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Lewis Cliff 87093
Basic information Name: Lewis Cliff 87093
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 87093
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(1)  (1992)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.8
NHM Catalogue:  5th Edition  (2000)  L3.8
MetBase:  v. 7.1  (2006)  L3
Recommended:  L3.8    [explanation]

This is 1 of 68 approved meteorites classified as L3.8.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 4206
Writeuphelp
Writeup from AMN 15(1):

Sample No.: LEW87093

Location: Lewis Cliff

Field Number: 4206

Dimensions (cm): 2.5 x 1.5 x 1

Weight (g): 7.0

Meteorite Type: L3 chondrite

 

Macroscopic Description: Cecilia Satterwhite LEW87093 is extremely weathered. Some reddish-brown crust remains and no features can be seen through the reddish brown oxidation.

 

Thin Section (,2) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.1 mm across, in a matrix of fine-grained olivine and pyroxene and a little nickel-iron and troilite. Weathering is extensive, with limonitic staining and areas of brown limonite throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa11-21, mean Fa17 (CV FeO is 19); pyroxene, Fs4-30. The variability of olivine and pyroxene compositions suggests type 3, and the amount of nickel-iron indicates L group, hence the meteorite is classified as an L3 chondrite (estimated L3.8).

 

Data from:
  MB76
  Table 2
  Line 3669:
Origin or pseudonym:Lower Ice Tongue
Mass (g):7
Class:L3.8
Weathering grade:C
Fayalite (mol%):11-21
Ferrosilite (mol%):4-30
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:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 15' 12"S, 161° 24' 38"E)
Note: the NHM and MetBase coordinates are 5 km apart

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