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Elephant Moraine 92022
Basic information Name: Elephant Moraine 92022
     This is an OFFICIAL meteorite name.
Abbreviation: EET 92022
Observed fall: No
Year found: 1992
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 9.7 g
Antarctic Meteorite Newsletter:  AMN 17(1)  (1994)  Howardite
Meteoritical Bulletin:  MB 79  (1996)  Howardite
NHM Catalogue:  5th Edition  (2000)  Howardite
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 453 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeup from AMN 17(1):

Sample No.: EET92022

Location: Elephant Moraine

Dimensions (cm): 2.0 x 2.0 x 0.7

Weight (g): 9.7

Meteorite Type: Howardite


Macroscopic Description: Carol Schwarz

The exterior of this tabular-shaped meteorite has shiny black fusion crust which has been weathered away in areas. The interior matrix is light gray. Very small gray, white and yellowish inclusions are abundant. This meteorite has only minor oxidation.


Thin Section (,2) Descrmtion: Brian Mason

The section shows a brecciated structure, with clasts of orthopyroxene, pigeonite, and plagioclase up to 1.2 mm across in a comminuted groundmass of these minerals; two gabbroic clasts, 3.2 and 1.8 mm across, were noted. Microprobe analyses show a wide range in pyroxene compositions: Wo1-22, Fs20-53, En35-79; orthopyroxene compositions cluster around Wo3Fs24. Plagioclase composition is An90-95. The meteorite is a Howardite; mineral compositions and texture are similar to the EET87503 group of howardites, and the possibility of pairing should be considered.


Data from:
  Table 2
  Line 222:
Origin or pseudonym:Northern Ice Patch
Mass (g):9.7
Weathering grade:A
Ferrosilite (mol%):20-53
Comments:87503 pairing group
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References: Published in Antarctic Meteorite Newsletter 17(1) (1994), JSC, Houston
Published in Meteoritical Bulletin, no. 79, MAPS 31, A161-A174 (1996)
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     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 1' 28"S, 156° 1' 9"E)
Note: the NHM and MetBase coordinates are 35.5 km apart

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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