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Grosvenor Mountains 95505
Basic information Name: Grosvenor Mountains 95505
     This is an OFFICIAL meteorite name.
Abbreviation: GRO 95505
Observed fall: No
Year found: 1995
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 2.03 kg
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 20(1)  (1997)  L3.6
Meteoritical Bulletin:  MB 82  (1998)  L3.3
NHM Catalogue:  5th Edition  (2000)  L3.3
MetBase:  v. 7.1  (2006)  L3.4
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  L3.4
Recommended:  L3.4    [explanation]

This is 1 of 51 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 20(1):
Sample No.:GRO95505
Location:Grosvenor Mountains
Dimensions (cm):14 x 10.5 x 9.5
Weight (g):2031
Meteorite Type:L3 Chondrite (estimated L3.6)
GRO95505

Macroscopic Description: Cecilia E. Satterwhite
The exterior of this ordinary chondrite is covered with black fractured fusion crust on most of its surfaces. Areas without fusion crust are yellow brown and oxidation is heavy in areas. Many inclusions and chondrules are visible. The interior reveals a gray brown matrix with abundant light and dark inclusions ranging in size from 1 - 5 mm. Minor metal and weathering are present.

Thin Section (,2) Description: Brian Mason
The section shows a close-packed aggregate of chondrules (up to 2.4 mm across), chondrule fragments, and mineral grains in a dark matrix containing small amounts of nickel-iron and troilite. The meteorite is considerably weathered, with brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable compositions; olivine, Fa11-26; pyroxene, Fs15-24. The meteorite is classified as an L3 chondrite (estimated L3.6).

Data from:
  MB82
  Table A1
  Line 139:
Origin or pseudonym:Mt. Bumstead
Mass (g):2031
Class:L3.3
Weathering grade:B
Fayalite (mol%):11-26
Ferrosilite (mol%):15-24
Comments:NTL=5±4; 95502 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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