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Elephant Moraine 83224
Basic information Name: Elephant Moraine 83224
     This is an OFFICIAL meteorite name.
Abbreviation: EET 83224
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 8.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 8(1)  (1985)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CM2
Recommended:  CM2    [explanation]

This is 1 of 539 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeuphelp
Writeup from AMN 8(1):

Sample No.: EET83224

Location: Elephant Moraine

Weight (g): 8.6

Field No.: 2785

Dimensions (cm): 2.5 x 2.5 x 1.5

Meteorite Type: C2 Chondrite

 

Macroscopic Description: Roberta Score

One quarter of EET83224 is covered by dull fractured fusion crust. The exterior surfaces range in color from black to brown. Chondrules are present in the black matrix as are many small irregular shaped white inclusions.

 

Thin Section (,3) Description: Brian Mason

The thin section shows a few chondrules up to 0.8-mm in diameter, consisting of granular olivine sometimes together with minor polysynthetically twinned clinopyroxene. Scattered through the opaque to translucent brown to black matrix are numerous irregular enclaves (possibly chondrule fragments) and small (0.1 mm or less) colorless birefringent grains, mostly olivine. Accessory nickel-iron and trace amounts of sulfide are dispersed throughout the section as minute grains. Microprobe analyses give the following compositions: olivine, Fa0.2 - Fa41, mean Fa8; pyroxene is generally near clinoenstatite in composition (FeO 0.4-1.0%). The meteorite is a C2 chondrite.

Data from:
  MB76
  Table 2
  Line 1489:
Origin or pseudonym:Main icefield
Mass (g):8.6
Class:C2
Weathering grade:A/B
Fayalite (mol%):0.2-41
Ferrosilite (mol%):0-1
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 8(1) (1985), 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° 18' 44"S, 157° 23' 43"E)
Note: the NHM and MetBase coordinates are 15.6 km apart

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