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Lewis Cliff 88783
Basic information Name: Lewis Cliff 88783
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88783
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 9.8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(1)  (1992)  LL3
Meteoritical Bulletin:  MB 76  (1994)  LL3.6
NHM Catalogue:  5th Edition  (2000)  LL3.6
MetBase:  v. 7.1  (2006)  LL3
Recommended:  LL3.6    [explanation]

This is 1 of 21 approved meteorites classified as LL3.6.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 5372
Writeuphelp
Writeup from AMN 15(1):

Sample No.: LEW88783

Location: Lewis Cliff

Field Number: 5372

Dimensions (cm): 2.5 x 2.0 x 1.5

Weight (g): 9.8

Meteorite Type: LL3 chondrite

 

Macroscopic Description: Robbie Marlow

No fusion crust remains on this weathered stone. Evaporite deposit is present on the exterior surface. The interior is red brown with small areas of gray matrix scattered throughout. One millimeter sized orange inclusion was noted. Oxidation is heavy.

 

Thin Section (,2) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.9 mm across, in a minimum amount of black opaque matrix which contains accessory amounts of nickel-iron and troilite. Minor weathering is indicated by scattered areas of brown limonite. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa7-34, mean Fa18 (CV FeO is 38); pyroxene, Fs1-18. The variability of olivine and pyroxene compositions indicates type 3, and the amount of nickel-iron LL group, hence the meteorite is classified as an LL chondrite (estimated LL3.6).

 

Data from:
  MB76
  Table 2
  Line 4622:
Origin or pseudonym:Lower Ice Tongue
Mass (g):9.8
Class:LL3.6
Weathering grade:Ce
Fayalite (mol%):7-34
Ferrosilite (mol%):1-18
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° 15' 0"S, 161° 25' 42"E)
Note: the NHM and MetBase coordinates are 5.4 km apart

Statistics:
     This is 1 of 40744 approved meteorites from Antarctica (plus 4494 unapproved names)
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