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Lewis Cliff 88714
Basic information Name: Lewis Cliff 88714
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88714
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 22.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(1)  (1992)  E6
AMN 17(1)  (1994)  EL6
Meteoritical Bulletin:  MB 76  (1994)  EL6
NHM Catalogue:  5th Edition  (2000)  EL6
MetBase:  v. 7.1  (2006)  EL6
Recommended:  EL6    [explanation]

This is 1 of 116 approved meteorites classified as EL6.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Field number: 5654
Writeuphelp
Writeup from AMN 15(1):

Sample No.: LEW88714

Location: Lewis Cliff

Field Number: 5654

Dimensions (cm): 3.5 x 3.5 x 1

Weight (g): 22.6

Meteorite Type: E6 chondrite

 

Smooth, shiny, brown fusion crust covers one half of this meteorite. The interior matrix is fine-grained. Oxidation is heavy, giving the interior a brown color.

 

Thin Section (,2) Description: Brian Mason

Only vague traces of chondritic structure can be distinguished; the section consists largely of fine-grained pyroxene (grain size 0.06-0.3 mm), with a moderate amount of nickel-iron and minor troilite. Trace amounts of a colorless highly birefringent mineral, probably sinoite, were noted. Weathering is extensive, with brown limonitic staining throughout the section. Microprobe analyses show the pyroxene is almost pure MgSiO3 (FeO 0.1-0.4%, CaO 0.5-0.6%); a little plagioclase, An13, was found. The nickel-iron contains about 1.5% Si. The meteorite is an E6 chondrite; it is closely similar to LEW87119 and LEW88135, with which it may be paired. The other LEW E6 chondrite, 88180, is distinctly different, and almost unweathered.

 

Data from:
  MB76
  Table 2
  Line 4554:
Origin or pseudonym:Upper Ice Tongue
Mass (g):22.6
Class:EL6
Weathering grade:C
Fayalite (mol%):¾
Ferrosilite (mol%):0.1-.6
Comments:88135 pairing group
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' 28"S, 161° 21' 19"E)
Note: the NHM and MetBase coordinates are 3.2 km apart

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