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Lewis Cliff 88564
Basic information Name: Lewis Cliff 88564
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88564
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 6.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(1)  (1992)  LL6
Meteoritical Bulletin:  MB 76  (1994)  LL6
NHM Catalogue:  5th Edition  (2000)  LL6
MetBase:  v. 7.1  (2006)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2754 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Field number: 4531
Writeuphelp
Writeup from AMN 15(1):

Sample No.: LEW88564; 88586; 88606

Location: Lewis Cliff

Field Number: 4531; 5308; 5565

Dimensions (cm): 1.7 x 1.5 x 1; 1.9 x 1.4 x 1.0; 1.4 x 1.2 x 1.0

Weight (g): 6.5; 6.4; 2.7

Meteorite Type: LL6 chondrite

 

Macroscopic Description: Cecilia Satterwhite and Bobbie Marlow

Thin black to brown fusion crust covers approximately half of each of these specimens. Each meteorite shows a brecciated interior with dark matrix surrounding areas of light matrix. Oxidation is moderate to heavy in areas.

 

Thin Section (LEW88564,1: 88586,2: 88606,2) Description: Brian Mason

These meteorites are very similar in texture and mineral compositions and are probably paired. The sections show a cataclastic texture, with individual clasts up to 4 mm across. Olivine is the principal mineral, with a lesser amount of pyroxene and minor plagioclase. The sections are dark gray from finely disseminated troilite, much of it as coatings on silicate grain boundaries. Trace amounts of nickel-iron are present. The silicates are generally fine-grained, 0.02-0.05 mm, apparently by shock comminution of larger grains. Vague traces of chondritic structure were noted. The larger clasts, most abundant in 88586, are coarser-grained and lack the disseminated sulfide. Mineral compositions are slightly variable, the means being: olivine, Fa30; pyroxene, Fs24; plagioclase, An10. The meteorites are tentatively identified as LL6 chondrites, but further research is indicated.

 

Data from:
  MB76
  Table 2
  Line 4407:
Mass (g):6.5
Class:LL6
Weathering grade:C
Fayalite (mol%):30
Ferrosilite (mol%):24
Catalogs:
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Search for this meteorite in the NASA/JSC database (U.S.):   
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::   Unknown

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

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