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Gumu
Basic information Name: Gumu
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No, but it is possible
Year found: 2018
Country: China
Mass:help 39 kg
Classification
  history:
Recommended:  H6    [explanation]

This is 1 of 5674 approved meteorites (plus 3 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 14 Dec 2018
Writeuphelp
Writeup from MB 107:

Gumu        33°10.17’N, 85°41.86’E

Tibet, China

Find, possible fall: June 25, 2018

Classification: Ordinary chondrite (H6)

History: There was a rumor that a meteorite fall had happened in the Qiangtang region of Tibet. A local farmer first found a 0.5 kg meteorite on June 25, 2018. After that, 14 kg and 24.5 kg were collected in the same location on July 1 and Aug 5, 2018.

Physical characteristics: About 20 pieces were found, with a total weight of ~39 kg. A few of them are covered with black fusion crust, and some show rusty spots.

Petrography: (N. Wang, Y. Xu and Y. Lin, IGGCAS) It is an equilibrated oridinary chondrite, with homogeneous compositions of olivine and pyroxene. Most of the feldspars are >50 μm in size. The chondrules are very poorly delineated. Fe-Ni metal and troilite, with minor phosphate make up about 20% of the volume.

Geochemistry: The chemical compositions of olivine and pyroxene are homogeneous across the thin section. Olivine: Fa19.1±1.2 (n=28), orthopyroxene: Fs16.3±0.9Wo1.4±0.4 (n=34)

Classification: H6 (N. Wang, Y. Xu and Y. Lin, IGGCAS)

Specimens: Main mass with P. Chen.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Tibet
Place of purchase:Beijing
Date:June 25, 2018
Latitude:33°10.17'N
Longitude:85°41.86'E
Mass (g):39000
Pieces:20
Class:H6
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):19.1
Ferrosilite (mol%):16.3
Wollastonite (mol%):1.4
Classifier:N. Wang, Y. Xu and Y. Lin, IGGCAS
Type spec mass (g):290
Type spec location:IGGCAS
Main mass:Pengli Chen
Finder:Ca Rongpubuciren
Comments:Submitted by Y. Xu, IGGCAS
Institutions
   and collections
IGGCAS: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Wang Ziyao            
Geography:

China
Coordinates:
     Recommended::   (33° 10' 10"N, 85° 41' 52"E)

Statistics:
     This is the only approved meteorite from Tibet, China
     This is 1 of 289 approved meteorites from China (plus 12 unapproved names) (plus 1 impact crater)
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