THE APPLICATION OF THE INTEGRATED GEOPHYSICAL CHARACTERISTICS OF PINGTAI MAGNETIC ANOMALIES TO THE DEDUCTION OF ORE GENESIS

In this paper,geological environments,ore-control conditions,ore body shape characteristics and utilization values of contact-metasomatic type,hydrothermal type and sedimentary-metasomatic type iron deposits are discussed briefly.Based on studying the Za-Ha double component parameter diagram and the inverse fitting of Pingtai magnetic anomaly,the authors hold that Pingtai anomaly is likely to indicate a magnetic body with steep attitude.The gravity and magnetic correspondence analysis shows that the Pingtai gravity anomaly and the magnetic anomaly are not of the same source,and Pingtai anomaly is not the manifestation of a sedimentary-metasomatic type iron deposit.According to the CSAMT results,the evidence of magmatic activity in Pingtai area was found,so that there exist some necessary conditions for the formation of contact-metasomatic type and hydrothermal type iron deposits in Pingtai abnormal area.Comprehensive geological-geophysical data suggest that Pingtai anomaly is the product of a contact-metasomatic type and hydrothermal type iron deposit.