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Lunar Meteorite

Lahmada 020

Western Sahara

 

A large slice of Lahmada 020. Mendy says “The strange looking "scratches" appear to be contraction cracks. They are not due to the polish or prep.” Click on image for enlargement.
(photo credit: Mendy Ouzillou)

 

Lahmada 020: A large FeNi metal grain (top left), a larger anorthosite clast (bottom right). and veins filled with terrestrial evaporite minerals.
(photo credit: Mendy Ouzillou)

 

Lahmada 020: Glassy melt with vesicles.
(photo credit: Mendy Ouzillou)

 

from The Meteoritical Bulletin, No. 108

 

Lahmada 020

 

Western Sahara

Find: 2018 November

Mass: 12,168 g

 

Lunar Meteorite (Lunar meteorite (feldspathic breccia))

 

History: Found at a location north of Jdiriya, Morocco, near Oued Skikima, in November 2018. Material was obtained by Ahmad Bouragaa and Aziz Habibi, and some was purchased by Mark Lyon and Mendy Ouzillou in November 2018.

 

Physical characteristics: Multiple pieces (total 12.168 kg) of the same distinctive very fine grained, dark gray microvesicular material with sparse, irregularly distributed small milky clasts.

 

Petrography: (A. Irving and S. Kuehner, UWS) Sparse, very small mineral clasts of anorthite, olivine, pigeonite and augite occur within a dominant extremely fine grained, microvesicular matrix containing accessory kamacite, troilite and minor barite.

 

Geochemistry: Olivine (Fa34.0-35.8, FeO/MnO = 86-94, N = 2), pigeonite (Fs22.7-28.6Wo8.2-8.8, FeO/MnO = 49-59, N = 2), augite (Fs17.1-17.4Wo38.5-36.6, FeO/MnO = 51-54, N = 2), anorthite (An95.8-96.9Wo0.4-0.2, N = 2).

 

Classification: Lunar (feldspathic regolith melt breccia).

 

Specimens: 20.62 g including a polished slice and one polished thin section at UWB; remainder with A. Bouragaa, A. Habibi, M. Lyon and M. Ouzillou.

 

Randy Says…

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

Lahmada 020

References

 

 

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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 that
you’ve found until you read this and this.

 

e-mailkorotev@wustl.edu

Last revised: 12 February 2019