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Elephant Moraine 84302
Basic information Name: Elephant Moraine 84302
     This is an OFFICIAL meteorite name.
Abbreviation: EET 84302
Observed fall: No
Year found: 1984 or 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 59.6 g
Antarctic Meteorite Newsletter:  AMN 9(3)  (1986)  Achondrite
AMN 13(1)  (1990)  Achondrite-unique
AMN 17(1)  (1994)  Acapulcoite/Lodranite
Meteoritical Bulletin:  MB 76  (1994)  Acapulcoite/Lodranite
NHM Catalogue:  5th Edition  (2000)  Lodranite
MetBase:  v. 7.1  (2006)  Acapulcoite/Lodranite
Recommended:  Acapulcoite/Lodranite    [explanation]

This is 1 of 11 approved meteorites classified as Acapulcoite/Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Primitive achondrites
Writeup from AMN 9(3):

Sample No.: EET84302

Location: Elephant Moraine

Weight (g): 59.6

Field No.: 2195

Dimensions (cm): 4 x 3 x 2.5 cm

Meteorite Type: Achondrite


Macroscopic Description,: Roberta Score

The exterior of this stone is mostly covered with thin fusion crust. Medium-grained pyroxene, plagioclase and some scattered metal comprise the heavily oxidized interior of EET84302.


Thin Section (,3) Description: Brian Mason

The section shows an anhedral granular aggregate (grain size 0.1-0.4 mm), consisting largely of olivine and orthopyroxene, with minor amounts of plagioclase, diopside, nickel-iron, and troilite. Weathering is extensive, with limonitic staining throughout the section. Microprobe analyses gave the following compositions: olivine, Fa5; orthopyroxene, Wo2Fs8; diopside, Wo42Fs3; plagioclase, An23. Texturally this meteorite is an achondrite. However, it resembles a silicate inclusion from an iron meteorite; inclusions with similar texture and mineral compositions have been described from several iron meteorites.

Data from:
  Table 2
  Line 1664:
Origin or pseudonym:Main icefield
Mass (g):59.6
Weathering grade:B/C
Fayalite (mol%):5
Ferrosilite (mol%):8
Search for specimens in the Smithsonian Institution collection (U.S.):   
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References: Published in Antarctic Meteorite Newsletter 9(3) (1986), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 16' 35"S, 157° 10' 34"E)
Note: the NHM and MetBase coordinates are 10.4 km apart

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