Exogenic origin for the volatiles sampled by the Lunar CRater Observation and Sensing Satellite impact

K E Mandt; O Mousis; D Hurley; A Bouquet; K D Retherford; L O Magaña; A Luspay-Kuti

doi:10.1038/s41467-022-28289-6

Exogenic origin for the volatiles sampled by the Lunar CRater Observation and Sensing Satellite impact

Nat Commun. 2022 Feb 8;13(1):642. doi: 10.1038/s41467-022-28289-6.

Authors

K E Mandt¹, O Mousis², D Hurley³, A Bouquet^{2

4}, K D Retherford^{5

6}, L O Magaña^{5

6}, A Luspay-Kuti³

Affiliations

¹ Johns Hopkins Applied Physics Laboratory, 11100 Johns Hopkins Rd, 20723, Laurel, MD, USA. Kathleen.Mandt@jhuapl.edu.
² Aix Marseille Université, CNRS, CNES, LAM, Marseille, France.
³ Johns Hopkins Applied Physics Laboratory, 11100 Johns Hopkins Rd, 20723, Laurel, MD, USA.
⁴ Aix Marseille Université, CNRS, PIIM, Marseille, France.
⁵ Southwest Research Institute, San Antonio, TX, USA.
⁶ University of Texas at San Antonio, San Antonio, TX, USA.

Abstract

Returning humans to the Moon presents an unprecedented opportunity to determine the origin of volatiles stored in the permanently shaded regions (PSRs), which trace the history of lunar volcanic activity, solar wind surface chemistry, and volatile delivery to the Earth and Moon through impacts of comets, asteroids, and micrometeoroids. So far, the source of the volatiles sampled by the Lunar Crater Observation and Sensing Satellite (LCROSS) plume has remained undetermined. We show here that the source could not be volcanic outgassing and the composition is best explained by cometary impacts. Ruling out a volcanic source means that volatiles in the top 1-3 meters of the Cabeus PSR regolith may be younger than the latest volcanic outgassing event (~1 billion years ago; Gya).

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't

Grants and funding

80NSSC19K1306/ImNASA/Intramural NASA/United States