| Gaoshishan area is located on the Chinese side of the border between China and Mongolia in the northwest of Inner Mongolia Autonomous region,and the administrative division is under the jurisdiction of Saihantaolai Sumu,Ejina Banner of Inner Mongolia Autonomous region.The metallogenic belt is located in the Paleozoic island arc volcanic belt of the northeastern Tarim plate,the northern mountain metallogenic area,the middle section of the Heyingshan-Yagan iron,copper,gold,molybdenum metallogenic belt.The geological and aeromagnetic data show that it is located in the same metallogenic belt as the Yandong Tuwu large copper deposit in East Tianshan,Xinjiang,and is part of the Paleo-Asian Ocean metallogenic domain.Gaoshishan area has good metallogenic geological conditions and metallogenic geochemical basis,which is a good area for further exploration of subvolcanic type,hydrothermal altered rock type,porphyry type copper deposit and gold deposit,and has a good prospecting prospect.However,in recent years,a large number of geological survey work in Gaoshishan area has made progress,but there is no great breakthrough,and the regularity is not strong.In this paper,on the basis of combing and summarizing the regional metallogenic geological conditions in the study area,we use the theory of multi-dimensional anomaly system to evaluate the anomalous characteristics of S,Fe2O3,Na2O,metallogenic elements and accompanying elements in Gaoshishan area.Based on the comprehensive analysis of the multi-attribute and multi-level geochemical characteristics of the study area,there are 7 prospecting targets in Gaoshishan area.The large scale geological,geophysical and geochemical prospecting work has been done in the target area of No.1 Prospecting area.The results show that there are6 valuable geochemical anomalies in the target area,and 6 mineralization alteration zones and one copper polymetallic ore spot were found in the preliminary investigation of anomalies.It has been found that the geological sign of the target area in the Gaoshishan area is the Gongpoquan formation or its contact zone with the intrusive body.The geochemical sign is mainly characterized by sulfur rich elements,and obvious anomalies of metallogenic elements appear on the premise of negative anomalies of Na2O and other elements in sulfur-rich geological bodies.The selection of prospecting targets is mainly based on the results of surface detritus survey.The general principle is based on the characteristics of multi-attribute anomalies in the study area,on the basis of the geological conditions of the areas where the anomalies occur,and guided by the theory of multi-dimensional anomaly system.Taking the possible metallogenic geological body as the key target and taking the multi-attribute comprehensive anomaly as the direct mark,the ore prospecting target area is gradually selected and delineated from the metallogenic premise,ore-forming intensity,metallogenic material and so on.The method of using geochemical multi-dimensional anomaly to select target area in Gaoshishan area is feasible and reasonable.It plays a leading and exemplary role in delineating prospecting target area and predicting metallogenic prospect by geochemical method. |
