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Lewis Cliff 88176
Basic information Name: Lewis Cliff 88176
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88176
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 7.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  LL3
Meteoritical Bulletin:  MB 76  (1994)  LL3.6
NHM Catalogue:  5th Edition  (2000)  LL3.6
MetBase:  v. 7.1  (2006)  LL3.6
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: 5310
Writeuphelp
Writeup from AMN 14(2):

Sample No.: LEW88176

Location: Lewis Cliff

Field Number: 5310

Dimensions (cm): 2 x 1.5 x 1.5

Weight (g): 7.5

Meteorite Type: LL3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

Frothy fusion crust covers 80% of LEW88176. This meteorite broke along a pre-existing fracture revealing a heavily weathered interior with some inclusions/chondrules still visible.

 

Thin Section (,2) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 1.8 mm across, in a matrix of fine-grained olivine and pyroxene with a little nickel-iron and troilite. Extensive weathering is indicated by brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa9-38, mean Fa20 (CV FeO is 38); pyroxene, Fs3-16. The small amount of nickel-iron suggests LL group, and the variability of olivine and pyroxene compositions type 3, hence the meteorite is classified as an LL3 chondrite (estimated LL3.6).

 

Data from:
  MB76
  Table 2
  Line 4032:
Origin or pseudonym:Lower Ice Tongue
Mass (g):7.5
Class:LL3.6
Weathering grade:B/C
Fayalite (mol%):9-38
Ferrosilite (mol%):3-16
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 14(2) (1991), 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' 3"S, 161° 24' 50"E)
Note: the NHM and MetBase coordinates are 5.2 km apart

Statistics:
     This is 1 of 40756 approved meteorites from Antarctica (plus 4494 unapproved names)
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