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Elephant Moraine 90021
Basic information Name: Elephant Moraine 90021
     This is an OFFICIAL meteorite name.
Abbreviation: EET 90021
Observed fall: No
Year found: 1990
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 19.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(1)  (1992)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  C2
MetBase:  v. 7.1  (2006)  CM2
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  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
Writeuphelp
Writeup from AMN 15(1):

Sample No.: EET90021

Location: Elephant Moraine

Field Number: 6351

Dimensions (cm): 3.2 x 3 x 1

Weight (g): 19.6

Meteorite Type: C2 chondrite

 

Macroscopic Description: Cecilia Satterwhite

Seventy percent of the exterior of this carbonaceous chondrite is covered with fractured, black fusion crust. Cleaving this stone revealed an interior that is black in color and contains abundant light gray inclusions that are as large as 2 mm in diameter. A weathering rind is present.

 

Thin Section (,2) Description: Brian Mason

The section consists largely of black opaque matrix, with occasional chondrules up to 0.3 mm across and numerous small grains of olivine and a little pyroxene. Microprobe analyses show that most of the olivine is close to Mg2SiO4 in composition, with a few more iron-rich grains; mean composition is Fa3, with range Fa1-28 (CV FeO is 241). Pyroxene composition is Fs1-3. The meteorite is a C2 chondrite.

 

Data from:
  MB76
  Table 2
  Line 2054:
Origin or pseudonym:Texas Bowl
Mass (g):19.6
Class:C2
Weathering grade:A/B
Fayalite (mol%):1-28
Ferrosilite (mol%):1-3
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 15(1) (1992), 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° 16' 5"S, 156° 27' 22"E)
Note: the NHM and MetBase coordinates are 21.1 km apart

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