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Elephant Moraine 90992
Basic information Name: Elephant Moraine 90992
     This is an OFFICIAL meteorite name.
Abbreviation: EET 90992
Observed fall: No
Year found: 1990
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 5.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 17(3)  (1994)  EL3
Meteoritical Bulletin:  MB 79  (1996)  EL3
NHM Catalogue:  5th Edition  (2000)  EL3
MetBase:  v. 7.1  (2006)  EL3
Recommended:  EL3    [explanation]

This is 1 of 22 approved meteorites classified as EL3.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites
Writeuphelp
Writeup from AMN 17(3):
Sample No.: EET90992
Location: Elephant Moraine
Dimensions (cm): 1.9 x 1.6 x 0.7
Weight (g): 5.7
Meteorite Type: EL3 chondrite

Macroscopic Description: Cecilia Satterwhite
Twenty percent of the exterior of this chondrite is covered with shiny, brown fusion crust. A few small light-colored and heavily weathered inclusions are visible in the dark gray to black matrix. Oxidation is heavy in areas.

Thin Section (,2) Description: Brian Mason
The section consists mostly of chondrules and chondrule fragments up to 2.1 mm across; they consist of granular or radiating pyroxene, sometimes with a little olivine. The opaque material consists largely of nickel-iron with minor sulfides. Minor weathering is indicated by brown staining and occasional limonite areas. The section is partially rimmed with fusion crust. Microprobe analyses show that most of the pyroxene is close to MgSiO3 in composition, but FeO contents up to 2.7% were recorded. The metal contains 0.7-1.1% Si. One grain of plagioclase, An9Or2, was analyzed. The meteorite is classified as an enstatite chondrite, EL3, it is similar to EET90299, and the possibility of pairing should be considered.

Data from:
  MB79
  Table 2
  Line 203:
Origin or pseudonym:Texas Bowl
Mass (g):5.7
Class:EL3
Weathering grade:C
Ferrosilite (mol%):0.2-3
Comments:90299 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 17(3) (1994), JSC, Houston
Published in Meteoritical Bulletin, no. 79, MAPS 31, A161-A174 (1996)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 16' 39"S, 156° 25' 19"E)
Note: the NHM and MetBase coordinates are 22.4 km apart

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