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The Nature of Late-Stage Additions to the Moon and Earth: Evidence From Highly Siderophile Elements in Lunar Impact Melt Rocks

Presenter: Richard Walker, University of Maryland
When: October 27, 2015 3PM PDT

The Earth and Moon underwent a late stage bombardment of sizable impactors that some place at approximately 3.9 billion years ago. This activity is evidence by the basalt-filled basins on the Moon. This final phase of appreciable planetary accretion in the inner solar system may have provided water and organ matter to Earth. A chemical and isotopic record of late-stage impactors to the Earth-Moon system is provided by lunar impact melt rocks, which were generated by the basin-forming events. I will review prior work on these rocks and where future work is heading.

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