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Lunar Meteorite: Dhofar 1428

Oman


Dhofar 1428 in the desert (photo courtesy of Michael Farmer)


Slab of Dhofar 1428 (photo courtesy of Michael Farmer)

Chips of Dhofar 1428 (Photo by Randy Korotev)
 


It's a rather typical feldspathic lunar meteorite.
  

 

from The Meteoritical Bulletin No. 91, Meteoritic & Planetary Science 42, 413-466 (2007)

Dhofar 1428

Oman 
Find: March 2006
Achondrite (Lunar anorthositic breccia)

Physical characteristics: A 213 g dark gray stone with little remaining fusion crust found within the desert of the Dhofar regions of Oman. Petrography: (T. Bunch and J. Wittke, NAU) Clast-rich impact melt breccia (mingled) that consists mostly of light to dark gray clasts of previously formed, plagioclase-rich breccias and white lithic and mineral clasts of anorthositic rocks and plagioclase. Minor amounts of norites, anorthositic gabbros, troctolites, and ophitic/subophitic basalts were also observed. Groundmass is composed of quench-textured silicate melt (plagioclase, pyroxenes, opaque minerals and glass) and isolated pockets of vesicular glassy melt. Geochemistry: Anorthositic clast plagioclase (An93.8-98); Norite olivine (Fa36, FeO/MnO = 104), plagioclase (An96.4), orthopyroxene (Fs28.4Wo4.1, FeO/MnO = 51); Troctolite plagioclase (An95.5), olivine (Fa25.8, FeO/MnO = 89); Subophitic basalts that contain highly zoned pyroxenes (Fs14.9Wo5.1 to rims of Fs41.2Wo15.2). Classification: Achondrite (Lunar anorthositic breccia); Components shock levels range from moderate to completely melted and the degree of interior weathering is very low. Specimens: A 20.7 g type sample is on repository at NAU. Mr. R. Ward holds the main mass.
  

More Information

Meteoritical Bulletin Database

Dhofar 1428

Map

Schematic Map of the Find Locations of the Dhofar Lunar Meteorites

References

Bunch T. E., Wittke J. H., and Korotev R. L. (2006) Petrology and composition of lunar feldspathic breccias NWA 2995, Dhofar 1180 and Dhofar 1428 (abstract). 69th Annual Meeting of the Meteoritical Society, abstract no. 5254. Lunar and Planetary Institute, Houston.

Hidaka Y., Yamaguchi A., and Ebihara M. (2009) Geochemistry and petrology of lunar meteorite Dhofar 1428 (abstract). 72th Annual Meeting of the Meteoritical Society, number 5329.

Korotev R. L. and Zeigler R. A. (2007) Keeping up with the lunar meteorites (abstract). In Lunar and Planetary Science XXXVIII, abstract no. 1340, Lunar and Planetary Institute, Houston.

Liu Y. Zhang A. Taylor L. A. (2009) Fragments of asteroids in lunar rocks (abstract). 72th Annual Meeting of the Meteoritical Society, number 5434.

Zhang A. C., Hsu W. B., Liu Y., and Taylor L. A. (2009) Petrography and mineralogy of Dhofar 1428 lunar highland regolith breccia (abstract). 72th Annual Meeting of the Meteoritical Society, number 5096.

Chemical Classification

Overview | Dhofar 1428
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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