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Lewis Cliff 88520
Basic information Name: Lewis Cliff 88520
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88520
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 3.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  LL3
Meteoritical Bulletin:  MB 76  (1994)  LL3.5
NHM Catalogue:  5th Edition  (2000)  LL3.5
MetBase:  v. 7.1  (2006)  L3.5
Recommended:  L3.5    [explanation]

This is 1 of 95 approved meteorites classified as L3.5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 5383
Writeuphelp
Writeup from AMN 14(2):

Sample No.: LEW88520

Location: Lewis Cliff

Field Number: 5383

Dimensions (cm): 1.9 x 1.2 x 1

Weight (g): 3.1

Meteorite Type: L3 chondrite

 

Macroscopic Description: Robbie Marlow

Dark brown fusion crust covers almost half of this weathered meteorite. Although the interior is extremely weathered, some millimeter sized inclusions/chondrules are visible.

 

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 matrix of fine-grained olivine and pyroxene and a little nickel-iron and troilite. Brown limonitic staining pervades the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa4-24, mean Fa14 (CV FeO is 41); pyroxene, Fs2-17. The variability of olivine and pyroxene compositions indicated type 3, and the amount of nickel-iron suggests L group, hence the meteorite is classified as an L3 chondrite (estimated L3.5).

 

Data from:
  MB76
  Table 2
  Line 4366:
Origin or pseudonym:Lower Ice Tongue
Mass (g):3.1
Class:LL3.5
Weathering grade:C
Fayalite (mol%):4-24
Ferrosilite (mol%):2-17
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 14(2) (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° 15' 2"S, 161° 24' 11"E)
Note: the NHM and MetBase coordinates are 5.1 km apart

Statistics:
     This is 1 of 40744 approved meteorites from Antarctica (plus 4494 unapproved names)
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