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

作　　者：Shuoran Yu Xiao Xiao Shengxia Gong Nicola Tosi Jun Huang Doris Breuer Long Xiao Dongdong Ni 

机构地区：[1]State Key Laboratory of Lunar and Planetary Sciences,Macao University of Science and Technology,Macao 999078,China [2]Planetary Science Institute,State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences,China University of Geosciences,Wuhan 430074,China [3]CAS Key Laboratory of Planetary Sciences,Shanghai Astronomical Observatory,Shanghai 200030,China [4]Institute of Planetary Research,German Aerospace Centre(DLR),Berlin 12489,Germany

出　　处：《National Science Review》2024年第2期109-118,共10页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China under 12022517 (S.Y., D.N.);the Science and Technology Development Fund,Macao SAR under 0048/2020/A1 (S.Y., D.N.);Pre-Research Projects on Civil Aerospace Technologies of the China National Space Administration under D020303 (S.Y., D.N.) and D020308 (X.X., J.H., L.X.)

摘　　要：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.

关 键 词：MOON PRECESSION orbit VOLCANISM 

分 类 号：P184[天文地球—天文学]