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Kumtag 042
Basic information Name: Kumtag 042
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2012
Country: China
Mass:help 65 g
Meteoritical Bulletin:  MB 108  (2020)  L4-6
Recommended:  L4-6    [explanation]

This is 1 of 48 approved meteorites (plus 1 unapproved name) classified as L4-6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Jul 2019
Writeup from MB 108:

Kumtag 042        41°27’21.85"N, 93°37’20.85"E

Xinjiang, China

Find: 2012 Aug 26

Classification: Ordinary chondrite (L4-6)

History: (Ziyao Wang) Discovered by the geologist Wang Jianming (Hami/Xinjiang) during field work in the Kumtag Desert on 26 Aug 2012.

Physical characteristics: (Ziyao Wang) One dark black-brown stone 65 g. No fusion crust recognizable.

Petrography: (R. Bartoschewitz, Bart) breccia of three different lithologies: 1. gray-black matrix with well defined lighter chondrules (0.2-2.0 mm, av. 0.6 mm). 2. Gray-brown recrystallized matrix with chondrules (0.4-1.0 mm, av. 0.6 mm). 3. Black-gray matrix with many vugs (< 0.3 mm) and chondrules (0.4-2.0 mm) of same color. Metal and sulfide inclusions in all three lithologies are irregular.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa24.5±0.8 (n=33); pyroxene Fs20.1±0.4 (n=4), Wo1.8±0.5; feldspar An11Or5 (n=7); chromite CRAL86, FFM76 (n=3); merrillite. Kamacite Ni=6.2, Co=1.0 wt.-% (n=2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 5.07

Classification: Ordinary chondrite (L4-6 breccia, S4, W1)

Specimens: 13.0 g on deposit at Kiel, Ziyao Wang holds the main mass, and 9 g with Bart.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:desert
Date:2012 Aug 26
Mass (g):65
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):24.5±0.8 (n=33)
Ferrosilite (mol%):20.1±0.4 (n=4)
Wollastonite (mol%):1.8±0.5
Magnetic suscept.:5.07
Classifier:R. Bartoschewitz
Type spec mass (g):13.0
Type spec location:Kiel
Main mass:Ziyao Wang
Finder:Jianming Wang
Comments:working name WZ47; submitted by R. Bartoschewitz
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     Recommended::   (41° 27' 22"N, 93° 37' 21"E)

     This is 1 of 291 approved meteorites from Xinjiang, China (plus 4 unapproved names)
     This is 1 of 453 approved meteorites from China (plus 9 unapproved names) (plus 1 impact crater)
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