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Elephant Moraine 87548
Basic information Name: Elephant Moraine 87548
     This is an OFFICIAL meteorite name.
Abbreviation: EET 87548
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 560 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 12(1)  (1989)  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 12(1):

Sample No.: EET87548

Location: Elephant Moraine

Weight(g): 560.2

Field No.: 4805

Dimensions (cm): 11.5x6.5x5.5

Meteorite Type: Eucrite

 

Macroscopic Description: Cecilia Satterwhite

The exterior of this achondrite is greenish/gray and has a coarse-grained texture with patches of black, shiny fusion crust. The interior is medium-gray with some weathered plagioclase visible.

 

Thin Section, (,5) Description: Brian Mason

The section shows an aggregate of anhedral pyroxene and plagioclase grains (grain size 0.3-1.8 mm), in proportion pyroxene:plagioclase approximately 2:1, with accessory chromite, troilite, and nickel-iron. Individual grains of pyroxene and plagioclase are deformed but not granulated. The pyroxene is hypersthene (Wo2Fs45) with relatively coarse (0.04 mm wide) lamellae of exsolved augite (Wo44Fs17); mean composition of pyroxene is Wo11 Fs38.  Plagioclase is fairly uniform in composition, An89-92. The meteorite is a eucrite, intermediate in composition between Binda and Moore County.

Data from:
  MB76
  Table 2
  Line 1721:
Origin or pseudonym:Main icefield
Mass (g):560.2
Class:Eu "mg"
Weathering grade:B/C
Ferrosilite (mol%):16-45
Comments:NTL=2.3±0.5
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 12(1) (1989), 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° 16' 17"S, 157° 12' 10"E)
Note: the NHM and MetBase coordinates are 9.9 km apart

Statistics:
     This is 1 of 38940 approved meteorites from Antarctica (plus 5051 unapproved names)
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