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Grove Mountains 050212
Basic information Name: Grove Mountains 050212
     This is an OFFICIAL meteorite name.
Abbreviation: GRV 050212
Observed fall: No
Year found: 2006
Country: Antarctica [Collected by Chinese Antarctic Research Expedition (CARE)]
Mass:help 12.3 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 185 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 4 Mar 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Grove Mountains 050212                             72°57'11''S, 75°13'58''E

Grove Mountains, Antarctica

Find: 8 January 2006

Mesosiderite

History and Physical characteristics: The meteorite was found in a large moraine west to the middle segment of the Gale Escarpment in Grove Mountains by Y. Ju. It has a round shape with a small fraction of black fusion crust remaining. The meteorite weighs 0.96 g.

Petrography: (Y. Lin, S. Hu, and L. Feng, IGGCAS) It contains 12.3 vol% of metallic Fe-Ni and is significantly weathered. The silicate part consists of various large fragments of pyroxenes, plagioclase and silica mineral, eucritic lithologies, and fine-grained matrix. All fragments of pigeonite and augite show exsolutions, while those of orthopyroxene rarely contain lamellae of Ca-rich pyroxene, but highly heterogeneous among grains and zoned with bright rims. The fine-grained matrix shows ophitic texture, consisting mainly of pigeonite and plagioclase with less abundant augite, silica and chromite. Minor phosphates occur mainly close to metals.

Mineral compositions and Geochemistry: (Y. Lin, S. Hu, L. Xu, and L. Feng, IGGCAS). Plagioclase is rather homogeneous, with An95-99. The fragments of orthopyroxene are highly heterogeneous, with Fs contents of the cores varying from 18 mol% to 60 mol%. The FeO/MnO (in weight) = 29 ± 3. Low-Ca lamellae (Fs41-60Wo2-6) high-Ca lamellae (Fs21-28Wo40-42). Minor olivine (Fa67). Kamacite (Ni = 4.71-6.31 wt%; Cr = 0.65-0.75 wt%); taenite (Ni = 39.9-41.8 wt%); troilite has no detectable Cr by EPMA.

Classification: Mesosiderite, significantly weathered.

Type specimens: PRIC holds the main mass and a polished section.

Data from:
  MB93
  Table 6
  Line 443:
Date:8-Jan-2006
Latitude:72°57'11"S
Longitude:75°13'58"E
Mass (g):0.96
Pieces:1
Class:Mesosiderite
Classifier:IGGCAS
Main mass:PRIC
Institutions
   and collections
PRIC: Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200129, China; Website (institutional address; updated 9 Apr 2013)
IGGCAS: 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. 93, MAPS 43, 571-632 (2008)
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Geography:

Antarctica
Coordinates:
     Recommended::   (72° 57' 11"S, 75° 13' 58"E)

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