Earth’s tectonic and plate boundary evolution over 1.8 billion years  

作　　者：Xianzhi Cao Alan S.Collins Sergei Pisarevsky Nicolas Flament Sanzhong Li Derrick Hasterok R.Dietmar Müller 

机构地区：[1]Frontiers Science Center for Deep Ocean Multispheres and Earth System,Key Lab of Submarine Geosciences and Prospecting Techniques,MOE and College of Marine Geosciences,Ocean University of China,Qingdao 266100,China [2]Tectonics and Earth Systems&Mineral Exploration Cooperative Research Centre,School of Physics,Chemistry and Earth Sciences,The University of Adelaide,Adelaide,SA 5005,Australia [3]Earth Dynamics Research Group,School of Earth and Planetary Sciences,Curtin University,WA 6845,Australia [4]Environmental Futures,School of Earth,Atmospheric and Life Sciences,University of Wollongong,Northfields Avenue,NSW 2522,Australia [5]EarthByte Group,School of Geosciences,The University of Sydney,NSW 2006,Australia

出　　处：《Geoscience Frontiers》2024年第6期429-453,共25页地学前缘（英文版）

基　　金：Shandong Outstanding Youth Science Foundation(China)(2023HWYQ-065);Taishan Scholar Program(China)(tsqn202306114);National Key R&D Program of China(2022YFF0800401);ASC acknowledges funding through Australian Research Council projects LP210200822,LP200301457,FT120100340,FL240100114 and the MinEx CRC;His contribution forms MinEx publication#2024/37;SL is funded by National Natural Science Foundation of China(Nos.42121005,91958214);Shandong Provincial Natural Science Foundation(China)(No.ZR2021YQ25);the Marine S&T Fund of Shandong Province for Laoshan Laboratory(No.2022QNLM050302);SP was supported by the Australian Research Council Laureate Fellowship grant to Z.X.Li(FL150100133);This study is a contribution to IGCP 648.NF acknowledges funding through Australian Research Council projects LP220100056 and FT230100001。

摘　　要：Understanding the intricate relationships between the solid Earth and its surface systems in deep time necessitates comprehensive full-plate tectonic reconstructions that include evolving plate boundaries and oceanic plates.In particular,a tectonic reconstruction that spans multiple supercontinent cycles is important to understand the long-term evolution of Earth’s interior,surface environments and mineral resources.Here,we present a new full-plate tectonic reconstruction from 1.8 Ga to present that combines and refines three published models:one full-plate tectonic model spanning 1 Ga to present and two continental-drift models focused on the late Paleoproterozoic to Mesoproterozoic eras.Our model is constrained by geological and geophysical data,and presented as a relative plate motion model in a paleomagnetic reference frame.The model encompasses three supercontinents,Nuna(Columbia),Rodinia,and Gondwana/Pangea,and more than two complete supercontinent cycles,covering40%of the Earth’s history.Our refinements to the base models are focused on times before 1.0 Ga,with minor changes for the Neoproterozoic.For times between 1.8 Ga and 1.0 Ga,the root mean square speeds for all plates generally range between 4 cm/yr and 7 cm/yr(despite short-term fast motion around 1.1 Ga),which are kinematically consistent with post-Pangean plate tectonic constraints.The time span of the existence of Nuna is updated to between 1.6 Ga(1.65 Ga in the base model)and 1.46 Ga based on geological and paleomagnetic data.We follow the base models to leave Amazonia/West Africa separate from Nuna(as well as Western Australia,which only collides with the remnants of Nuna after initial break-up),and South China/India separate from Rodinia.Contrary to the concept of a“boring billion”,our model reveals a dynamic geological history between 1.8 Ga and 0.8 Ga,characterized by supercontinent assembly and breakup,and continuous accretion events.The model is publicly accessible,providing a framework for future refinements and facilitating deep

关 键 词：Plate reconstruction Nuna SUPERCONTINENT PROTEROZOIC PALEOGEOGRAPHY 

分 类 号：P542[天文地球—构造地质学] P59[天文地球—地质学]