Meteoritical Bulletin: Entry for Elephant Moraine 83231

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Elephant Moraine 83231

Basic information

Name: Elephant Moraine 83231
This is an OFFICIAL meteorite name.
Abbreviation: EET 83231
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 66.4 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 408 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Writeup

Writeup from AMN 8(1):

Sample No.: EET83231

Location: Elephant Moraine

Weight (g): 66.4

Field No.: 1344

Dimensions (cm): 5.5 x 4 x 4.5

Meteorite Type: Polymict Eucrite

Macroscopic Description: Roberta Score

This stone is very angular and contains numerous vesicles. No fusion vcust is present. EET83231 looks similar to the other 1983 Elephant Moraine eucrites.

Thin Section (,4) Description: Jeremy Delaney

Polymict achondritic breccia containing several fine- and very fine-grained mafic clasts. Numerous orthopyroxene clasts similar to diogenetic pyroxene are present. Mafic clasts vary from coarse-grained subophitic basalts with and without optically zoned pyroxene and feldspar to uncommon glassy clasts with fine crystallites.

Data from:
  MB76
  Table 2
  Line 1496:

Origin or pseudonym:	Main icefield
Mass (g):	66.4
Class:	Eu "pm"
Weathering grade:	B
Ferrosilite (mol%):	37-51
Comments:	79004 pairing group

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 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' 44"S, 157° 14' 18"E)

Note: the NHM and MetBase coordinates are 12.7 km apart

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

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