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Queen Alexandra Range 94204
Basic information Name: Queen Alexandra Range 94204
     This is an OFFICIAL meteorite name.
Abbreviation: QUE 94204
Observed fall: No
Year found: 1994
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 2.43 kg
Antarctic Meteorite Newsletter:  AMN 19(1)  (1996)  E7
Meteoritical Bulletin:  MB 79  (1996)  E7
NHM Catalogue:  5th Edition  (2000)  E7
MetBase:  v. 7.1  (2006)  EH7
Recommended:  EH7    [explanation]

This is the only approved meteorite classified as EH7.
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Writeup from AMN 19(1):
Sample No.: QUE 94204   ;
Location: Queen Alexandra Range
Dimensions (cm): 16.5 x 10.0 x 9.5
Weight (g): 2427.9
Meteorite Type: E7 chondrite
QUE94204 QUE94204

Macroscopic Description: Kathleen McBride
Smooth, brown, fusion crust covers ~30% of the exterior surface. Areas devoid of fusion crust are extremely weathered and have a rough, pitted texture. Metal is still obvious in the interior despite the extremely weathered condition of this stone.

Thin Section (,2) Description: Brian Mason
The section shows a granular aggregate of about 75% pyroxene (average grain size 1.5 mm), 20% nickel-iron and troilite, and 5% intergranular plagioclase. The meteorite is severely weathered, with much of the nickel-iron altered to brown limonite. Some of the metal grains contain numerous inclusions of graphite. Microprobe analyses show that the pyroxene is close to MgSiO3 in composition, with a few more iron-rich grains. Plagioclase composition is An19-26. The nickel-iron contains 2.4-2.9% Si. The mineralogy is that of an enstatite chondrite, but no chondrules are present; therefore the meteorite is tentatively classified as E7. It resembles Ilafegh 009 (Geochim. Cosmochim. Acta, v. 59, p. 161, 1995).

Data from:
  Table 2
  Line 1322:
Origin or pseudonym:Tail's End Icefield
Mass (g):2427.9
Weathering grade:C
Ferrosilite (mol%):0-5
Search for specimens in the Smithsonian Institution collection (U.S.):   
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References: Published in Antarctic Meteorite Newsletter 19(1) (1996), JSC, Houston
Published in Meteoritical Bulletin, no. 79, MAPS 31, A161-A174 (1996)
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Photographs from AMN:
Photograph from unknown source A photo is in the write-up above

     Catalogue of Meteorites:   (84°S, 168°E)
     Recommended::   (84°S, 168°E)

     This is 1 of 38431 approved meteorites from Antarctica (plus 5051 unapproved names)
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