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Elephant Moraine 83228
Basic information Name: Elephant Moraine 83228
     This is an OFFICIAL meteorite name.
Abbreviation: EET 83228
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1206 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 8(1)  (1985)  Eucrite-pmict
Meteoritical Bulletin:  MB 76  (1994)  Eucrite-pmict
NHM Catalogue:  5th Edition  (2000)  Eucrite-pmict
MetBase:  v. 7.1  (2006)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 341 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from AMN 8(1):

Sample No.: EET83228

Location: Elephant Moraine

Weight (g): 1206.0

Field No.: 2862

Dimensions (cm): 12.5 x 11.5 x 8.5

Meteorite Type: Polymict Eucrite

 

Macroscopic Description: Roberta Score

One small patch of black fusion crust remains on EET83228. Fracturing is moderate. The exterior surfaces are darker gray than the interior surfaces. There are many areas that are heavily oxidized. Numerous deep vugs are present on all exterior surfaces. Clasts of different types are abundant. This stone is similar to other 1983 Elephant Moraine eucrites.

 

Thin Section (,4) Description: Jeremy Delaney

A polymict achondrite breccia with a few small lithic clasts. These lithic clasts have the variety of textures seen in mafic clasts from howardites and polymict eucrites varying from medium-coarse granular clasts to interstitial basalts. A few large orthopyroxene clasts have concentric zoning (cores are En70-75) suggesting exchange reactions with the surrounding breccia are present. These modified pyroxene clasts are similar to clasts in EETA79004 with which this sample may be paired.

Data from:
  MB76
  Table 2
  Line 1493:
Origin or pseudonym:Main icefield
Mass (g):1206
Class:Eu "pm"
Weathering grade:B
Ferrosilite (mol%):18-54
Comments:79004 pairing group
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° 17' 7"S, 157° 14' 20"E)
Note: the NHM and MetBase coordinates are 11.5 km apart

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