Petrography and geochemistry of lunar meteorites Dhofar 1673, 1983, and 1984

1Patrick J. A. Hill,1,2Gordon R. Osinski,1Neil R. Banerjee,3Randy L. Korotev,4Sobhi J. Nasir,5Christopher D. K. Herd
Meteoritics & Planetray Science (in Press) Link to Article [https://doi.org/10.1111/maps.13207]
1Department of Earth Science and Centre for Planetary Science and Exploration, University of Western Ontario, London, Ontario, Canada
2Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada
3Department of Earth and Planetary Sciences, Washington University in Saint Louis, St. Louis, Missouri, USA
4Earth Sciences Research Center, Sultan Qaboos University, 123 Muscat, Oman
5Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, Canada
Published by arrangement with John Wiley & Sons

The Dhofar 1673, Dhofar 1983, and Dhofar 1984 meteorites are three lunar regolith breccias classified based on their petrography, mineralogy, oxygen isotopes, and bulk chemistry. All three meteorites are dominated by feldspathic lithic clasts; however, impact melt rock clasts and spherules are also found in each meteorite. The bulk chemistry of these samples is similar to other feldspathic highland meteorites with the Al2O3 content only slightly lower than average. Within the lithic clasts, the Mg # of mafic phases versus the anorthite content of feldspars is similar to other highland meteorites and is found to plot intermediate of the ferroan‐anorthositic suite and magnesian suite. The samples lack any KREEPy signature and have only minor indications of a mare basalt component, suggesting that the source region of all three meteorites would have been distal from the Procellarum KREEP Terrane and could have possibly been the Feldspathic Highland Terrane. All three meteorites were found within 500 m of each other in the Dhofar region of Oman. This, together with their similar petrography, stable isotope chemistry, and geochemistry indicates the possibility of a pairing.

Discuss

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s