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Lewis Cliff 87051
Basic information Name: Lewis Cliff 87051
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 87051
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 0.6 g
Antarctic Meteorite Newsletter:  AMN 13(1)  (1990)  Angrite
Meteoritical Bulletin:  MB 76  (1994)  Angrite
NHM Catalogue:  5th Edition  (2000)  Angrite
MetBase:  v. 7.1  (2006)  Angrite
Recommended:  Angrite    [explanation]

This is 1 of 38 approved meteorites classified as Angrite.   [show all]
Search for other: Achondrites, Angrites
Comments: Field number: 4058
Writeup from AMN 12(1):

Sample No.: LEW87051

Location: Lewis Cliff

Weight(g): 0.6

Field No.: 4058

Dimensions (cm): 1 x 0.7 x 0.5

Meteorite Type: Angrite


Macroscopic Description; Rene, Martinet

This tiny achondrite is completely covered with black fusion crust. The interior is very fresh looking, fine-grained, and crystalline.


Thin Section (,3) Description: Brian Mason

The section consists of subequal amounts of olivine, pyroxene, and plagioclase, with a little opaque material, probably titanomagnetite. The texture is dominated by a subparallel arrangement of plagioclase laths, 0.02 mm wide and up to 0.3 mm long. The pyroxene is weakly pleochroic with a purplish tint. Microprobe analyses give the following compositions: plagioclase, An100 (K2O, Na2O both less than 0.1%); olivine, somewhat variable, averaging Fa19 with 0.7% CaO (one spot gave a kirschsteinite analysis, Ca38Fe80Mg2); the pyroxene is a titanian fassaite, averaging Wo47Fs33 with up to 8.5% Al2O3 and 4.6% TiO2. The meteorite is an angrite, but is texturally distinct from the other angrites, Angra dos Reis and LEW86010.

Data from:
  Table 2
  Line 3628:
Origin or pseudonym:South Lewis Cliff
Mass (g):0.6
Weathering grade:A
Fayalite (mol%):19
Ferrosilite (mol%):33
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References: Published in Antarctic Meteorite Newsletter 12(1) (1989), 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° 20' 53"S, 161° 28' 57"E)
Note: the NHM and MetBase coordinates are 8.5 km apart

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