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Elephant Moraine 90024
Basic information Name: Elephant Moraine 90024
     This is an OFFICIAL meteorite name.
Abbreviation: EET 90024
Observed fall: No
Year found: 1990
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 22.8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  Eucrite
AMN 17(1)  (1994)  Eucrite-br
Meteoritical Bulletin:  MB 76  (1994)  Eucrite-br
NHM Catalogue:  5th Edition  (2000)  Eucrite-br
MetBase:  v. 7.1  (2006)  Eucrite
Recommended:  Eucrite-br    [explanation]

This is 1 of 167 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from AMN 14(2):

Sample No.: EET90024

Location: Elephant Moraine

Field Number: 6945

Dimensions (cm): 2.9 x 2.5 x 1.8

Weight (g): 22.8

Meteorite Type: Eucrite

 

Macroscopic Description: Cecilia Satterwhite

The exterior of this achondrite is covered with dull black fusion crust but some patches are shiny/glassy. Areas without fusion crust are brownish in color. Gray matrix with white inclusions (plagioclase?) makes up the interior. Black glassy veins enclose small inclusions and oxidation is speckled throughout the specimen.

 

Thin Section (,4) Description: Brian Mason

The section shows large pyroxene crystals, up to 6 mm long, with a minor amount of interstitial plagioclase. The pyroxene crystals are somewhat granulated, and both the plagioclase and the pyroxene show undulose extinction. Dark glassy veins, up to 1.2 mm across, are present. The pyroxene shows a range of compositions, from Wo2Fs60 to Wo42Fs28, with relatively uniform En content; mean composition is Wo13Fs50. Plagioclase composition is An89-92. The meteorite is a eucrite.

 

Data from:
  MB76
  Table 2
  Line 2057:
Origin or pseudonym:Texas Bowl
Mass (g):22.8
Class:Eu "br"
Weathering grade:B
Ferrosilite (mol%):26-60
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 14(2) (1991), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 17' 18"S, 156° 28' 43"E)
Note: the NHM and MetBase coordinates are 21.7 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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