High Resolution Chronology of the Solar System

Lars Borg | 23-ERD-003

Executive Summary

We will develop a high-precision, uranium lead-based chronometer to substantially increase the time resolution in understanding critical questions in cosmochemistry. This will bring understanding to critical questions in solar system science, including the timing of stellar additions to the nascent solar system, the relationships between primary and secondary lunar crust, and the origin of basaltic rocks erupted on Mars.

Publications, Presentations, and Patents

Kruijer T. S., Borg L. E., Cassata W. S., Wimpenny J., Brennecka G. Shearer C. K., and Simon S. B. “Chronology of alkali anorthosite 14304 clast “b” records basin forming impact at ~3.95 Ga.” Geochimica et Cosmochimica Acta 358, 61-76(2023) LLNL-JRNL-844335.

Borg L. E. and Carlson, R. W. “The Evolving Chronology of Moon Formation.” Annual Review of Earth and Planetary Sciences, 51 (2023) LLNL-JRNL-832455.

Render, J, Wimpenny J., and Borg L. “Gallium isotopic constraints for the origin of the Earth Moon system.” Earth and Planetary Science Letters 661, 118146 (2023). LLNL-JRNL-837296.

Borg, L. E., Brennecka, G. A., & Kruijer, T. S. “The origin of volatile elements in the Earth–Moon system." Proceedings of the National Academy of Sciences, 119(8) (2022). LLNL-JRNL-827054.

Borg L. E., Gaffney A. M. “A deep lunar magma ocean.” Abstract, Annual Meteoritical Society Meeting, Los Angeles, CA (2023). LLNL-ABS-849749

Kruijer T. S. Tungsten isotopes and the early Solar System.” Abstract, EGU General Assembly, Vienna, Austria (2023). LLNL-CONF-847653

Borg L. E., Brennecka G. A., Kruijer T. S. The origin of volatile element depletion in the Earth-Moon system.” Abstract, Lunar and Planetary Science Conference #1054, The Woodlands, TX.  (2023) LLNL-PRES-847657

Borg L. E. “Science objectives enabled by the Endurance mission.” Abstract, Endurance Science Workshop, Pasadena, CA (2023). LLNL-ABS-850956