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Lewis Cliff 86014
Basic information Name: Lewis Cliff 86014
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 86014
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 662 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 11(1)  (1988)  L4
Meteoritical Bulletin:  MB 76  (1994)  L4
NHM Catalogue:  5th Edition  (2000)  L4
MetBase:  v. 7.1  (2006)  L4
Recommended:  L4    [explanation]

This is 1 of 1652 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Field number: 3252
Writeuphelp
Writeup from AMN 11(1):

Sample No.: LEW86014

Location: Lewis Cliff

Weight (g): 662.4

Field No.: 3252

Dimensions (cm): 13.5x9.5x4

Meteorite Type: 1.4 Chondrite

 

Macroscopic Description: Roberta Score,

This flat chondrite fragment has thin fusion crust on 50% of its exterior surface. The areas devoid of fusion crust are red-brown in color. A few chondrules are discernable in the extensively weathered interior. This stone was extremely difficult to break despite its flat shape!

 

Thin Section (,4) Description: Brian Mason

Most of the section consists of a close-packed aggregate of chondrules with minor amounts of nickel-iron and troilite, but it contains an elliptical polycrystalline inclusion (5x3 mm) made up of polysynthetically twinned clinopyroxene, olivine, minor plagioclase, and one large grain of merrillite. Chondrules range up to 1.5 mm across, and show a variety of types: granular and porphyritic olivine and olivine-pyroxene, barred olivine, and cryptocrystalline pyroxene. Microprobe analyses of the chondritic portion give the following compositions: olivine, Fa24; pyroxene, Fs17-22 Compositions in the inclusion are olivine, Fa23; pyroxene, Fs17; plagioclase, An81. The meteorite is an L4 chondrite.

Data from:
  MB76
  Table 2
  Line 3057:
Origin or pseudonym:Lower Ice Tongue
Mass (g):662.4
Class:L4
Weathering grade:C
Fayalite (mol%):24
Ferrosilite (mol%):17-22
Comments:NTL=93±2
Catalogs:
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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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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 15' 25"S, 161° 20' 43"E)
Note: the NHM and MetBase coordinates are 4.1 km apart

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