Heavy Bombardment of the Moon at ~4.2 Ga: Evidence from Ages of Lunar Melt Breccias and Zircons

Details Heavy Bombardment of the Moon at ~4.2 Ga: Evidence from Ages of Lunar Melt Breccias and Zircons Heavy Bombardment of the Moon at ~4.2 Ga: Evidence from Ages of Lunar Melt Breccias and Zircons

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012lpi....43.1368n&link_type=abstract

43rd Lunar and Planetary Science Conference, held March 19–23, 2012 at The Woodlands, Texas. LPI Contribution No. 1659, id.1368

Physics

Scientific paper

U-Pb ages of apatite and zirconalite in 67955 confirm an age of 4.2 Ga
followed by a thermal overprint at 3.9 Ga. Lunar zircon ages imply
episodic bombardment of the Moon between 3.8 and 4.4 Ga. Some lunar
basins are likely older than 3.9 Ga.

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