Curie Point Depth From Spectral Analysis Of Aeromagnetic Data In Northeast China

Curie is the temperature interface when the ferromagnetic mineral of the crust rock becomes the papamagnetic substance.. Generally, as the bottom of the magnetosphere in the magnetic exploration, Curie is colse to the deep crustal thermal motion, and plays an important role in the development and utilization of geothermal energy, the forecasting of hydrocarbon resources, the prevention and cure to the earthquake and volcanic eruptions. What’s more, the magnetic anomaly of magnetic based substrated from the aeromagnetic data processing is helpful to the Curie inverstion.This article applies the integrated approach method of aeromagnetic data in Northeast China, aims to the more research on Curie depth inversion method, the main contents including:1. With the comparsion among the model test analysis, interpolation cutting method and wavelet analysis separation present better effect. When the high-frequency interference signal is removed, the wavelet analysis plays a protective role to the useful signal with less lose. Further upward continuation method was added to form a composite filter which can extracte the low-frequency region of the magnetic anomalies caused by magnetic support successfully, and provides a reliable method for the separation of potential field potential field data processing.2. The average depth of Curie isothermal surface is 23 km, which is calculated from the power spectral inversion of the Northeast aeromagnetic anomaly data Describe the magnetic basement relief is described by Parker-Oldenburg-bit field iterative inversion method, the sum of Curie isothermal surface and magnetic basement relief is the Curie.. Magnetic anomaly field distribution inside the home and were revealed in the study area tectonic development of inheritance. In practice, data processing and interpretation work, it should be combined with a comprehensive analysis of a variety of methods in order to obtain more reliable potential field inversion results.3. With the proessing of vertical derivative method,Theta map method,etc. to the Curie inversion result, it infers the correlation of the Curie depth relief trend and discordogenic fault, the dicsussion the crustal thermal structure of state characteristics. The results show Curie ups and downs trend asthenosphere has obvious relevance; binding studies seismic activity, explores the Pacific plate subduction disruption caused by lava and volcanic activity, which led to the Curie surface Long Mechanism.