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Lewis Cliff 88679
Basic information Name: Lewis Cliff 88679
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88679
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 7.9 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(1)  (1992)  Diogenite
Meteoritical Bulletin:  MB 76  (1994)  Diogenite
NHM Catalogue:  5th Edition  (2000)  Diogenite
MetBase:  v. 7.1  (2006)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 481 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Field number: 6187
Writeuphelp
Writeup from AMN 15(1):

Sample No: LEW88679

Location: Lewis Cliff

Field Number : 6187

Dimensions (cm): 1.8 x 1.5 x 1.2

Weight (g): 7.9

Meteorite Type: Diogenite

 

Macroscopic Description: Cecilia Satterwhite

Thin shiny fusion crust covers most of LEW88679. Areas of light brown oxidation scattered throughout the gray matrix give the interior a mottled appearance. Single crystals of pyroxene were noted.

 

Thin Section (,2) Description: Brian Mason

The section consists almost entirely of anhedral grains of pyroxene, up to 6 mm across; under crossed polars they show undulose extinction. Accessory amounts of isotropic plagioclase (maskelynite?) are present, as rounded grains 0.1-0.6 mm across; one grain of olivine was seen. Microprobe analyses show that the pyroxene has a fairly uniform composition, mean Wo3Fs26, With CaO 1.4-2.0%, Al2O3 0.9-1,1%- Plagioclase composition is An92; olivine composition is Fa30. The meteorite is a diogenite. It lacks the cataclastic texture of the other LEW diogenites (88008 and 88011).

 

Data from:
  MB76
  Table 2
  Line 4519:
Origin or pseudonym:Upper Ice Tongue
Mass (g):7.9
Class:Diog
Weathering grade:B/C
Fayalite (mol%):30
Ferrosilite (mol%):26
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 15(1) (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° 16' 33"S, 161° 24' 25"E)
Note: the NHM and MetBase coordinates are 3.7 km apart

Statistics:
     This is 1 of 41908 approved meteorites from Antarctica (plus 3802 unapproved names)
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