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Tavn-Gashun
Basic information Name: Tavn-Gashun
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No, it is doubtful that it is a fall
Year found: 1991
Country: Russia
Mass:help 4.24 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H5
Recommended:  H5    [explanation]

This is 1 of 10308 approved meteorites (plus 45 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 11 Apr 2016
Writeuphelp
Writeup from MB 105:

Tavn-Gashun        45°59.47’N, 46°24.18’E

Kalmykiya-Khal’mg Tangch, Russia

Find, doubtful fall: 2 Jul 1991

Classification: Ordinary chondrite (H5)

History: On July 2, 1991, at 1-2 a.m. (UTC+3), Mr. D. A. Zharkov was in a tent and heard a whistling sound followed by, a dull sound of something falling. In the morning, Mr. Zharkov found a meteorite within 20-30 m of the tent. He was 37.5 km west of the willage Tavn-Gashun. Macroscopic examination and petrographic study show that this is not a fresh fall. The meteorite is partly covered with carbonates (D. A. Kazakov, private communication). Between 1991 and 2004 the stone was broken into two fragments, one of which (~300 g) was lost. Analyst N.N. Kononkova (Vernad)

Physical characteristics: Physical characterisics: A stone of oriented shape with regmaglypted surface, completely covered with brown fusion crust. The mass of the stone is 4240 g.

Petrography: The meteorite contains chondrule fragments (500-1200 μm), a few whole chondrules (250-500 μm), FeNi metal (300-600 μm) and metal-troilite aggregates. Matrix is fine-grained, crystalline, and has granular metamorphic texture. The olivine grains display undulatory extinction and planar deformation features. The metal grains are partly replaced by FeNi hydroxides. The veinlets of FeNi hydroxides cross the rock.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Kalmykiya-Khal'mg Tangch
Date:2 Jul 1991
Latitude:45°59.47'N
Longitude:46°24.18'E
Mass (g):4240
Pieces:1
Class:H5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):18.1±0.3 (n=5)
Ferrosilite (mol%):15.8±0.2 (n=5)
Wollastonite (mol%):1.2
Classifier:C. A. Lorenz, Vernad.
Type spec mass (g):141
Type spec location:Vernad.
Main mass:Mr. D. A. Kazakov, kazak72@mail.ru
Finder:Mr. D. A. Zharkov
Comments:Submitted by C. A. Lorenz
Institutions
   and collections
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Alan Mazur   
Geography:

Russia
Coordinates:
     Recommended::   (45° 59' 28"N, 46° 24' 11"E)

Statistics:
     This is 1 of 2 approved meteorites from Kalmykiya-Khal'mg Tangch, Russia
     This is 1 of 149 approved meteorites from Russia (plus 5 unapproved names) (plus 19 impact craters)
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