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Elephant Moraine 83247
Basic information Name: Elephant Moraine 83247
     This is an OFFICIAL meteorite name.
Abbreviation: EET 83247
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 22.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 8(1)  (1985)  Aubrite (?)
AMN 8(2)  (1985)  Diogenite
Meteoritical Bulletin:  MB 76  (1994)  Diogenite
NHM Catalogue:  5th Edition  (2000)  Diogenite
MetBase:  v. 7.1  (2006)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 422 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Writeuphelp
Writeup from AMN 8(1):
[From AMN 8(1):]

Sample No.: EET83247

Field No.: 2711

Location: Elephant Moraine

Weight (g): 22.5

Dimensions (cm): 4 x 2.5 x 1.5

Meteorite Type: Aubrite (?)

 

Macroscopic Description: Roberta Score

Shiny black fusion crust covers approximately one quarter of EET83247. Half of the exterior surfaces have weathered to a reddish-brown. Half is medium gray with large cream-colored clasts. One fine-grained black clast was noted. Most of the exposed interior has been heavily oxidized.

 

Thin Section (,4) Description: Jeremy Delaney

This is texturally similar to ALH83015 and contains lithic fragments with both pyroxene and olivine. Pyroxene composition is En72Wo2.5 and is, therefore, different from the Elephant Moraine 79002 diogenite which contains En76Wo2.


[From AMN 8(2):]

RECLASSIFICATION OF EET83247 AS A DIOGENITE

Meteorite EET83247 was listed in the previous Newsletter issue (8(1), p. 31) as an "aubrite (?)" However, a mistake in the classification report was not discovered until after the Newsletter was mailed. Be advised that EET83247 is a diogenite.

Data from:
  MB76
  Table 2
  Line 1511:
Origin or pseudonym:Main icefield
Mass (g):22.5
Class:Diog
Weathering grade:B/C
Ferrosilite (mol%):23
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 8(1) (1985), 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° 18' 2"S, 157° 17' 33"E)
Note: the NHM and MetBase coordinates are 13.5 km apart

Statistics:
     This is 1 of 38937 approved meteorites from Antarctica (plus 5051 unapproved names)
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