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Lewis Cliff 88644
Basic information Name: Lewis Cliff 88644
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88644
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 15.9 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.5
NHM Catalogue:  5th Edition  (2000)  L3.5
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: 6196
Writeuphelp
Writeup from AMN 14(2):

Sample No.: LEW88644

Location: Lewis Cliff

Field Number: 6196

Dimensions (cm): 3.3 x 1.7 x 1.8

Weight (g): 15.9

Meteorite Type: L3 chondrite

 

Macroscopic Description: Robbie Marlow

Dull, black, frothy fusion crust almost completely covers this unequilibrated chondrite. The interior is medium gray in color with oxidation scattered throughout. Many millimeter-sized chondrules are present.

 

Thin Section (.21 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 with minor amounts of nickel-iron and troilite. Some weathering is indicated by brown limonitic staining around metal grains. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa3-30, mean Fa17 (CV FeO is 43); pyroxene, Fs2-26. The variability of olivine and pyroxene compositions indicates type 3, and the amount of nickel-iron L group, hence the meteorite is classified as an L3 chondrite (estimated L3.5).

 

Data from:
  MB76
  Table 2
  Line 4484:
Origin or pseudonym:Upper Ice Tongue
Mass (g):15.9
Class:L3.5
Weathering grade:A/B
Fayalite (mol%):3-30
Ferrosilite (mol%):2-26
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° 17' 37"S, 161° 19' 45"E)
Note: the NHM and MetBase coordinates are 3 km apart

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