Stream sediment geochemistry and prospecting prospect in Dachebeigou area of Jilin Province

The Dachebeigou area of Jilin Province is located in the southern margin of eastern Xing'an-Mongolia orogenic belt, geochemically belonging to Changbai Mountain forest swamp landscape area. There are 76 mineral deposits such as Erdaodianzi Au deposit, Xingfu Sb deposit and Piaohechuan Cu-Ni deposit discovered in and around the study area, with good prospecting prospect. The correlations, enrichment-depletion characteristics and combination features of elements, as well as the prospecting potential of major elements, are ascertained based on the content data of 17 elements by the 1:50 000 stream sediment survey. Combined with regional geological background and 1:200 000stream sediment survey data, it is considered that Au, Cu, Ni and Sb are the main metallogenic elements, and their geochemical anomalies are well-matched. According to the metallogenic conditions of the area, 25 comprehensive anomaly areas and 2 prospecting prospective areas are delineated, which provides basis for further prospecting work.