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Grosvenor Mountains 95545
Basic information Name: Grosvenor Mountains 95545
     This is an OFFICIAL meteorite name.
Abbreviation: GRO 95545
Observed fall: No
Year found: 1995
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 142.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 19(2)  (1996)  L3.5
Meteoritical Bulletin:  MB 82  (1998)  L3.5
NHM Catalogue:  5th Edition  (2000)  L3.5
MetBase:  v. 7.1  (2006)  L3.5
Recommended:  L3.5    [explanation]

This is 1 of 95 approved meteorites classified as L3.5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 19(2):
Sample No.: GRO95544; GRO95545
Location: Grosvenor Mountains
Dimensions (cm): 8.0 x 7.5 x 6.0;7.0 x 5.0 x 3.0
Weight (g): 626.0;142.1
Meteorite Type: L3 Chondrites (estimated L3.5)

Macroscopic Description: Kathleen McBride

The exterior of these meteorites have thin, patchy fusion crust. In some areas fusion crust has been weathered away. The interior is dark brown with numerous chondrules. Chondrules are white to yellow in color and measure 1 to 4 mm in size. Some appear rusty. Metal grains are present and samples are very coherent and difficult to break.

Thin Section (GRO95544,5;95545,4) Description: Brian Mason

The sections are so similar that a single description will suffice; the meteorites are probably paired. The sections show numerous chondrules and chondrule fragments, up to 2.4 mm across, in a black matrix containing small amounts of nickel-iron and troilite. The chondrules are mainly granular and porphyritic olivine and olivine-pyroxene, with a few radiating and crytocrystalline pyroxene. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-20, mean Fa14; pyroxene, Fs1-28. The meteorites are classified as L3 chondrites (estimated L3.5).

Data from:
  MB82
  Table A1
  Line 179:
Origin or pseudonym:Outer Cecily
Mass (g):142.1
Class:L3.5
Weathering grade:B
Fayalite (mol%):1-20
Ferrosilite (mol%):4-28
Comments:NTL=<1; 95502 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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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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