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Elephant Moraine 90019
Basic information Name: Elephant Moraine 90019
     This is an OFFICIAL meteorite name.
Abbreviation: EET 90019
Observed fall: No
Year found: 1990
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 21.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(1)  (1992)  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 15(1):

Sample No.: EET90019

Location: Elephant Moraine

Field Number: 6872

Dimensions (cm): 4 x 2 x 1

Weight (g): 21.5

Meteorite Type: Ureilite

 

Macroscopic Description: Cecilia Satterwhite

Dull, black fusion crust covers most of this achondrite. The thickness of the fusion crust varies from thick to thin. Breaking EET90019 revealed a crystalline interior that is red-brown to black in color. Some rusty areas are present. Evaporate deposit is visible on the interior surfaces. Some troilite was noted.

 

Thin Section (,2) Description: Brian Mason

The section shows an aggregate of anhedral to subhedral olivine and pyroxene grains, up to 3 mm across, in a black carbonaceous matrix. The pyroxene shows coarse polysynthetic twinning. Microprobe analyses give the following compositions: olivine, Fa11 (CaO content is 0.3%); pyroxene, Wo10Fs10. The meteorite is a ureilite; it

appears to be distinct from the other EET ureilites.

 

Data from:
  MB76
  Table 2
  Line 2052:
Origin or pseudonym:Texas Bowl
Mass (g):21.5
Class:Ur
Weathering grade:B/Ce
Fayalite (mol%):11
Ferrosilite (mol%):10
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 15(1) (1992), 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' 52"S, 156° 23' 41"E)
Note: the NHM and MetBase coordinates are 23.2 km apart

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