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Toksun 001
Basic information Name: Toksun 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2020
Country: China
Mass:help 16 kg
Recommended:  LL6/7    [explanation]

This is 1 of 5 approved meteorites classified as LL6/7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Apr 2022
Writeup from MB 111:

Toksun 001        42°41.635’N, 88°37.129’E

Xinjiang, China

Find: 2020 Apr 3

Classification: Ordinary chondrite (LL6/7)

History: (Ziyao Wang) Discovered by Weiya Zhang and Baozhen Wan 3.5 km south of Toksan power plant, on Apr. 3, 2020. and was purchased by Ziyao Wang on Apr.12, 2020.

Physical characteristics: (Ziyao Wang) 16 kg gray black stone, with rather fresh fusion crust and regmaglypts. Cut face shows light fragments in a dark-gray matrix with tiny metallic specks and few greenish silicates.

Petrography: (R. Bartoschewitz, Bart) Breccia of light-gray subrounded granoblastic clasts up to 1 cm in black-gray cataclastic matrix. Granoblastic areas show heterogenous grain sizes of about 30-600 µm. Predominant phase is olivine, minor low-Ca pyroxene (<500 µm) and feldspar with interstitial interconnected texture (up to 600 µm) enclosing smaller olivine and pyroxene grains (including close packed aggregates of small spherical 10 µm olivine/pyroxene grains), few augite (<100 µm) with exsolution lamellae and accessory chromite (up to 200 μm). Sulfide <600 µm) and metal (<30 µm) occur as angular single grains. The cataclastic matrix is enriched in sulfide and metal, but stronger replaced by Fe-oxyhydroxides that fill the cracks. Few remnant relict chondrule fragments occur as well in the granoblastic as well as in the cataclastic area.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Microprobe results from the granoblastic and cataclastic areas are the same. Olivine Fa30.4±0.6 (n=77); low-Ca pyroxene Fs25.7±0.9Wo1.5±0,3 (n=11); augite En46Fs10Wo44 (n=4); feldspar An10.5±0.6Or4.8±0.9 (n=16); chromite CRAL=85, FFM=92 (n=4). Kamacite Ni=6-7 wt%, Co=0.7-0.9 wt% (n=3); taenite, tetrataenite, troilite, Ni-bearing pyrrhotite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 3.75. O-isotopes (A. Pack and T. Di Rocco, UGött): δ17O (‰) = 4.159, δ18O (‰) = 5.772, D’17O (0.528) = 1.111.

Classification: Ordinary chondrite (LL6/7, S4).

Specimens: 22.7 g on deposit at Kiel, Ziyao Wang holds the main mass, and 182 g plus polished thin section with Bart.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:desert
Date:2020 Apr 3
Mass (g):16000
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):31.4±0.6 (n=77)
Ferrosilite (mol%):25.7±0.9 (n=11)
Wollastonite (mol%):1.5±0.3
Magnetic suscept.:3.75
Classifier:R. Bartoschewitz
Type spec mass (g):22.7
Type spec location:Kiel
Main mass:Ziyao Wang
Finder:Weiya Zhang and Baozhen Wan
Comments:working name WZ160; submitted by R. Bartoschewitz
Plots: O isotopes:  
   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)
UGött: Geowissenschaftliches Museum, Georg-August-Universität Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany; Website (institutional address; updated 26 Nov 2020)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang         

     Recommended::   (42° 41' 38"N, 88° 37' 8"E)

     This is 1 of 298 approved meteorites from Xinjiang, China (plus 5 unapproved names)
     This is 1 of 462 approved meteorites from China (plus 10 unapproved names) (plus 1 impact crater)
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