Magnetic anomaly characteristics and crystalline basement variation of the Qinling orogenic belt and its adjacent areas

According to the latest high precision geomagnetic combine with 1 :100000 and 1 :200000 aeromagnetic data across the Southern Ordos Basin-Weihe Basin-Qinling-Daba orogenic belt-Northeast corner of Sichuan Basin, Scilicet the Yulin-Xianyang-Wanyuan-Fulingcombined geophysical profiles, analysed the pattern of magnetic anomaly field, constructed partition and crystalline basement fluctuation characteristics of the study area through data processing and inversion. The result shows that there are obvious differences between different tectonic units. Southern Ordos Basin magnetic anomaly is relatively stable, As it has uplifted and been denudation due to Yanshan movement, crystalline basement is relatively shallow; The Weihe basin and Northeastern of Sichuan Basin have received long-term sedimentation, crystalline basement is relatively deep; The Qinling-Daba orogenic belt magnetic anomaly severe beating, and as it has experienced a long-term collision, estrusion and intracontinental orogenesis, the distribution of stratum and lithology and structure is very unequilibrated, interchanging and migration of substance and energy is present in deep. The results provide very important basis for the further understanding of the deep structures and the pattern of the deep kinematic and kinetic processes and deep resource perspective of the study area.