THE APPLICATION OF GRAVITY SURVEY TO IRON DEPOSIT PROSPECTING

The inspection of the aeromagnetic anomalies in eastern Hebei Province shows that the magnetic survey data are very effective in search for magnetite deposits at relatively shallow depth;nevertheless,these data have obvious limitations when they are used to deduce attitude and buried depth of an ore body according to the magnetism because of the error of reduction to the pole and the weathering crust.So the gravity exploration technique can play an important role in the iron ore exploration.The correct utilization of gravity-magnetic comprehensive methods can yield satisfactory ore-prospecting results in the work of iron ore exploration.