Application of pedogeochemical survey in the Daxintun areaHeihe City and its prospecting effect

Based on the 1:50000 scale regional geological survey in the Daxintun area, Heihe, this study has defined the element anomaly threshold values using pedogeochemical survey, and delineated geochemical anomalies areas, one of which was discovered with intensive anomaly of Au, Ag, As, Sb and Hg. By analyzing the prospecting potential of Au geochemical anomaly and verifyingby trenching, it is found that the abnormal concentration center coincides withorebody, with the long axis direction of anomaly consistent with the trend of orebody. One 900 m-long gold-bearing orebody and two 100 m-long Au-bearingorebodies have been found in the abnormal area, indicating that pedogeochemical surveyhas remarkable prospecting effect in the Daxintun area. Therefore, pedogeochemical survey method can be used in the Daxing’an and Xiaoxing’an Mountains andis worth further promoting in exploration of shallow covered areas.