Surface erosion events controlled the evolution of plate tectonics on Earth
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View abstract on PubMed
Summary
This summary is machine-generated.Plate tectonics evolved with continental growth and sediment accumulation, which lubricated subduction zones. Major tectonic events followed global glaciations, driving supercontinent formation and modern plate activity.
Area Of Science
- Geology
- Earth Science
- Tectonics
Background
- Plate tectonics is a fundamental Earth process, yet its origins and evolution are not fully understood.
- Understanding the development of plate tectonics is key to comprehending Earth's geological history.
Purpose Of The Study
- To investigate the emergence and evolution of plate tectonics on Earth.
- To propose a model for the development of plate tectonics driven by continental and sedimentological changes.
Main Methods
- Extrapolation of present-day plate tectonic models to past geological periods.
- Analysis of the role of continental rise and sediment accumulation in subduction lubrication.
Main Results
- Continental growth and sediment accumulation since 3 billion years ago likely provided lubrication for subduction, crucial for plate tectonics.
- Significant surface erosion and subduction lubrication events occurred post-Huronian and post-Snowball Earth glaciations, influencing supercontinent formation (e.g., Columbia).
Conclusions
- The 'boring billion' period of reduced tectonic activity may have resulted from sediment shortfalls in trenches.
- The Neoproterozoic 'snowball' Earth glaciation is proposed to have re-initiated active plate tectonics.
- Sedimentation and erosion dynamics are critical factors in the long-term evolution of plate tectonics.
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