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Elephant Moraine 90628
Basic information Name: Elephant Moraine 90628
     This is an OFFICIAL meteorite name.
Abbreviation: EET 90628
Observed fall: No
Year found: 1990
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 23.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(2)  (1992)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.5
NHM Catalogue:  5th Edition  (2000)  L3.5
MetBase:  v. 7.1  (2006)  L3.4
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  L3.4
Recommended:  L3.4    [explanation]

This is 1 of 51 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 15(2):

Sample No.: EET90628

Location: Elephant Moraine

Field Number: 7182

Dimensions (cm): 2.5 x 2 x 1.5

Weight (g): 23.0

Meteorite Type: L3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

The exterior surface of this chondrite is covered with shiny fractured black fusion crust. A bluish colored evaporite deposit is pervasive. The interior is chock-full of inclusions/chondrules. Most of the chondrules have well-defined edges. A 3 mm sized clast was noted. Matrix is dark gray.

 

Thin Section (,2) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.4 mm across, in a dark matrix containing small mineral grains and a little nickel-iron and troilite. Minor weathering is indicated by some brown limonitic staining, mostly in association with the metal grains. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-20, mean Fa11 (CV FeO is 48); pyroxene, Fs1-19. The variability of olivine and pyroxene compositions indicates type 3, and the small amount of nickel-iron L group, hence the meteorite is classified as an L3 chondrite (estimated L3.5).

 

Data from:
  MB76
  Table 2
  Line 2645:
Origin or pseudonym:Texas Bowl
Mass (g):23.1
Class:L3.5
Weathering grade:A/Be
Fayalite (mol%):1-20
Ferrosilite (mol%):1-19
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 15(2) (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° 17' 37"S, 156° 21' 38"E)
Note: the NHM and MetBase coordinates are 24.7 km apart

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