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Lewis Cliff 86001
Basic information Name: Lewis Cliff 86001
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 86001
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 291 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 10(2)  (1987)  Eucrite
AMN 17(1)  (1994)  Eucrite-pmict
Meteoritical Bulletin:  MB 76  (1994)  Eucrite-pmict
NHM Catalogue:  5th Edition  (2000)  Eucrite-pmict
MetBase:  v. 7.1  (2006)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 339 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Field number: 4966
Writeuphelp
Writeup from AMN 10(2):

Sample No.: LEW86001

Location: Lewis Cliff

Weight (g): 290.6

Field No.: 4966

Dimensions (cm): 8.5 x 5 x 4

Meteorite Type: Eucrite

 

Macroscopic Description: Roberta Score

Dull black fusion crust covers 80% of LEW86001. Large vugs, typical of all Antarctic eucrites, are abundant. Exterior surfaces without fusion crust have a dirty gray color and show some small inclusions. Some oxidation is present. The interior is lighter gray in color and has areas of heavy oxidation. Numerous clasts some as large as 0.5 cm are present.

 

Thin Section (,6) Description: Brian Mason

The section shows a groundmass of comminuted pyroxene and plagioclase (grains up to 0.5 mm), with numerous clasts up to 3 mm across. The clasts consist of pyroxene and plagioclase, with a variety of textures from fine-grained granular to ophitic to gabbroic. A small amount of opaques is present. Microprobe analyses show pyroxene compositions clustered around Wo2Fs56 but ranging to Wo44Fs22, with fairly uniform En content. Plagioclase compositions are An76-88. The meteorite is a eucrite.

Data from:
  MB76
  Table 2
  Line 3044:
Origin or pseudonym:Lower Ice Tongue
Mass (g):290.6
Class:Eu "pm"
Weathering grade:Be
Ferrosilite (mol%):22-57
Comments:NTL=28±4
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 10(2) (1987), 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° 15' 17"S, 161° 23' 57"E)
Note: the NHM and MetBase coordinates are 4.8 km apart

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