The adverse effect of oblique magnetization on magnetic survey data has been a difficult problem for geologists engaged in magnetic survey. In the aspect of eliminating oblique magnetization

the previous method has been used to process magnetic data

but the method has some limitations in the low latitude magnetic measurement environment. In contrast

gradient tensor eigenvalue class method can show great advantages in the processing of magnetic measurement data

because gradient tensor eigenvalue has the superior property of not being affected by magnetized dip angle

and can efficiently process field oblique magnetization magnetic measurement data. Based on the excellent characteristic of gradient tensor eigenvalue

the eigenvalue modulus method is proposed

which is not only not affected by magnetization angle

but also can directly process the magnetic data collected in the field

which is of great value and significance in the actual mineral production and exploration.