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Grove Mountains 022931
Basic information Name: Grove Mountains 022931
     This is an OFFICIAL meteorite name.
Abbreviation: GRV 022931
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by Chinese Antarctic Research Expedition (CARE)]
Mass:help 1.2 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Ureilite
MetBase:  v. 7.1  (2006)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Writeuphelp
Writeup from MB 89:

Grove Mountains 022931

Antarctica

Found 2003

Achondrite (ureilite)

This is a fragment (1.24 g) without any fusion crust. Classification and mineralogy (CAS): It has a cataclastic porphyritic texture, consisting of coarse-grained olivine (19.1 vol%) and pigeonite (14.1 vol%) embedded in fine-grained carbonaceous matrix (66.3 vol%). The olivine grains have embayed boundaries, and show significantly reduced features with FeO-poor rims (Fa as low as 7 mol%). The reduced rims contain abundant tiny inclusions of Ni-poor metal and sulfides. The pigeonite (En71.7±0.3Wo10.4±0.2Fs17.9±0.2) and the core of olivine (Fa21.2±0.3) are rather homogeneous. The carbonaceous matrix consists predominantly of fine-grained mixtures of forsterite, enstatite, Ni-poor metal and sulfides, with a few diamond-bearing graphite patches. The occurrence of diamond in graphite patches was confirmed by the Raman spectrum and cathodoluminescence. The sample contains many veins of limonite, and appears dark brown in color. Weathering grade, W3; shock stage, S2/S3.

Data from:
  MB89
  Table 4
  Line 50:
Date:22 Jan 2003
Latitude:72°46'28"S
Longitude:75°19'11"E
Mass (g):1.2
Class:Ure
Classifier:B. Miao, Y. Lin, R. Lu and D. Wang, CAS
Comments:See separate entry
Institutions
   and collections
CAS: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)
Catalogs:
Search for this meteorite in the Chinese meteorite database (CHINARE):   
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Geography:

Antarctica
Coordinates:
     Recommended::   (72° 46' 28"S, 75° 19' 11"E)

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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