Dual hydration of oceanic lithosphere
Fan Zhang1,2, Jian Lin2,1,3, Rixiang Zhu4
1Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, China.
National Science Review
|October 30, 2023
Summary
Global oceanic lithosphere hydration is quantified, revealing subduction zones are vital for plate dynamics and Earth's water cycle. This research highlights essential water input for geological processes.
Area of Science:
- Geophysics
- Geochemistry
- Earth Science
Background:
- Oceanic lithosphere plays a critical role in Earth's geochemical cycles.
- Understanding water input into the lithosphere is key to plate tectonics.
- Previous estimates of water budgets were limited in scope.
Purpose of the Study:
- To quantitatively estimate the water input budget of the global oceanic lithosphere.
- To analyze these budgets across various tectonic settings.
- To determine the significance of hydration in subduction zones.
Main Methods:
- Quantitative estimation of water input.
- Analysis of lithospheric hydration.
- Comparison across different tectonic settings.
Main Results:
- Water input budgets for oceanic lithosphere were successfully estimated globally.
- Significant variations in hydration were observed across tectonic settings.
- Subduction zones show fundamentally high water input essential for geological processes.
Conclusions:
- Hydration at subduction zones is a critical control on plate dynamics.
- Subduction zone hydration is a key component of Earth's global water cycle.
- Accurate water budget estimations are vital for understanding mantle processes.
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