LAR 06638

Lunar Meteorite: Larkman Nunatak (LAR) 06638

Antarctica

Photo courtesy of NASA.

Small samples of LAR 06638. Millimeter ticks for scale.
(Photo by Randy Korotev)

At 5 g, the stone is small.

It's a rather typical feldspathic lunar meteorite.

Classification from Antarctic Meteorite Newsletter, Vol. 30, No. 2, 2007

Sample No.: LAR 06638
Location: Larkman Nunatak
Field No.: 19362
Dimensions (cm): 2.5 x 2.0 x 0.75
Weight (g): 5.293

Meteorite Type: Lunar-Anorth. Breccia

Macroscopic Description: Kathleen McBride

The bottom exterior surface has black fusion crust, while the top has a lighter brown crust. Polygonal fractures are present. The gray and white matrix has a sharp line where matrix becomes black with white inclusions.

Thin Section (,2) Description: Tim McCoy, Lauren LaCroix and Linda Welzenbach

The section shows a groundmass of comminuted pyroxene, olivine and plagioclase with grain sizes up to 1 mm. Clasts up to 2 mm include basalts, granulites and anorthosites. One-half of the section exhibits a darkened matrix. Olivine is Fa_28-33, pyroxene ranges from Fs_27-39Wo_3-12 (Fe/Mn ~ 60), and plagioclase An_93-98. The meteorite is lunar, probably an anorthositic regolith breccia.

More Information

Meteoritical Bulletin Database

LAR 06638

Map

ANSMET location Map

References

Korotev R. L., Irving A. J., and Bunch T. E. (2008) Keeping up with the lunar meteorites – 2008 (abstract). In Lunar and Planetary Science XXXIX, abstract no. 1209, 39th Lunar and Planetary Science Conference, Houston.

Chemical Classification

Overview | LAR 06638

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Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.

e-mail: korotev@wustl.edu

Last revised: 10-Jul-2009