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Larkman Nunatak 06870
Basic information Name: Larkman Nunatak 06870
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 06870
Observed fall: No
Year found: 2006
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 15.4 g
Antarctic Meteorite Newsletter:  AMN 30(2)  (2007)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 31 Aug 2007
Writeup from AMN 30(2):
Sample No.: LAR 06870
Location: Larkman Nunatak
Field No.: 19944
Dimensions (cm):   2.5 x 1.75 x 2.0
Weight (g): 15.43
Meteorite Type:

Eucrite (Brecciated)

Macroscopic Description: Kathleen McBride
95% black fusion crust covers the exterior, which is dull on one surface and shiny on the other. The interior is a gray and white matrix with a powdery texture.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
The meteorite is a breccia that has been metamorphosed and shocked. Basaltic clasts measuring from 0.5-4 mm vary widely in texture and grain size (0.1-1 mm), reflecting their variable cooling histories, and boundaries between clasts and matrix have been largely obscured by later metamorphism. Pyroxenes are exsolved and pervasive shock effects include mosaicism in pyroxene. Mineral compositions are nearly homogeneous with orthopyroxene (Fs60Wo2), augite (Fs30Wo39), and plagioclase (An78-86Or1). The Fe/Mn ratio of the pyroxene is ~30. The meteorite is a brecciated eucrite.

Thin Section Images

Plane-Polarized Light
LAR 06870
Cross Polarized Light
LAR 06870
LAR06870 - Plane-Polarized LightLAR06870 - Plane-Polarized Light LAR06870 - Cross Polarized LightLAR06870 - Cross Polarized Light

Lab Images

LAR 06870

Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 30(2) (2007), JSC, Houston
Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Photographs from AMN:
JSC A photo is in the write-up above


     This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names)

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