Application of the Comprehensive Geophysical Method in Rapid Evaluation of Ore Prospecting Target Areas

Mineral exploration work in China has already stepped into a stage of attacking deep layer to find hidden ore bodies.And the ore-forming geological conditions,the geological features of ore deposits,and the terrain of deposit locations are complex and varied.A set of geophysical exploration methods has been integrated on the basis of electromagnetic plane measurement,sounding technologies,supplementing by magnetic and geochemical exploration technologies to rapidly evaluate the prospecting target areas with limited exploration history,and then it is possible to provided useful information on further exploration scheme designing.We have used a comprehensive geophysical exploration method in more than 40deposits(occurrences).In this paper,three cases,Xiaogou iron deposit that controlled by intrusion,the Baiyingtala lead-zinc-silver ore occurrence and the Yunshan gold deposit that controlled by fracture zones,have been described as examples.It has been revealed by the geophysical methods that the unique morphology,the occurrence and the scale of the anomalies are consistent with the intrusion and fracture zones.Combined with geological studies,it is suggested that these anomalies could indicate intruded channels,high magnetic bodies and ore structures.Although ore prospecting is difficult,the set of regional applicable mineralization prediction theory and forecasting technology discussed in the paper have an important promoting role in regional prospecting.