractured seriously. More than 40% metal and sulfide are oxidized.

Geochemistry: Minerals are uniform. Olivine: Fa22.5±0.6 (n=10); low-Ca pyroxene: Fs18.5±5Wo2.6±1 (n=10)

Classification: Ordinary chondrite L5; S5; W2.

Specimens: 3 g sample and one thin section are deposited in GUT.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Xinjiang
Origin or pseudonym:Gobi Desert
Date:1 May 2013
Latitude:41°41'16.0"N
Longitude:92°56'16.4"E
Mass (g):10.3
Pieces:1
Class:L5
Shock stage:S5
Weathering grade:W2
Fayalite (mol%):22.5±0.6 (n=10)
Ferrosilite (mol%):18.5±5 (n=10)
Wollastonite (mol%):2.6±1 (n=10)
Classifier:Z. Xia, B. Miao, H. Chen, GUT
Type spec mass (g):3
Type spec location:GUT
Main mass:Guiqin Wang in Guangzhou, China
Finder:Bingkui Miao et al.
Comments:Submitted by Zhipeng Xia
Institutions
   and collections		 GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography:

China
Coordinates:
     Recommended::   (41° 41' 16"N, 92° 56' 16"E)

Statistics:
     This is 1 of 322 approved meteorites from Xinjiang, China (plus 6 unapproved names)
     This is 1 of 489 approved meteorites from China (plus 13 unapproved names) (plus 1 impact crater)
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