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Lewis Cliff 88477
Basic information Name: Lewis Cliff 88477
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88477
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(1)  (1991)  LL3
Meteoritical Bulletin:  MB 76  (1994)  LL3.4
NHM Catalogue:  5th Edition  (2000)  LL3.4
MetBase:  v. 7.1  (2006)  LL3.4
Recommended:  LL3.4    [explanation]

This is 1 of 24 approved meteorites classified as LL3.4.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 5281
Writeuphelp
Writeup from AMN 14(1):

Sample No: LEW88477

Location: Lewis Cliff

Field Number: 5281

Dimensions (cm): 3 x 1.9 x 1.1

Weight (g): 12.3

Meteorite Type LL3 Chondrite

 

Macroscopic Description; Robbie Marlow

Dark brown fusion crust almost completely covers this meteorite. Heavy oxidation obscures any features that are present in the interior matrix.

 

Thin Section (,1) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.4 mm across, surrounded by a small amount of black opaque matrix which contains a little troilite and nickel-iron. Minor weathering is indicated by patchy brown limonite in the matrix. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa4-20, mean Fa14 (CV FeO is 54); pyroxene, Fs4-20. The very small amount of nickel-iron suggests UL group, and the variability of olivine and pyroxene compositions type 3, hence the meteorite is classified as an LL3 chondrite (estimated LL3.4).

 

Data from:
  MB76
  Table 2
  Line 4324:
Origin or pseudonym:Lower Ice Tongue
Mass (g):12.3
Class:LL3.4
Weathering grade:C
Fayalite (mol%):4-20
Ferrosilite (mol%):4-20
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 14(1) (1991), 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° 14' 58"S, 161° 24' 26"E)
Note: the NHM and MetBase coordinates are 5.2 km apart

Statistics:
     This is 1 of 38937 approved meteorites from Antarctica (plus 5051 unapproved names)
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