Estimation of Curie Depth of Subei Basin by Magnetic Anomaly  

作　　者：Chaofang Zheng Yixian Xu 

机构地区：[1]School of Earth Sciences,Zhejiang University

出　　处：《Earthquake Research Advances》2021年第S01期35-37,共3页地震研究进展（英文）

摘　　要：The Curie point depth is the depth at which the ferromagnetic mineral loses paramagnetism,which corresponds to a temperature of 550-580 degrees Celsius.This parameter is of great significance for constraining the thermal state of the lithosphere and can be used as an important reference for the evaluation of the prospects for dry hot rock exploration.We use aeromagnetic anomaly radial power spectrum based on the fractal magnetization model to calculate the Curie depth in the Subei Basin.We use the conventional method to preprocess the aeromagnetic data and process aeromagnetic data with selecting the appropriate wave number,domain,window size and fractal parameters to calculate the depth of the bottom of the magnetic source in the Subei Basin,which is approximated as Curie depth.The Curie depth of Subei basin ranges from 18 km to 37 km,with an average Curie depth of 23 km.The Curie depth of Baoying(20 km)and Jianhu(22 km)area is relatively shallow,and that of the surrounding area is relatively deep.In most areas,the Curie depth corresponds to the terrestrial heat flow.

关 键 词：Magnetic Anomaly Curie Point Depth 

分 类 号：P631.2[天文地球—地质矿产勘探]