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Lewis Cliff 88763
Basic information Name: Lewis Cliff 88763
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88763
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 4.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  Brachina-like
Meteoritical Bulletin:  MB 76  (1994)  Brachinite
NHM Catalogue:  5th Edition  (2000)  Achondrite-ung
MetBase:  v. 7.1  (2006)  Brachinite
Recommended:  Brachinite    [explanation]

This is 1 of 46 approved meteorites classified as Brachinite.   [show all]
Search for other: Brachinites, Primitive achondrites
Comments: Field number: 4475
Writeuphelp
Writeup from AMN 14(2):

Sample No.: LEW88763

Location: Lewis Cliff

Field Number: 4475

Dimensions (cm): 2.0 x 1.6 x 0.6

Weight (g): 4.1

Meteorite Type: Achondrite, Brachina-like

 

Macroscopic Description: Robbie Marlow,

Thick rough, dull, black fusion crust covers 95% of this meteorite. The exposed interior is dark in color and crystalline with a massive texture.

 

Thin Section (.21 Description: Brian Mason

The section consists largely of an equigranular aggregate of anhedral olivine (grain size 0.3-0.6 mm), with minor amounts of plagioclase and pyroxene and a little opaque material. Well-preserved fusion crust, 1.2 mm thick, borders part of the section. Microprobe analyses give the following compositions: olivine, Fa33; pyroxene, Wo35Fs18; plagioclase An21. The meteorite is an achondrite, very similar to Brachina in texture and mineral compositions.

 

Data from:
  MB76
  Table 2
  Line 4603:
Origin or pseudonym:Lower Ice Tongue
Mass (g):4.1
Class:Brach
Weathering grade:B
Fayalite (mol%):33
Ferrosilite (mol%):18
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° 14' 45"S, 161° 24' 5"E)
Note: the NHM and MetBase coordinates are 5.5 km apart

Statistics:
     This is 1 of 38940 approved meteorites from Antarctica (plus 5051 unapproved names)
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