Meteoritical Bulletin: Entry for Lewis Cliff 86210

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Lewis Cliff 86210

Basic information

Name: Lewis Cliff 86210
This is an OFFICIAL meteorite name.
Abbreviation: LEW 86210
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 9.2 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 11(1)	(1988)	Mesosiderite
Meteoritical Bulletin:	MB 76	(1994)	Mesosiderite
NHM Catalogue:	5th Edition	(2000)	Mesosiderite
MetBase:	v. 7.1	(2006)	Mesosiderite
Recommended:			Mesosiderite [explanation]

This is 1 of 256 approved meteorites classified as Mesosiderite. [show all]
Search for other: Mesosiderites, Metal-rich meteorites

Comments:

Field number: 2306

Writeup

Writeup from AMN 11(1):

Sample No.: LEW86210

Location: Lewis Cliff

Weight (g): 9.2

Field No.: 2306

Dimensions (cm): 1.5x1.5x1.5

Meteorite Type: Mesosiderite

Macroscopic Description: Cecilia Satterwhite,

This pebble is weathered reddish-brown. Interior has very high metallic fraction; 1-2 mm-size tan-colored inclusions are abundant.

Thin Section (,2) Description: Brian Mason

The section consists of a granular aggregate of about 50% nickel-iron, 50% silicates. The silicates are dominantly pyroxene with lesser amounts of plagioclase, as clastic grains up to 1.5 mm in maximum dimension in a matrix of comminuted silicates. Minor weathering is indicated by small areas of brown limonite. Microprobe analyses show pyroxene compositions with a range of Wo2-8Fs24-61; most grains are in the range Fs24-31, with a mean of Wo4Fs29. Plagioclase composition is An89-92. One grain of olivine, Fa45, was analysed. The meteorite is a mesosiderite.

Data from:
  MB76
  Table 2
  Line 3251:

Origin or pseudonym:	Lower Ice Tongue
Mass (g):	9.2
Class:	Meso
Weathering grade:	C
Fayalite (mol%):	45
Ferrosilite (mol%):	24-61

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 11(1) (1988), 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' 21"S, 161° 22' 20"E)

Note: the NHM and MetBase coordinates are 4.4 km apart

Statistics:
This is 1 of 43857 approved meteorites from Antarctica (plus 3802 unapproved names)

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