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Lewis Cliff 85452
Basic information Name: Lewis Cliff 85452
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 85452
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 9.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 13(2)  (1990)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.6
NHM Catalogue:  5th Edition  (2000)  L3.6
MetBase:  v. 7.1  (2006)  L3.6
Recommended:  L3.6    [explanation]

This is 1 of 57 approved meteorites classified as L3.6.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 3140
Writeuphelp
Writeup from AMN 13(2):

Sample No. LEW85452

Location: Lewis Cliff

Dimensions (cm): 2x1.5x0.5

Field Number: 3140

Weight (g): 9.2

Meteorite Type: L3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

Black fusion crust completely covers LEW85452. The interior structure has been obliterated by oxidation.

 

Thin Section (,3) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.4 mm across, in a finely granular matrix containing some troilite and nickel-iron. Chondrule types include granular and porphyritic olivine and olivine-pyroxene, and fine-grained to cryptocrystalline pyroxene. Olivine and pyroxene show a wide range in composition: olivine, Fa5-23, mean Fa15 (CV FeO is 35); pyroxene, Fs2-18. This range of compositions indicates type 3, and the small amount of nickel-iron suggests L group; the meteorite is therefore classed as an L3 chondrite (estimated L3.6).

 

Data from:
  MB76
  Table 2
  Line 3023:
Origin or pseudonym:Upper Ice Tongue
Mass (g):9.2
Class:L3.6
Weathering grade:C
Fayalite (mol%):5-23
Ferrosilite (mol%):2-18
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 13(2) (1990), 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° 16' 37"S, 161° 22' 33"E)
Note: the NHM and MetBase coordinates are 3.3 km apart

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