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Lunar Meteorite

Northwest Africa 11801

northwestern Africa

 

Northwest Africa 11801. Click on image for enlargement
(photo credit: Zhipeng Xia)

 

Backscattered electron image of a thin section of NWA 11801. Click on image for enlargement
(image credit: Zhipeng Xia)

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11801

 

Algeria

Purchased: 2016 May 1

Mass: 67.05

 

Lunar meteorite

 

History: Purchased by Miao Bing-an in 2016 from Morocco.

 

Physical characteristics: This meteorite is in irregular and brecciated, partially covered with black fusion crust. A saw cut reveals an abundance of fragments set in dark-colored matrix.

 

Petrography: (B. Miao, H. Liu, Z. Xia, Guilin University of Technology) The section is composed of abundant mineral fragments and a few lithic clasts and glass set in a fine-grained matrix. The mineral fragments, lithic clasts, and glass areas show irregular shapes and variable textures with different sizes (from ~10 μm to ~4.1 mm across). The matrix is made up of fine-grained minerals bound by glassy cement. Mineral fragments include plagioclase, pyroxene, olivine, and minor ilmenite, chromite, silica, Ni-Fe metal, troilite, armalcolite, k-feldspar. The section contains various types of lithic clasts (anorthosite, gabbro, troctolite, and crystalline impact melt breccia). Several glassy spheres and veins were found in the thin section. One anomalously large glassy vein (up to 2.7 mm thick) that crosscut the section was observed.

Geochemistry: Plagioclase An91-96Or<0.4; pyroxene Wo4-36En7-69; olivine Fo10-83. The Fe/Mn ratios of pyroxene and olivine in this meteorite lie approximately along the lunar line, although the range of values is very large (44-79 for pyroxene and 72-127 for olivine).

 

Classification: Lunar (breccia)

 

Specimens: Specimen and a polished thin section are deposited in GUT

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Randy SaysÖ

I donít have a sample of this one. It may be another NWA 8046 pair.

 

More Information

Meteoritical Bulletin Database

NWA 11801

References

 

 

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Prepared by: Randy L. Korotev

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

Please donít contact me about the meteorite you think that
youíve found until you read this and this.

 

e-mailkorotev@wustl.edu

Last revised: 11 June 2018