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Elephant Moraine 96026
Basic information Name: Elephant Moraine 96026
     This is an OFFICIAL meteorite name.
Abbreviation: EET 96026
Observed fall: No
Year found: 1996
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 226 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 21(1)  (1998)  R
Meteoritical Bulletin:  MB 82  (1998)  R
NHM Catalogue:  5th Edition  (2000)  R
MetBase:  v. 7.1  (2006)  C4-5
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  CV3 reduced
Recommended:  C4/5    [explanation]

This is the only approved meteorite classified as C4/5.
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated)
Comments: Revised 30 May 2009: Changed to C4/5 from C4-5: Tonui et al. 2001
Writeuphelp
Writeup from AMN 21(1):

Sample No.:

EET96026

Location:

Elephant Morraine

Dimensions (cm):

5.0x4.0x5.5

Weight (g):

225.997

Meteorite Type:

R3 Chondrite

EET96026 Thumbnail

Macroscopic Description: Kathleen McBride
The exterior is smooth and greenish-black in color with small, light colored inclusions visible. Only a thin, black fusion crust remains in a small area. The interior of this meteorite is dark gray with dark, angular, black clasts. Some lighter colored inclusions are present. The matrix is dull and very fine grained.

Thin Section (,2) Description: Tim McCoy
EET96026 - Cross-Polarized Light The meteorite consists of chondrules (0.5-1 mm diameter), mineral grains and fragments, and a chondritic clast (3 mm across) in a fine-grained silicate matrix. Minor, fine-grained Fe,Ti-oxides and sulfides occur scattered throughout the meteorite. Weathering is minor. Olivine compositions exhibit a broad range (Fa3-39), with most grains Fa30-39. Low-Ca pyroxene ranges from Fs5-19. The meteorite is an R3 chondrite (estimated subtype 3.6) and is similar to PCA 91002 (1994, Meteoritics 29, 255).


Writeup from AMN 33(1):
EET 96026 original classification in AMN 21 no. 1, as an R chondrite, but several studies have brought information to light that is inconsistent with that classification. Oxygen isotope data [1], as well as magnetic susceptibility data [2] indicate this meteorite is not an R chondrite, but a CV3 chondrite.

[1] Clayton R. N. and Mayeda T. K. 2003. Oxygen isotopes in carbonaceous chondrites (abstract). International Symposium on the Evolution of Solar System Materials: A New perspective from Antarctic Meteorites. National Institute of Polar Research, Tokyo, Japan, 13-14.
[2] Rochette et al., 2008 Magnetic classification of stony meteorites: 2. Non-ordinary chondrites. Meteoritics & Planetary Science 43, 959–980.
Data from:
  MB82
  Table A1
  Line 54:
Origin or pseudonym:Meteorite City
Mass (g):226
Class:R
Weathering grade:B
Fayalite (mol%):3-39
Ferrosilite (mol%):5-19
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 21(1) (1998), JSC, Houston
Published in Antarctic Meteorite Newsletter 33(1) (2010), JSC, Houston
Published in Meteoritical Bulletin, no. 82, MAPS 33, A221-A240 (1998)
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Photos:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
Dr Carlton Allen, JSC-KT, NASA      
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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