Subduction hydrothermal regime and seismotectonic variation along Kermadec-Tonga megathrusts
Description
The data include the 3-D temperature field (degrees Celsius), water content (wt%), dehydration rate (wt%/km), and subduction velocity field (cm/yr) of the subducting plate, as well as the coastline and volcano distribution in Kermadec-Tonga. The data coordinates are an orthogonal coordinate system. The data of the model region have dimensions of 800×1800×400 km (length×width×depth). The geometry of the subducted plate is well constrained by Slab2.0, and the plate ages are provided by EarthByte. The temperature boundary condition agrees with the plate cooling model. The bottom of the slab and the perpendicular plane are prescribed as adiabatic and permeable, and the top surface is set to a fixed temperature (0°C) and is rigid. The data was acquired through 3-D numerical thermal modeling which was developed from originally code stag3d. An anelastic liquid approximation and the equations of conservation of mass, momentum, and energy are used in this model. Based on a three-dimensional thermomechanical model and the collect earthquake catalog from IRIS, the data of the slab thermal state, water content, and slab dehydration distribution in Kermadec-Tonga are calculated. The geophysical calculation is ensured after the subduction thermal regime reaches a steady state. The temperature field error range is ± 50 degrees Celsius, and the velocity field error range is ±0.1cm/ yr. This data can be further used to analyze the geophysical field of the subduction zone.
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Steps to reproduce
The data includes the three-dimensional slab temperature field (degrees Celsius), water content (wt%), dehydration rate (wt%/km), and subduction velocity field (cm/yr) of the subducting Pacific plate, as well as volcano distribution in Kermadec-Tonga. The data coordinates are an orthogonal coordinate system, in kilometers. The data source method is a three-dimensional finite-difference numerical simulation. The geophysical calculation is ensured after the subduction thermal regime reaches a steady state. The temperature field error range is ±50 degrees Celsius, and the velocity field error range is ±0.1cm/ yr. This data can be further used to analyze the geophysical field of the subduction zone.