Abstract
Porphyry is an important basis for delineating the smallest prospecting area in resource potential evaluation of the porphyry copper deposit.Studies show that many remote sensing circular structures have a relationship with the magmatic activity(including porphyry).In order to evaluate ore potential of the porphyry copper deposit rapidly,the authors made ore prognosis in the Yulong-Malasongduo porphyry copper ore district by using remote sensing technique.Firstly,on the basis of ETM+ images,the circular structure indicators were established.Then,the circular structures in the study area were interpreted,the distribution characteristics of circular structures were summarized,and the deductive indicators of porphyry from circular structures were determined.The results show that circular structures can offer an important clue to delineating the smallest prospecting area of the porphyry copper deposit.
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