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Elephant Moraine 87517
Basic information Name: Elephant Moraine 87517
     This is an OFFICIAL meteorite name.
Abbreviation: EET 87517
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 273 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 11(2)  (1988)  Ureilite
Meteoritical Bulletin:  MB 76  (1994)  Ureilite
NHM Catalogue:  5th Edition  (2000)  Ureilite
MetBase:  v. 7.1  (2006)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 499 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Writeuphelp
Writeup from AMN 11(2):

Sample No.: EET87517

Location: Elephant Moraine

Weight (g): 272.6

Field No.: 2149

Dimensions (cm): 7 x 4.5 x 4

Meteorite Type: Ureilite

 

Macroscopic Description: Roberta Score

This ureilite fragment has both shiny and dull fusion crust. Flow marks are visible on some of the shiny fusion crust and some of the dull fusion crust is frothy and pitted. Areas devoid of fusion crust are crystalline and black and green in color. Oxidation is moderate to heavy. The interior is heavily oxidized. Green and black platy minerals are surrounded by oxidized matrix. The meteorite is extremely coherent.

 

Thin Section (,6) Description: Brian Mason

The section shows a close-packed aggregate of subhedral to anhedral grains (0.3-1.8 mm) of olivine and pyroxene in subequal amounts. Some pyroxene grains show very narrow exsolution lamellae, presumably augite. Individual grains have thin rims of black matrix. Weathering is extensive, with brown limonitic staining throughout the section. Microprobe analyses give the following compositions: olivine, Fa8, pyroxene, Wo5Fs8. The meteorite is a ureilite and is relatively unshocked.

Data from:
  MB76
  Table 2
  Line 1691:
Origin or pseudonym:Meteorite City
Mass (g):272.6
Class:Ur
Weathering grade:B/C
Fayalite (mol%):8
Ferrosilite (mol%):8
Comments:NTL=<1
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 38940 approved meteorites from Antarctica (plus 5051 unapproved names)
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