Dataset of "Lithospheric magnetization derived from petrological and satellite constraints"

This repository contains all algorithmic codes, theoretical model test data, and real-world data processing results associated with the manuscript entitled “Lithospheric magnetization derived from petrological and satellite constraints”. The abstract of the paper is provided below to offer a rapid overview of our work. To compile and run the source code provided in this repository, please download the Docker image file `gctl_toolkits_amd64_v2.1.tar` from https://gofile.me/5wW03/3BRW626ho, which contains all necessary dependencies for building the code (I tried to upload it here and failed. Maybe it is too large to go through). Import this image into Docker and create an interactive container; compilation should then be performed within the container using CMake. Detailed instructions for program usage—such as configuration file formats and parameter settings—must be deduced directly from the source code, as we currently have no plans to package the code into a formal software tool or to publish comprehensive documentation. Abstract The global distribution of the Earth’s lithospheric induced magnetization is examined through an inverse modeling approach that integrates constraints from both petrological data and satellite magnetic observations. The distribution of induced magnetization is characterized by the Vertical Integrated Susceptibility (VIS) of a spherical equivalent source layer. To reconstruct the long-wavelength structures of the lithospheric magnetic field, a prior petrologically derived VIS model (SM3-SI) is utilized to provide constraints at spherical harmonic degrees 0–16, while finer structures are constrained by satellite magnetic data. The resultant VIS model furnishes a higher-resolution and more accurate depiction of lithospheric induced magnetization. Significant variations in the resultant VIS model across different crustal types and basement ages are confirmed through a comprehensive analysis. High lithospheric magnetization is generally observed in Precambrian provinces characterized by cold and thick lithospheres, whereas orogenic belts and extended crustal regions exhibit lower magnetization due to reduced magnetic materials from crustal thinning. The low magnetization in Paleozoic regions is interpreted to partly reflect secular changes in crustal composition. In oceanic regions, elevated lithospheric magnetization is mainly concentrated in oceanic plateaus which are associated with Cretaceous magmatic activity. Mantle-derived magnetic sources, which are related to an increased Curie depth caused by the cold subducted slabs and the serpentinization within the mantle wedge, are inferred to underlie the strong magnetization observed in island arcs and subduction zones.