In the past half a century, with the consumption of resources, the Laochang orefield has entered the rank of resource crisis. In order to alleviate the shortage of mineral resources in the Gejiu tin deposit and prolong the life of the mine, the authors, on the basis of 1∶10 000 tectonic geochemical survey in the study area, analyzed and summarized the geochemical characteristics of 12 elements, used correlation analysis to determine the correlation of elements, used content-area (C-A) fractal method to determine the anomaly threshold, delineated the abnormal range, and then divided the prospecting area.The results show that the 12 elements are highly dispersed, differentiated and enriched in different degrees, among which Pb, Sn, Cu, Bi, As and Cd are the main ore-forming elements in the eastern part of Laochang, Sn and Cu elements have good correlation with Ag, Sb, Zn, Pb, As and Bi elements, and are closely related to mineralization; five prospecting area were delineated, and tin-copper orebodies were found through engineering verification,which shows that the application of tectonic geochemical method in this area can effectively provide scientific basis for the prospecting work.
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