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

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外文摘要：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 con-strained by geological and geophysical data,and presented as a relative plate motion model in a paleo-magnetic reference frame.The model encompasses three supercontinents,Nuna(Columbia),Rodinia,and Gondwana/Pangea,and more than two complete supercontinent cycles,covering-40％of the Earth's his-tory.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 kinemat-ically 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 paleomag-netic 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/lndia 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 time studies of Earth's system.We suggest that the model can serve as a valuable working hypothesis,laying the groundwork for future hypothesis testing.

外文关键词：

Plate reconstructionNunaSupercontinentProterozoicPaleogeography

作者：

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

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作者单位：

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

Tectonics and Earth Systems & Mineral Exploration Cooperative Research Centre,School of Physics,Chemistry and Earth Sciences,The University of Adelaide,Adelaide,SA 5005,Australia

Earth Dynamics Research Group,School of Earth and Planetary Sciences,Curtin University,WA 6845,Australia

Environmental Futures,School of Earth,Atmospheric and Life Sciences,University of Wollongong,Northfields Avenue,NSW 2522,Australia

EarthByte Group,School of Geosciences,The University of Sydney,NSW 2006,Australia

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出版年：

2024

DOI：

10.1016/j.gsf.2024.101922

地学前缘(英文版)

中国地质大学（北京）北京大学

地学前缘(英文版)

CSTPCD

影响因子：0.576

ISSN：1674-9871

年,卷(期)：2024.15(6)