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Lewis Cliff 88146
Basic information Name: Lewis Cliff 88146
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88146
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 13(3)  (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: 4476
Writeuphelp
Writeup from AMN 13(3):

Sample No. LEW88146

Location: Lewis Cliff

Dimensions (cm): 1.5 x 1.4 x 1.0

Field Number: 4476

Weight (g): 5.0

Meteorite Type: L3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

Thirty percent of this meteorite fragment is covered with black fusion crust. Areas devoid of fusion crust are yellowish-green in color. The interior shows two distinct lithologies with a sharp contact between them, each making up 50% of the exposed interior. One lithology has light to medium gray matrix with abundant dark chondrules/inclusions. The other lithology has dark gray matrix with abundant light chondrules/inclusions.

 

Thin Section (,2) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.9 mm across; some of the chondrules are rimmed with granules of nickel-iron and troilite. The matrix is fine-grained olivine and pyroxene, with a minor amount of nickel-iron and troilite. The meteorite is almost unweathered. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa14-28 mean Fa22 (CV FeO is 35); pyroxene, Fs8-21. The amount of nickel-iron indicates L group, and the variability of olivine and pyroxene compositions type 3. Hence the meteorite is classified as an L3 chondrite (estimated L3.6).

 

Data from:
  MB76
  Table 2
  Line 4002:
Origin or pseudonym:Lower Ice Tongue
Mass (g):5
Class:L3.6
Weathering grade:A/B
Fayalite (mol%):14-28
Ferrosilite (mol%):6-21
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 13(3) (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° 14' 43"S, 161° 24' 44"E)
Note: the NHM and MetBase coordinates are 5.6 km apart

Statistics:
     This is 1 of 38940 approved meteorites from Antarctica (plus 5051 unapproved names)
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