Long-term cycles of the Solar System concealed in the Mesozoic sedimentary basin record  

作　　者：Rui ZHANG Zhijun JIN Michael GILLMAN Quanyou LIU Ren WEI Peng LI Zhihui ZHANG 

机构地区：[1]Institute of Energy,Peking University,Beijing,100871,China [2]Key Laboratory of Orogenic Belts and Crustal Evolution,MOE,School of Earth and Space Sciences,Peking University,Beijing,100871,China [3]State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,SINOPEC,Beijing,102206,China [4]School of Life Sciences,University of Lincoln,Lincoln,LN67TS,UK [5]College of Earth Sciences and Engineering,Shandong University of Science and Technology,Qingdao,266590,China

出　　处：《Science China Earth Sciences》2023年第2期358-376,共19页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42102166,42090025,and 41625009)。

摘　　要：Mounting evidence indicates that the orbital period of the solar system’s movement through the Milky Way has had a controlling effect on processes of the Earth’s system throughout the Phanerozoic.To decipher the response of a given terrestrial basin’s rhythms to galactic dynamics,for the first time,we report long-term cycles recorded in the Mesozoic Ordos Basin(Central China).The astronomical time scale(ATS)was established for each successive sedimentary sequence,and the duration of unconformity episodes was estimated based on the chronological constraints.Using this timescale,time-series analysis of the deposition rate is carried out through the Mesozoic Ordos Basin,which reveals compelling periodicities of 93,33,9,3-5,and 2.4Myr.The radial solar system motions around the galactic centre and plate tectonic cycles act cooperatively to impact the magmatic tempo of the Qinling orogenic belt and the 93-Myr depositional cycle of the Mesozoic Ordos Basin.The Mesozoic 33-Myr cycle is a sedimentary response to the half-period of the solar system’s vertical oscillation about the galactic plane.A rational explanation is that galactic oscillation affects mantle convection,which is responsible for periodic asthenospheric upwelling and ultimately controls the vertical crust oscillation of the Ordos Basin.Mesozoic 9-Myr and the higher-frequency 3-5and 2.4-Myr depositional cycles can be sedimentary responses to the Earth’s orbital eccentricity,which affected the temporal variation in depositional environments in the Ordos Basin.Apart from the galactic-geologic correlations,long-term cycles recorded within a sedimentary basin should also consider the tectonically driven mechanisms at these timescales.This framework provides a new perspective for revealing the astronomical origin of Earth’s rhythms.

关 键 词：Deposition rate Astrochronology Long-term cycles Earth’s rhythm Solar System periodicity 

分 类 号：P512.2[天文地球—地质学] P18