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Elephant Moraine 83254
Basic information Name: Elephant Moraine 83254
     This is an OFFICIAL meteorite name.
Abbreviation: EET 83254
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 7.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 10(2)  (1987)  E4
Meteoritical Bulletin:  MB 76  (1994)  EH3
NHM Catalogue:  5th Edition  (2000)  EH3
MetBase:  v. 7.1  (2006)  EH3
Recommended:  EH3    [explanation]

This is 1 of 137 approved meteorites classified as EH3.   [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites
Writeuphelp
Writeup from AMN 10(2):

Sample No.: EET83254

Location: Elephant Moraine

Weight (g): 7.7

Field No.: 1340

Dimensions (cm): 2 x 2 x 1.5

Meteorite Type: E4 Chondrite

 

Macroscopic Description: Carol Schwarz

EET83254 is an angular fragment that is very shiny and iridescent with a small patch of fusion crust remaining. The interior is dark brown with a small amount of evaporite deposit present.

 

Thin Section (,2) Description: Brian Mason

Chondrules and chondrule fragments are abundant, and are set in a granular groundmass of pyroxene, nickel-iron, and sulfides. The chondrules range up to 0.6 mm across (a few fragments are larger), and consist of granular or prismatic pyroxene (small olivine grains are present in a few chondrules). Brown limonitic staining pervades the section. Microprobe analyses show that most of the pyroxene is close to MgSiO3 in composition, with FeO less than 1%, but a few grains show higher FeO content, up to 6.4%. The nickel-iron contains 2.6% Si. Since much of the pyroxene is polysynthetically twinned clinoenstatite, the meteorite is classed as an E4 chondrite. It is similar to EET83307 and EET83322, and the possibility of pairing should be considered.

Data from:
  MB76
  Table 2
  Line 1517:
Origin or pseudonym:Main icefield
Mass (g):7.7
Class:EH3
Weathering grade:Ce
Ferrosilite (mol%):0-9
Comments:83307 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 10(2) (1987), 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° 17' 46"S, 157° 14' 13"E)
Note: the NHM and MetBase coordinates are 12.7 km apart

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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