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Lewis Cliff 88121
Basic information Name: Lewis Cliff 88121
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88121
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 15.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 13(3)  (1990)  H3
Meteoritical Bulletin:  MB 76  (1994)  H3.4
NHM Catalogue:  5th Edition  (2000)  H3.4
MetBase:  v. 7.1  (2006)  H3.4
Recommended:  H3.4    [explanation]

This is 1 of 17 approved meteorites classified as H3.4.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 4655
Writeuphelp
Writeup from AMN 13(3):

Sample No. LEW88121

Location: Lewis Cliff

Dimensions (cm): 2 x 2 x 1.5

Field Number: 4655

Weight (g): 15.6

Meteorite Type: H3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

This blocky shaped meteorite is 95% covered with fusion crust. The overall color of the interior is yellow brown. Although the oxidation masks most of the features present, abundant inclusions are still visible in a small area where the matrix is gray.

 

Thin Section (,2) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.4 mm across, in a matrix consisting of fine-grained silicates, a moderate amount of nickel-iron, and minor troilite. Most of the chondrules are granular to porphyritic olivine and olivine-pyroxene, but some radiating and cryptocrystalline pyroxene chondrules were noted. The meteorite is considerably weathered, with small areas of brown limonite throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-23, mean Fa12 (CV FeO is 54); pyroxene, Fs8-17. The amount of metal indicates H group, and the variability of olivine and pyroxene compositions type 3, hence the meteorite is classified as an H3 chondrite (estimated H3.4).

 

Data from:
  MB76
  Table 2
  Line 3977:
Origin or pseudonym:Lower Ice Tongue
Mass (g):15.6
Class:H3.4
Weathering grade:B/C
Fayalite (mol%):1-23
Ferrosilite (mol%):8-17
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 13(3) (1990), 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' 10"S, 161° 22' 24"E)
Note: the NHM and MetBase coordinates are 4.7 km apart

Statistics:
     This is 1 of 38937 approved meteorites from Antarctica (plus 5051 unapproved names)
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