Lunar Meteorite

Dominion Range 18262, 18509, 18543, 18666, & 18678
(paired stones)

Dominion Range, Antarctica

 

A picture containing indoor

Description automatically generated

Dominion Range 18262

(image credit: NASA)

 

A close up of a piece of paper

Description automatically generated

Dominion Range 18509

(image credit: NASA)

 

Dominion Range 18543

(image credit: NASA)

 

A picture containing indoor, table

Description automatically generated

Dominion Range 18666

(image credit: NASA)

 

A close up of a box

Description automatically generated

Dominion Range 18678

(image credit: NASA)

 

from The Meteoritical Bulletin, No. 108

Dominion Range (DOM) 18262, 18509, 18543, 18666, & 18678

Dominion Range, Antarctica
Found: 2018
Mass: 6.777g, 16.52 g, 13.59 g, 45.87 g, and 11.64 g (total: 94.40)

Mineral Composition: Fayalite (mol%): 71-95; Ferrosilite (mol%): 29-79

Weathering: A/B

Fracturing: A

Macroscopic Description - Cecilia Satterwhite (NASA-JSC). The exterior has black patches of fusion crust on a brown rusty exterior with some white specks visible. The fine grained black matrix has abundant white/tan inclusions with minor oxidation.

Thin Section Description (,2) - Cari Corrigan, Tim McCoy (National Museum of Natural History, Smithsonian Institution) These sections are similar enough that one description will suffice. These sections consist of a highly brecciated assemblage of mostly single mineral grains ranging up to 0.5 mm in size. Grains are dominated by pyroxene and plagioclase with rare large olivine fragments. Polymineralic igneous fragments/clasts include coarse grained gabbro and symplectites. Melt veins and pockets were observed in all sections. DOM 18262 contains a fine grained apparently anorthositic fragment (~2 mm in max dimension) and a few melt droplets (approx. 100 microns in diameter) were observed. Olivines are fayalitic (Fa90-99), although two grains of Fa56 and Fa71 were analyzed. Pyroxene is dominantly pigeonite with fine exsolution, with orthopyroxene of Fs27Wo3 and augite Fs50Wo40. Rare high-FeO pigeonite (up to Fs80) is observed associated with the symplectite. Fe/Mn of pyroxenes ranges from ~50-70. Plagioclase is calcic with An90-97Or0.1-0.7. These meteorites are lunar basaltic breccias, likely regolith breccias.

 

 

Randy SaysÖ

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

DOM 18262 | 18509 | 18543 | 18666 | 18678

 

Map

ANSMET Location Map

 

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: 14 August 2019

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