Meteoritical Bulletin: Entry for Lewis Cliff 85311

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Lewis Cliff 85311

Basic information

Name: Lewis Cliff 85311
This is an OFFICIAL meteorite name.
Abbreviation: LEW 85311
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 199.5 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 9(3)	(1986)	C2
Meteoritical Bulletin:	MB 76	(1994)	C2
NHM Catalogue:	5th Edition	(2000)	CM2
MetBase:	v. 7.1	(2006)	CM2
Antarctic Meteorite Newsletter:	AMN 31(1)	(2008)	CM2
	AMN 41(1)	(2018)	CM2-an
Recommended:			CM2-an [explanation]

This is 1 of 10 approved meteorites classified as CM2-an. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites

Comments:

Field number: 3103
Revised 3 Jun 2019: reclassified in AMN 41(1)

Writeup

Writeup from AMN 9(3):

See LEW 85306

Database editor's note: Two oxygen isotope analyses of this meteorite appear in the paper by R. N.Clayton and T. K.Mayeda (GCA, 1999, v.63, p.2089). The analysis in Table 4 of that paper (δ¹⁸O= -1.23, δ¹⁷O= -3.87, Δ¹⁷O= -3.23) is actually that of an olivine separate. The analysis in Table 5 is the correct bulk value (δ¹⁸O= +1.21, δ¹⁷O= -2.98, Δ¹⁷O= -3.61). R. N. Clayton, private communication to J. Grossman (Feb. 22, 2008).

Writeup from AMN 41(1):

LEW 85311: reclassification

Listed by Choe et al. (2010) as CM2-anomalous

Bibliography:

Choe W. H., Huber H., Rubin A.E., Kallemeyn G. W., and Wasson J. T. (2010) Compositions and taxonomy of 15 unusual carbonaceous chondrites. Meteorit. Planet. Sci. 45, 531-554 (link)

Data from:
  MB76
  Table 2
  Line 2884:

Origin or pseudonym:	Upper Ice Tongue
Mass (g):	199.5
Class:	C2
Weathering grade:	Be
Fayalite (mol%):	0.4-36
Ferrosilite (mol%):	0.9-1.1
Comments:	NTL=<1; 85306 pairing group

Plots:

O isotopes:

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
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References:

Published in Antarctic Meteorite Newsletter 41(1) (2018), JSC, Houston
Published in Antarctic Meteorite Newsletter 9(3) (1986), 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' 11"S, 161° 27' 36"E)

Note: the NHM and MetBase coordinates are 4.5 km apart

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

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Revision
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