The Model of China's Copper Grade——Tonnage and the ResourceAppraisal Technique

On the base of the national copper reserves data up to the end of 1999, the authors have studied the distribution characters of the copper grade-tonnage model of various metallogenic types and concluded that the porphyry copper deposits of China are characterized by a fractal distribution. Based on researches of the copper grade-tonnage model, the authors have integrated the MARKS method to the Mineral Resource Appraisal System (MRAS), and calculated the various types of copper resource.