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Lewis Cliff 85339
Basic information Name: Lewis Cliff 85339
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 85339
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 28.8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 12(3)  (1989)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.4
NHM Catalogue:  5th Edition  (2000)  L3.4
MetBase:  v. 7.1  (2006)  L3.4
Recommended:  L3.4    [explanation]

This is 1 of 51 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 2077
Writeuphelp
Writeup from AMN 12(3):

Sample No.: LEW85339

Location: Lewis Cliff

Dimensions (cm): 3.5x3x2

Field Number: 2077

Weight (g): 28.8

Meteorite Type: L3 chondrite

 

Macroscopic Description: René Martinet

Polygonally fractured fusion crust completely covers this small specimen. The interior is light gray with chondrules and other inclusions measuring up to ~3 mm in diameter. One dark haloed inclusion (metallic?) is ~7 mm across.

 

Thin Section (,3) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.1 mm across, in a minimum amount of dark matrix which contains some troilite and a little nickel-iron. A variety of chondrule types is present, including granular and porphyritic olivine and olivine-pyroxene, barred olivine, and fine-grained radiating pyroxene. Considerable weathering is indicated by brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-30, mean Fa14 (CV FeO is 59); pyroxene, Fs3-13. The small amount of nickel-iron suggests L group, and variability of olivine and pyroxene compositions type 3; hence the meteorite is classified as a L3 chondrite (estimated L3.4).

Data from:
  MB76
  Table 2
  Line 2912:
Origin or pseudonym:Upper Ice Tongue
Mass (g):28.8
Class:L3.4
Weathering grade:A/B
Fayalite (mol%):1-30
Ferrosilite (mol%):3-13
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 12(3) (1989), 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° 17' 12"S, 161° 21' 15"E)
Note: the NHM and MetBase coordinates are 3 km apart

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