Meteoritical Bulletin: Entry for Queen Alexandra Range 99473

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Queen Alexandra Range 99473

Basic information

Name: Queen Alexandra Range 99473
This is an OFFICIAL meteorite name.
Abbreviation: QUE 99473
Observed fall: No
Year found: 1999
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 0.27 g

Classification
history:

NHM Catalogue:	5th Edition	(2000)	EH
Antarctic Meteorite Newsletter:	AMN 25(2)	(2002)	EH
Meteoritical Bulletin:	MB 87	(2003)	EH
MetBase:	v. 7.1	(2006)	EH-imp melt
Antarctic Meteorite Newsletter:	AMN 31(1)	(2008)	EH-imp melt
Recommended:			EH-imp melt [explanation]

This is 1 of 6 approved meteorites classified as EH-imp melt. [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites

Comments:

Field number: 12707
Revised 28 Oct 2019: Corrected mass, per JSC

Writeup

Writeup from AMN 25(2):

Sample No.:	QUE 99473
Location:	Queen Alexandra Range
Field No.:	12707
Dimensions (cm):	0.6x0.6x0.4
Weight (g):	0.274
Meteorite Type:	EH Chondrite

Macroscopic Description: Cecilia Satterwhite
98% of the exterior of this meteorite has black fusion crust with oxidation haloes. The interior consists of a brown/black matrix with some metal.

Thin Section (, 2) Description: Linda Welzenbach, Tim McCoy and Gretchen Benedix


Plane-Polarized Light	Cross-Polarized Light

The section shows an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. Olivine is absent. The matrix has an igneous texture typical of impact-melted enstatite chondrites such as Abee. Weathering is modest, with staining of some enstatite grains and minor alteration of metal and sulfides. Microprobe analyses show pyroxene is Fs_1-2. The meteorite appears to be an EH impact melt breccia.

Data from:
  MB87
  Table A1
  Line 179:

Origin or pseudonym:	Goodwin Nunataks Icefields
Mass (g):	0.27
Class:	EH
Weathering grade:	B/C
Ferrosilite (mol%):	1-2

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):

References:

Published in Antarctic Meteorite Newsletter 25(2) (2002), JSC, Houston
Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photographs from AMN:
Photograph from unknown source	A photo is in the write-up above

Geography:

Antarctica

Coordinates:
Catalogue of Meteorites:	(84°S, 168°E)
Recommended::	(84° 37' 1"S, 161° 27' 4"E)

Note: the NHM and recommended coordinates are 99.9 km apart

Statistics:
This is 1 of 40849 approved meteorites from Antarctica (plus 4494 unapproved names)

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