Regularity of Searching for Porphyry Copper Deposit in Tuwu-Yandong Area——The research of prospection model of “three tall and two corresponde nces and one correlation”

Using induced polarization method,magnetic method,and gravity method,we estimated the copper mineralization in East Tuwu-Yandong area and found the out cropped porphyry copper deposit in this area.After the task of area geophysical prospecting,we proposed the "three in one" pattern.Having completely and systematically studied the regularity of sear ching for the copper deposit,we established the so called "three-high two-correspondence one-correlation" ore-searching model.The "three-high" are that,1)the high polarization body directly reflects the sulphide belt on both flanks of porphyry copper deposit and indirectly reflects the included copper ore in the sulphide belt,2)the high magnet directly reflects diorite and indirectly reflects mineralizing parent rocks-plagioclase granite porphyry,and 3)the high local gravity mainly reflects diorite including the porphyry body;The porphyry body corresponds to the contact zone between high occurrence and low resistivity,also corresponds to the contact zone between high occurrence and low magnetic;porphyry copper deposit is mutually related to volcanic layer.On this basis,we used the prospecting model of "three-high two-correspondence one-correlation" for the hidden ore body in Yanxi area and,at last,discovered the hidden porphyry copper deposit.Having analyzed the relevant data,we thick that both Yanxi and Yandong area have a prospect for further searching ore deposit.