Meteoritical Bulletin: Entry for Elephant Moraine 87542

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Elephant Moraine 87542

Basic information

Name: Elephant Moraine 87542
This is an OFFICIAL meteorite name.
Abbreviation: EET 87542
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 609 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 12(1)	(1989)	Eucrite
	AMN 17(1)	(1994)	Eucrite-br
Meteoritical Bulletin:	MB 76	(1994)	Eucrite-br
NHM Catalogue:	5th Edition	(2000)	Eucrite-br
MetBase:	v. 7.1	(2006)	Eucrite-mmict
Recommended:			Eucrite-br [explanation]

This is 1 of 237 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Writeup

Writeup from AMN 12(1):

Sample No.: EET87542

Location: Elephant Moraine

Weight(g): 608.6

Field No.: 4700

Dimensions (cm): 10x8x4.5

Meteorite Type: Eucrite

Macroscopic Description:, Cecilia Satterwhite

This sample is covered by black, shiny fusion crust with radiating flowlines. The interior is light gray and fine-grained with a few very small dark gray to black inclusions.

Thin Section, (,5) Description; Brian Mason,

The section shows an aggregate of pale brown pyroxene-and colorless plagioclase, in part showing relatively coarse ophitic texture (plagioclase laths up to 0.7 mm long, pyroxene grains up to 0.6 mm across), in part finely granulated. Pyroxene compositions show a continuous range from pigeonite to augite: Wo3-41, Fs24-55, En relatively constant, 40-45; mean composition is Wo18Fs38. Plagioclase composition is An86-92, mean An90. Tridymite is present as an accessory. The meteorite is a monomict eucrite.

Data from:
  MB76
  Table 2
  Line 1715:

Origin or pseudonym:	Meteorite City
Mass (g):	608.6
Class:	Eu "br"
Weathering grade:	A
Ferrosilite (mol%):	24-55
Comments:	NTL=0.3±0.1

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
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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° 11'S, 157° 10'E)

Statistics:
This is 1 of 44547 approved meteorites from Antarctica (plus 3802 unapproved names)

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Revision
history:

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