Meteoritical Bulletin: Entry for Larkman Nunatak 04318

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Larkman Nunatak 04318

Basic information

Name: Larkman Nunatak 04318
This is an OFFICIAL meteorite name.
Abbreviation: LAR 04318
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 53.3 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 28(2)	(2005)	CK4
Meteoritical Bulletin:	MB 91	(2007)	CK4
Recommended:			CK4 [explanation]

This is 1 of 128 approved meteorites classified as CK4. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 1 Sep 2005

Writeup

Writeup from AMN 28(2):

Sample No.:	LAR 04317; LAR 04318
Location:	Larkman Nunatak
Field No.:	15551; 15495
Dimensions (cm):	2.0x2.0x1.0 4.5x2.5x3.0
Weight (g):	10.360; 53.304
Meteorite Type:	CK4 Chondrite

Macroscopic Description: Kathleen McBride
~90% of the exterior surface is covered with thick brown/black fusion crust with polygonal fractures. The interiors are composed of gray matrix with large chondrules and are very hard.

Thin Section (,3 ,4) Description: Tim McCoy
These meteorites are so similar that a single description suffices. The sections consist of large (up to 2 mm) chondrules and isolated mineral grains in a matrix of finer-grained silicates, sulfides and very abundant magnetite. Olivine is Fa_29-32 and calcic pyroxene is Fs₁₀Wo₄₅. The meteorites are CK4 chondrites.


LAR 04317 Cross-Polarized Light	LAR 04317 Reflected Light	LAR 04317 Cross-Polarized Light	LAR 04317 Reflected Light

Data from:
  MB91
  Table 4
  Line 695:

Mass (g):	53.3
Class:	CK4
Weathering grade:	A/B
Fayalite (mol%):	29-30

Catalogs:

Search for this meteorite in the NASA/JSC database (U.S.):

References:

Published in Antarctic Meteorite Newsletter 28(2) (2005), JSC, Houston
Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)

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Photos:

Credit	Photos
Photographs from AMN:
Photograph from unknown source	A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
unknown

Geography:

Antarctica

Coordinates:

Unknown.

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

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