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Elephant Moraine 87746
Basic information Name: Elephant Moraine 87746
     This is an OFFICIAL meteorite name.
Abbreviation: EET 87746
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 142.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 12(3)  (1989)  E4
AMN 17(1)  (1994)  EH3
Meteoritical Bulletin:  MB 76  (1994)  EH3
NHM Catalogue:  5th Edition  (2000)  EH3
MetBase:  v. 7.1  (2006)  EH4
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  EH4
Recommended:  EH4    [explanation]

This is 1 of 20 approved meteorites classified as EH4.   [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Writeuphelp
Writeup from AMN 12(3):

Sample No.: EET87746

Location: Elephant Moraine

Dimensions (cm): 4x4x3.5

Field Number: 4587

Weight (g): 142.3

Meteorite Type: E4 chondrite

 

Macroscopic Description: Carol Schwarz

EET87746 is extremely weathered although black fusion crust still covers ~60% of the exterior. Areas devoid of fusion crust are polished. Deep fractures penetrate the interior of the stone. The exposed interior is extremely oxidized. Some evaporite minerals were noted.

 

Thin Section (,3) Description: Brian Mason

The section shows abundant chondrules, chondrule fragments, and mineral grains in an opaque matrix consisting largely of nickel-iron and sulfides; the metal grains are extensively weathered to limonite. Chondrules are usually small, averaging 0.6 mm across, but a few larger ones, up to 1.5 mm across, are present. The chondrules and mineral grains are mostly clinoenstatite, but a little olivine is present. Mineral compositions are somewhat variable: olivine, Fa1-2; pyroxene, Fs0.6-2, averaging Fs1.2: the nickel-iron contains 2.0% Si. The meteorite is classified as an E4 chondrite.

Data from:
  MB76
  Table 2
  Line 1919:
Origin or pseudonym:Meteorite City
Mass (g):142.3
Class:EH3
Weathering grade:Ce
Fayalite (mol%):1-2
Ferrosilite (mol%):0.6-2
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 12(3) (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 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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