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Elephant Moraine 87520
Basic information Name: Elephant Moraine 87520
     This is an OFFICIAL meteorite name.
Abbreviation: EET 87520
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 52.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 11(2)  (1988)  Eucrite
AMN 17(1)  (1994)  Eucrite-Mg-rich
Meteoritical Bulletin:  MB 76  (1994)  Eucrite-Mg-rich
NHM Catalogue:  5th Edition  (2000)  Eucrite-Mg rich
MetBase:  v. 7.1  (2006)  Eucrite-cm
Recommended:  Eucrite-Mg rich    [explanation]

This is 1 of 3 approved meteorites classified as Eucrite-Mg rich.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from AMN 11(2):

Sample No.: EET87520

Location: Elephant Moraine

Weight (g): 52.3

Field No.: 4576; 4586

Dimensions (cm): 4.5 x 2.5 x 2.5

Meteorite Type: Unbrecciated Eucrite

 

Macroscopic Description: Roberta Score

This specimen consists of two pieces that fit together. The matrix is dark and fine-grained. It has an igneous texture - graphic intergrowth of coarse plagioclase laths and mafic minerals. Some metal is visible and oxidation is moderate throughout the matrix.

 

Thin Section (,6) Description: Brian Mason

The section shows a granular aggregate of subequal amounts of pyroxene and plagioclase (grains 0.6 - 1.8 mm in maximum dimension), with accessory tridymite and chromite. Most of the pyroxene is pigeonite (average composition Wo5Fs50), but a small amount of augite (Wo37Fs27) is present. Some of the pigeonite grains show narrow exsolution lamellae. Plagioclase composition is An89. The meteorite is an unbrecciated eucrite; it is very similar in texture and mineral compositions to Moore County.

Data from:
  MB76
  Table 2
  Line 1694:
Origin or pseudonym:Meteorite City
Mass (g):52.3
Class:Eu "mg"
Weathering grade:B
Ferrosilite (mol%):27-53
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 11(2) (1988), 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° 11'S, 157° 10'E)

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