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Lewis Cliff 87232
Basic information Name: Lewis Cliff 87232
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 87232
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 23.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(2)  (1992)  CR2
AMN 17(1)  (1994)  Kakangari-like
Meteoritical Bulletin:  MB 76  (1994)  Kakangari-like
NHM Catalogue:  5th Edition  (2000)  K
MetBase:  v. 7.1  (2006)  K2
Recommended:  K    [explanation]

This is the only approved meteorite classified as K.
Search for other: Kakangari chondrites, Ungrouped chondrites
Comments: Field number: 4796
Writeuphelp
Writeup from AMN 15(2):

Sample No.: LEW87232

Location: Lewis Cliff

Field Number: 4796

Dimensions (cm): 3.0 x 2.5 x 2.0

Weight (g): 23.1

Meteorite Type: C2R chondrite

 

Macroscopic Description: Carol Schwarz

LEW87232 is a rounded stone with small patches of fusion crust remaining on one side. This specimen appears to be more weathered at the very center than on the exterior. The matrix is yellowish. Some metal was noted.

 

Thin Section (,2) Description: Brian Mason,

The section shows numerous chondrules (up to 1.8 mm across), chondrule fragments, and mineral grains in a translucent brown matrix. Chondrules are mainly granular or porphyritic olivine and olivine-pyroxene. Minor amounts of nickel-iron and a little sulfide are present as small grains scattered through the matrix or sometimes concentrated on chondrule rims. Many of the metal grains are rimmed with brown limonite. The matrix appears to consist largely of phyllosilicates. Microprobe analyses show the olivine is close to Mg2SiO4 in composition (Fa0.6-2, mean Fa1.0, CV FeO = 56); pyroxene is enstatite or clinoenstatite, Fs0.5-9. One small xenocryst of plagioclase, An19, was analyzed. The meteorite is tentatively classified as a C2 chondrite of the Renazzo subtype.

 

Data from:
  MB76
  Table 2
  Line 3797:
Origin or pseudonym:South Lewis Cliff
Mass (g):23.1
Class:"Kak"
Weathering grade:B
Fayalite (mol%):0.6-2
Ferrosilite (mol%):0.5-9
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 15(2) (1992), 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° 20' 31"S, 161° 23' 35"E)
Note: the NHM and MetBase coordinates are 7.4 km apart

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