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Elephant Moraine 96010
Basic information Name: Elephant Moraine 96010
     This is an OFFICIAL meteorite name.
Abbreviation: EET 96010
Observed fall: No
Year found: 1996
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 16.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 21(1)  (1998)  CV3
Meteoritical Bulletin:  MB 82  (1998)  CV3
NHM Catalogue:  5th Edition  (2000)  CV3
MetBase:  v. 7.1  (2006)  C3-ung
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  CM2
Recommended:  CM2    [explanation]

This is 1 of 541 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Revised 12 Feb 2010: reclassified in AMN 33(1)
Writeuphelp
Writeup from AMN 21(1):

Sample No.:

EET96010

Location:

Elephant Moraine

Dimensions (cm):

2.5x2.5x2.0

Weight (g):

16.3

Meteorite Type:

CV3 Chondrite
EET96010 Thumbnail

Macroscopic Description: Kathleen McBride
The exterior of this carbonaceous chondrite is black with light colored chondrules. Only small patches of purplish fusion crust remain. It is pitted and has a rough texture. The matrix is black with light colored chondrules, mm in size. It is very soft and chondrules fall out easily or break. There are some areas of rust but the amount of metal seems minor.

Thin Section (,5) Description: Brian Mason
The section shows numerous chondrules and chondrule fragments, up to 3 mm across, in a black matrix. Trace amounts of nickel-iron and sulfide are present as minute grains dispersed through the matrix. Microprobe analyses show that most of the chondritic olivine is close to Mg2SiO4 in composition, with some more iron-rich grains; pyroxene composition is Fs1-3. The matrix appears to consist largely of iron-rich olivine, around Fa45.. The meteorite is a C3 chondrite of the Vigarano subtype.

EET96010 - Cross-Polarized Light EET96010 - Plane-Polarized Light
Cross-Polarized Light Plane-Polarized Light

Writeup from AMN 33(1):
EET 96010 original classification in AMN 21, no. 1 as an CV3 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] and bulk compositional data [3,4,5] indicate this meteorite is not an CV3 chondrite, but a CM2 chondrite, and one with extensive hydration like Belgica 7904.

[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.
[3] Moriarty, G. et al. (2009) Compositions of four unusual CM or CM-related Antarctic chondrites. Chemie der Erde – Geochemistry 69, 161-168.
[4] Tonui, E. et al. (2001) Petrographic and Chemical Evidence of Thermal Metamorphism in New Carbonaceous Chondrites. Meteoritics & Planetary Science, vol. 36, Supplement, p.A207.
[5] Tonui, E. et al. (2002) Petrographic, chemical and spectroscopic data on thermally metamorphosed carbonaceous chondrites (abstract #1288). 33rd Lunar and Planetary Science Conference. CD-ROM.
Data from:
  MB82
  Table A1
  Line 39:
Origin or pseudonym:Meteorite City
Mass (g):16.3
Class:CV3
Weathering grade:B
Fayalite (mol%):2-33
Ferrosilite (mol%):1-3
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 40719 approved meteorites from Antarctica (plus 4494 unapproved names)
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