首页|Long-lived lunar volcanism sustained by precession-driven core-mantle friction

Long-lived lunar volcanism sustained by precession-driven core-mantle friction

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Core-mantle friction induced by the precession of the Moon's spin axis is a strong heat source in the deep lunar mantle during the early phase of a satellite's evolution,but its influence on the long-term thermal evolution still remains poorly explored.Using a one-dimensional thermal evolution model,we show that core-mantle friction can sustain global-scale partial melting in the upper lunar mantle until～3.1 Ga,thus accounting for the intense volcanic activity on the Moon before～3.0 Ga.Besides,core-mantle friction tends to suppress the secular cooling of the lunar core and is unlikely to be an energy source for the long-lived lunar core dynamo.Our model also favours the transition of the Cassini state before the end of the lunar magma ocean phase(～4.2 Ga),which implies a decreasing lunar obliquity over time after the solidification of the lunar magma ocean.Such a trend of lunar obliquity evolution may allow volcanically released water to be buried in the lunar regolith of the polar regions.As a consequence,local water ice could be more abundant than previously thought when considering only its accumulation caused by solar wind and comet spreading.

Moonprecessionorbitvolcanism

Shuoran Yu、Xiao Xiao、Shengxia Gong、Nicola Tosi、Jun Huang、Doris Breuer、Long Xiao、Dongdong Ni

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State Key Laboratory of Lunar and Planetary Sciences,Macau University of Science and Technology,Macau 999078,China

Planetary Science Institute,State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences,China University of Geosciences,Wuhan 430074,China

CAS Key Laboratory of Planetary Sciences,Shanghai Astronomical Observatory,Shanghai 200030,China

Institute of Planetary Research,German Aerospace Centre(DLR),Berlin 12489,Germany

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Development Fund,Macau SARScience and Technology Development Fund,Macau SARPre-Research Projects on Civil Aerospace Technologies of the China National Space AdministrationPre-Research Projects on Civil Aerospace Technologies of the China National Space AdministrationPre-Research Projects on Civil Aerospace Technologies of the China National Space AdministrationPre-Research Projects on Civil Aerospace Technologies of the China National Space AdministrationPre-Research Projects on Civil Aerospace Technologies of the China National Space Administration

12022517S.Y.D.N0048/2020/A1S.Y.D.ND020303S.Y.D.N.D020308X.X.J.H.L.X

2024

10.1093/nsr/nwad276

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ISSN：
年,卷(期)：2024.11(2)
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