The geological anomaly unit method (GAUM) is a new way to delineate and evaluate ore-finding targets in line with the “geological anomaly ore-finding theory”. Comprehensive ore-finding information from geological, geochemical and geophysical data is used for quantitative measurement of the “ore-forming geological anomaly unit” in this paper. The main procedures are shown as follows: (1) The geo-anomalous events associated with gold mineralization are analyzed in Tongshi gold field; (2) The zonation in the concentrated heavy minerals and the stream-sediment elements of ore-forming geo-anomaly are studied in detail; (3) The deep geological structural framework is deduced by means of the synthetic geological interpretation of gravity and magnetic information;(4) The ore-controlling geo-anomalies and ore anomalies are chosen as the variables of the favorable ore-forming indexes that can be used for the quantitative delineation and evaluation of the potential ore-forming regions.