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Elephant Moraine 92001
Basic information Name: Elephant Moraine 92001
     This is an OFFICIAL meteorite name.
Abbreviation: EET 92001
Observed fall: No
Year found: 1992
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 4.02 kg
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 16(2)  (1993)  Mesosiderite
Meteoritical Bulletin:  MB 76  (1994)  Mesosiderite
NHM Catalogue:  5th Edition  (2000)  Mesosiderite
MetBase:  v. 7.1  (2006)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 188 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Writeuphelp
Writeup from AMN 16(2):

Sample No.: EET92001

Location: Elephant Moraine

Dimensions (cm): 20.5 x 11.0 x 9.0

Weight (g): 4015.6

Meteorite Type: Mesosiderite

 

Macroscopic Description: Cecilia Satterwhite

The largest inclusion visible on the exterior of this brown-colored mesosiderite is 4 x 2.8 centimeters. Regmaglypts and flow lines are visible on the few patches of fusion crust that have not weathered away. Minor fractures were noted on the exterior but do not penetrate through the interior of the meteorite. The interior is reddish-brown and fine-grained with abundant metal and silicate inclusions. The inclusions vary in size, shape, and color.

 

Thin Section (,7) Description: Brian Mason

The section shows a granular aggregate of approximately 40% nickel-iron, 40% pyroxene, and 20% plagioclase, with accessory merrillite and an SiO2 polymorph, probably tridymite. The grain size is relatively coarse, with individual pyroxenes and plagioclases up to 1 mm across. Many pyroxenes are partly or completely converted to a mosaic of small granules. Pyroxene compositions are somewhat variable, from Wo2Fs30 to Wo11 Fs28. Plagioclase composition is An90-92. The meteorite is a mesosiderite; it can be confidently paired with EET87500 and EET87501.

 

Data from:
  MB76
  Table 2
  Line 2843:
Origin or pseudonym:Northern Ice Patch
Mass (g):4015.6
Class:Meso
Weathering grade:B
Ferrosilite (mol%):28-30
Comments:87500 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 16(2) (1993), 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° 2' 16"S, 156° 8' 23"E)
Note: the NHM and MetBase coordinates are 32 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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