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Elephant Moraine 83260
Basic information Name: Elephant Moraine 83260
     This is an OFFICIAL meteorite name.
Abbreviation: EET 83260
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 15.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 9(2)  (1986)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.3/3.7
NHM Catalogue:  5th Edition  (2000)  L3.3/3.7
MetBase:  v. 7.1  (2006)  L3.3-3.7
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  L3.3-3.7
Recommended:  L3.3-3.7    [explanation]

This is the only approved meteorite classified as L3.3-3.7.
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 9(2):

Sample No.: EET83260

Location: Elephant Moraine

Weight (g): 15.4

Field No.: 2997

Dimensions (cm): 3 x 2 x 2

 

Meteorite Type: L3 Chondrite

Macroscopic Description: René Martinez

This specimen retains fusion crust on all sides which is iridescent and fractured in some areas. The interior is very dark gray with abundant small white inclusions. Sample is very coherent.

 

Thin Section (,3) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, with some black matrix and minor amounts of troilite and nickel-iron. The chondrules are fairly uniform in size, 0.3-1.2 mm across, and show a variety of types. Considerable weathering is indicated by areas of red-brown limonite throughout the section. Remnants of fusion crust are present. Microprobe analyses give the following compositions: olivine, Fa7-19, mean Fa17 (CV Fe022); pyroxene, Fs5-25. The variability of olivine and pyroxene compositions indicates type 3, and the amount of nickel-iron suggests L group: hence, the meteorite is tentatively classified as an L3 chondrite.

Data from:
  MB76
  Table 2
  Line 1523:
Origin or pseudonym:Main icefield
Mass (g):15.4
Class:L3.3/3.7
Weathering grade:B/C
Fayalite (mol%):7-19
Ferrosilite (mol%):5-25
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 9(2) (1986), 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° 19' 43"S, 157° 13' 23"E)
Note: the NHM and MetBase coordinates are 16.3 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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