Meteoritical Bulletin: Entry for Lewis Cliff 85452

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Lewis Cliff 85452

Basic information

Name: Lewis Cliff 85452
This is an OFFICIAL meteorite name.
Abbreviation: LEW 85452
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 9.2 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 13(2)	(1990)	L3
Meteoritical Bulletin:	MB 76	(1994)	L3.6
NHM Catalogue:	5th Edition	(2000)	L3.6
MetBase:	v. 7.1	(2006)	L3.6
Recommended:			L3.6 [explanation]

This is 1 of 62 approved meteorites classified as L3.6. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Field number: 3140

Writeup

Writeup from AMN 13(2):

Sample No. LEW85452

Location: Lewis Cliff

Dimensions (cm): 2x1.5x0.5

Field Number: 3140

Weight (g): 9.2

Meteorite Type: L3 chondrite

Macroscopic Description: Cecilia Satterwhite

Black fusion crust completely covers LEW85452. The interior structure has been obliterated by oxidation.

Thin Section (,3) Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.4 mm across, in a finely granular matrix containing some troilite and nickel-iron. Chondrule types include granular and porphyritic olivine and olivine-pyroxene, and fine-grained to cryptocrystalline pyroxene. Olivine and pyroxene show a wide range in composition: olivine, Fa5-23, mean Fa15 (CV FeO is 35); pyroxene, Fs2-18. This range of compositions indicates type 3, and the small amount of nickel-iron suggests L group; the meteorite is therefore classed as an L3 chondrite (estimated L3.6).

Data from:
  MB76
  Table 2
  Line 3023:

Origin or pseudonym:	Upper Ice Tongue
Mass (g):	9.2
Class:	L3.6
Weathering grade:	C
Fayalite (mol%):	5-23
Ferrosilite (mol%):	2-18

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):

References:

Published in Antarctic Meteorite Newsletter 13(2) (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° 16' 37"S, 161° 22' 33"E)

Note: the NHM and MetBase coordinates are 3.3 km apart

Statistics:
This is 1 of 44547 approved meteorites from Antarctica (plus 3802 unapproved names)

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Revision
history:

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