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Grosvenor Mountains 95602
Basic information Name: Grosvenor Mountains 95602
     This is an OFFICIAL meteorite name.
Abbreviation: GRO 95602
Observed fall: No
Year found: 1995
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 51.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 20(1)  (1997)  Howardite
Meteoritical Bulletin:  MB 82  (1998)  Howardite
NHM Catalogue:  5th Edition  (2000)  Howardite
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 380 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from AMN 20(1):
Sample No.: GRO95602
Location: Grosvenor Mountains
Dimensions (cm): 4.3 x 3.6 x 1.0
Weight (g): 51.5
Meteorite Type: Howardite
GRO95602

Macroscopic Description: Cecilia E. Satterwhite
The exterior of this achondrite is covered with black fusion crust. The fusion crust is shiny on some surfaces, dull on others. A large black clast (1.2 cm) is present on the exterior. Smaller clasts are visible (0.5 cm). Areas devoid of fusion crust are gray with light and dark inclusions. Chipping revealed a fine grained gray interior, with abundant light and dark inclusions, ranging in size from 1 to 3 mm. Minor oxidation is visible in some areas.

Thin Section (,3) Description: Brian Mason
The section shows a groundmass of comminuted pyroxene and plagioclase (grains up to 0.3 mm) with a few larger plagioclase clasts (up to 2 mm). Microprobe analyses show that most of the pyroxene is hypersthene (Wo1-5, Fs22-36); one grain of augite, Wo42Fs32, was analyzed, and several grains of intermediate composition. Plagioclase composition is An86-91. One grain of olivine, Fa25, and one of an SiO2 polymorph were analyzed. The meteorite is a howardite, very similar to GRO95534, and 95535, and 95581, with which it is probably paired.

Data from:
  MB82
  Table A1
  Line 236:
Origin or pseudonym:Inner Cecily
Mass (g):51.5
Class:How
Weathering grade:A/B
Fayalite (mol%):25
Ferrosilite (mol%):17-49
Comments:95534 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 20(1) (1997), JSC, Houston
Published in Meteoritical Bulletin, no. 82, MAPS 33, A221-A240 (1998)
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Photos:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
courtesy Dr Carlton Allen, JSC-KT, NASA   
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (85° 40'S, 175° 0'E)
     Recommended::   (85° 40'S, 175° 0'E)

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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