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Lewis Cliff 86220
Basic information Name: Lewis Cliff 86220
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 86220
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 25 g
Antarctic Meteorite Newsletter:  AMN 11(1)  (1988)  Iron
AMN 13(1)  (1990)  Iron w/silicate inclusions
AMN 17(1)  (1994)  Acapulcoite/Lodranite
Meteoritical Bulletin:  MB 76  (1994)  Acapulcoite/Lodranite
NHM Catalogue:  5th Edition  (2000)  Acapulcoite
MetBase:  v. 7.1  (2006)  Acapulcoite/Lodranite
Recommended:  Acapulcoite/Lodranite    [explanation]

This is 1 of 11 approved meteorites classified as Acapulcoite/Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Primitive achondrites
Comments: Field number: 2368
Writeup from AMN 11(1):

Sample No.: LEW86220

Location: Lewis Cliff

Weight (g): 25.0

Field No.: 2368

Dimensions (cm): 4x1lx1.5

Meteorite Type: Iron with silicate inclusions


Macroscopic Description: René Martinez

This elongated pebble is covered with black fusion crust and at first inspection is inconspicuous. The interior however, is crystalline with what appears to be coarse-grained silicate minerals, some green, some yellow--all of these stained by oxidation. The string-like texture of the metal gives this specimen an unusual look.


Thin Section (,2) Description: Brian Mason

The meteorite consists dominantly of nickel-iron with lesser amounts of silicates, as a granular aggregate with most grains in the 0.3-1.2 mm range. The silicates are olivine and pyroxene with minor plagioclase. The section is veined with brown limonite. Microprobe analyses give the following compositions: olivine, Fa7; pyroxene, Wo2Fs9; plagioclase, An15; one grain of diopside, Wo43Fs4, was analysed. The meteorite is an iron with silicate inclusions.

Data from:
  Table 2
  Line 3259:
Origin or pseudonym:Lower Ice Tongue
Mass (g):25
Fayalite (mol%):7
Ferrosilite (mol%):9
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References: Published in Antarctic Meteorite Newsletter 11(1) (1988), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 15' 16"S, 161° 20' 56"E)
Note: the NHM and MetBase coordinates are 4.4 km apart

     This is 1 of 43699 approved meteorites from Antarctica (plus 3802 unapproved names)
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