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Elephant Moraine 87860
Basic information Name: Elephant Moraine 87860
     This is an OFFICIAL meteorite name.
Abbreviation: EET 87860
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 32.8 g
Antarctic Meteorite Newsletter:  AMN 11(2)  (1988)  C5
AMN 17(1)  (1994)  CK5-6
Meteoritical Bulletin:  MB 76  (1994)  CK5-6
NHM Catalogue:  5th Edition  (2000)  CK5-6
MetBase:  v. 7.1  (2006)  CK5/6
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CK5/6
Recommended:  CK5/6    [explanation]

This is 1 of 6 approved meteorites classified as CK5/6.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Writeup from AMN 11(2):

Sample No.: EET87860

Location: Elephant Moraine

Weight (g): 32.8

Field No.: 2261

Dimensions (cm): 3 x 2 x 1.5

Meteorite Type: C5 Chondrite


Macroscopic Description: René Martinez

This specimen is light gray and very fine-grained with three principal minerals: a mafic mineral, white plagioclase and sulfide (~5-10%). About 40% of the pebble is covered with fusion crust. No chondrules were visible.


Thin Section (,3) Description: Brian Mason

The section shows an aggregate of anhedral olivine grains (0.3-0.6 mm across) and minor plagioclase, with a small amount of finely dispersed opaque material (magnetite and pentlandite). Chondrules, if present, are almost completely integrated with the matrix. Olivine composition is Fa28; pyroxene was not detected; plagioclase composition is quite variable, An21-72. The mineralogy is similar to that of EET87526 and other C4 chondrites, but the texture is much coarser, and the meteorite is tentatively classified as a C5 chondrite.

Data from:
  Table 2
  Line 2033:
Origin or pseudonym:Texas Bowl
Mass (g):32.8
Weathering grade:A/B
Fayalite (mol%):28
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References: Published in Antarctic Meteorite Newsletter 11(2) (1988), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 16' 57"S, 156° 29' 19"E)
Note: the NHM and MetBase coordinates are 21.1 km apart

     This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names)
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