Analysis Of The Geochemical Characteristics Of Uranium And Thorium Of 1:50000 Stream Sedimentin Haizi Mountainarea,Sichuan Province

The studing area is located in the south of the southwest Sanjiang metallogenic belt.Based on the research results and geological data,the U,Th element distribution,distribution characteristics,U and Th anomaly provenance are analyzed,combined with the former metallogenic theory and geological background,the u and th metallogenic prospect area,and the deployment of ore prospecting in the region.Through the water stream sediment survey,10 anomalies were delineated,in which U element 7 and Th element 3.The abnormal distribution rule is analyzed.the main anomalies of U and Th in the study area are distributed in the contact zone of granite and stratum,and the control action of rock mass is obvious.According to the geochemical characteristics of U and Th,combined with the topography and geological background,the geochemical behavior characteristics of U and Th are analyzed.the results show that U and Th content of water system sediments U and Th decrease gradually,U/Th ratio basic synchronous change.The source regions of u and th geochemical anomalies are studied.Using the U and Th ratio of rock to determine quantitatively the uranium content(U)and the original uranium content(Uo),and calculate the recent change coefficient of uranium(?U)in Rongyicuo rock,the results show that the original uranium content is relatively high,stand up for 3.36×10-6 ~ 14.03×10-6,average 9.81×10-6.In addition,the ?U change is larger(-25.89%~-42.35%),but mainly for the modern uranium is taken away,which can fully prove that the Rongyicuo cashmere granite body as sediments HaiziMountain area U with abnormal activity of uranium source.The Concentration coefficient,variation coefficient and enrichment coefficient of ore-forming elements in the study area are analyzed.It is considered that the study area has the characteristics of high background value,strong element differentiation and good enrichment,and the metallogenic potential is great,but in the geological units of study area.Among them,U elements show good Concentration and differentiation characteristics,the bond zone area and the adjacent area have known mine types and mineralization background,the prospect of looking for uranium deposit is better,the main attack deposit type is granite type uranium deposit.The geological unit ore-bearing potential is analyzed.The results show that the geological unit of the ore-bearing potential in the study area is in the range of the Triassic tumugouzu and the first stage of the intrusive rock mass distribution in the Triassic tumugouzu,reflects the intrusion of magmatic hydrothermal fluid in the first stage of Yanshan,and finally enriched the Triassic tumugouzu,indicating the metallogenic role of the times and strataboundness.On the basis of the above study,the metallogenic prospect of the area is evaluated,two looking for,1 grade b and 1 grade c.From the south to north,two metallogenic prospective areas are Ena-Chige U and Th prospecting area and Qiongda HaiziMountainU-Th prospecting area,which provide more detailed information for the future Prospecting work.