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Grosvenor Mountains 95534
Basic information Name: Grosvenor Mountains 95534
     This is an OFFICIAL meteorite name.
Abbreviation: GRO 95534
Observed fall: No
Year found: 1995
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 17.9 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 19(2)  (1996)  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 372 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from AMN 19(2):
Sample No.: GRO95534; GRO95535
Location: Grosvenor Mountains
Dimensions (cm):   3.0 x 2.7 x 1.5;
3.2 x 2.5 x 2.7
Weight (g): 17.9;
53.8
Meteorite Type: Howardite
    GRO95534

GRO95535 Macroscopic Description: Cecilia E. Satterwhite

The exterior surfaces of these achondrite meteorites have smooth, shiny black fusion crust over seventy five percent of their surface. Areas where fusion crust has been plucked away reveal a gray matrix . The interior reveals a gray fine-grained texture with abundant white inclusions. A few green and black minerals are present. Minor oxidation is present.

Thin Section (GRO95534,3; 95535,5) Description: Brian Mason

The sections are so similar that a single description will suffice; the meteorites are probably paired. They show a groundmass of comminuted pyroxene (orthopyroxene and pigeonite) and plagioclase (grains up to 0.2 mm), with a few larger mineral clasts and rare polymineralic clasts up to 2.5 mm across. Microprobe analyses show a wide range in pyroxene composition: Wo1-40, Fs20-60, En33-79, but with orthopyroxene clustered around Wo8Fs53 to Wo40Fs27 with fairly uniform En content. Plagioclase composition is An86-93. An SiO2 polymorph, probably tridymite, is present in accessory amounts. The meteorites are howardites.

Data from:
  MB82
  Table A1
  Line 168:
Origin or pseudonym:Inner Cecily
Mass (g):17.9
Class:How
Weathering grade:A/B
Ferrosilite (mol%):20-53
Comments:95534 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 19(2) (1996), 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 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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