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Grove Mountains 99027
Basic information Name: Grove Mountains 99027
     This is an OFFICIAL meteorite name.
Abbreviation: GRV 99027
Observed fall: No
Year found: 2000
Country: Antarctica [Collected by Chinese Antarctic Research Expedition (CARE)]
Mass:help 10 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Martian (shergottite)
Meteoritical Bulletin:  MB 86  (2002)  Martian (lherzolitic shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-lherzolitic
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 195 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Writeuphelp
Writeup from MB 86:

Grove Mountains 99027

Antarctica

Found 2000 February 8

Martian meteorite (lherzolitic shergottite)

This meteorite weighs 9.97 g, and most of the surface is covered by fusion crust. Classification and mineralogy (Lin and B. Miao, GIG; H. Wang and C. Lin, NU): it is composed mainly of coarse-grained orthopyroxene, olivine, clinopyroxene and plagioclase, with minor opaque minerals. There are two textures. In the larger part of the sections, olivine occurs as rounded euhedral grains, poikilitically enclosed in a megacryst of orthopyroxene; in the other side of the sections, it shows a cumulate texture, consisting of euhedral orthopyroxene, clinopyroxene, olivine and interstitial plagioclase. Chromite, the most common opaque phase, is euhedral and enclosed in pyroxenes. The mineral assemblage and textures are similar to the Allan Hills (ALHA) 77005 lherzolite.  The FeO/MnO (wt%) ratio of orthopyroxene is 34 ± 5. Compositions of orthopyroxene (En66–78Fs20–26Wo2–8), clinopyroxene (En48–52Fs13–15Wo34–39), olivine (Fa22–30) and plagioclase (An49–55Ab44–50Or<1) overlap with the ranges in ALHA77005. Fracturing and undulose extinction in silicates are strong. Plagioclase is commonly deformed, and partially turns into maskelynite along the boundaries of grains. The shock stage is S4; weathering grade, W1. The meteorite is curated at PRIC.

Data from:
  MB86
  Table 1
  Line 27:
Date:8 Feb 2000
Mass (g):9.97
Class:Martian
Classifier:Y. Lin and B. Miao (GIG), K. Tao, Y. Jun and X. Liu (IGG), H. Wang and C. Lin (NU), and J. Liu and Y. Zhou (NAOC)
Type spec location:PRIC
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)
GIG: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China (institutional address; updated 27 Feb 2011)
IGG: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)
NAOC: National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China (institutional address)
NU: School of Earth Sciences and Engineering, Nanjing University, #163 Xianlin Avenue, Nanjing 210023, China, China (institutional address; updated 18 Jul 2015)
Catalogs:
Search for this meteorite in the Chinese meteorite database (CHINARE):   
References: Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (73° 6' 1"S, 75° 14' 13"E)
     Recommended::   (73° 5'S, 75° 12'E)
Note: the NHM and MetBase coordinates are 2.2 km apart

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