This groundbreaking research offers a comprehensive reconstruction of Earth’s tectonic evolution from 1.8 Ga to the present, bridging critical gaps in pre-Pangean plate dynamics. By merging three existing models and refining pre-1.0 Ga configurations, the study integrates paleomagnetic constraints, metamorphic records, and accretionary histories to map evolving plate boundaries and supercontinent cycles. The model highlights Nuna’s assembly (1.6 Ga) and breakup (1.46–1.3 Ga), Rodinia’s formation (930 Ma), and Gondwana-Pangea transitions, emphasizing continuous subduction and accretion rather than tectonic quiescence during the Mesoproterozoic.
Methodologically, the work combines continental drift patterns with synthetic oceanic plates, using GPlates software to ensure kinematic consistency. Key innovations include revised timings for cratonic collisions (e.g., Australia-Laurentia at 1.6 Ga) and refined paleolongitudinal adjustments. The model reveals root mean square plate speeds of 4–7 cm/yr for pre-1.0 Ga, aligning with Phanerozoic rates, except for rapid motions (~20 cm/yr) linked to true polar wander at 1.1 Ga. These findings reconcile geological evidence with quantitative plate rules, offering testable hypotheses for deep-time mantle-surface interactions.
By challenging the notion of a stagnant “boring billion,” this study underscores Proterozoic tectonic vitality, with implications for mineral resource distribution, biogeochemical cycles, and mantle convection patterns. The open-access model provides a foundational framework for future refinements, enabling interdisciplinary research into Earth’s co-evolving geodynamic and surface systems over supercontinent cycles. The work entitled “Earth’s tectonic and plate boundary evolution over 1.8 billion years” was published on Geoscience Frontiers (published on Aug 31, 2024).

DOI：https://doi.org/10.1016/j.gsf.2024.101922