Meteoritical Bulletin: Entry for Elephant Moraine 90019

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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: 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 604 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Writeup

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:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):

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 43332 approved meteorites from Antarctica (plus 3802 unapproved names)

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