Integrated magnetic data processing for delineating deep mineral deposits: A case study from Daye Iron Mine

摘要

We present a new integrated data processing solution for the magnetic surveys in searching for deep mineral deposits. First, the vertical component AZ collected before exploitation is transformed to its total field anomaly AT, and compared with the AT anomaly obtained after exploitation. Thus the deep ore deposits can be deduced from the time-varying characteristics of AT with the full utilization of the old magnetic data. Then, the magnetic anomaly is decomposed by the wavelet multi-scale analysis tool, combining with power spectrum analysis to determine depths of different scales. Therefore, the weak signals of deep minerals can be extracted to estimate their existence. At last, the 3D visualized inversion of arbitrarily shaped bodies is conducted for detailed interpretation. One application in Daye Iron Mine indicates that, there maybe deep iron ore deposits at the depth of 800 to 1000m, which had been verified by recent drilling.