1:50000 Stream Sediments Geochemical Anomalies Study In The Zanzon Lake Area Of Shuanghu Country,Tibet

Zanzong Lake Area at Duo Ma township in Shuanghu County,is located in the southern margin of the Qiangtang Basin,Tibet.It is middle of famous Bangong Lake-Nujiang metallogenic belt.It is complex that the geological structure of Bangong Lake-Nujiang metallogenic belt,and forming ore conditions were favorable.The belt has a good metallogenic geological condition for forming copper polymetallic ore and is a key polymetallic ore belt in China.As the geographical environment is very poor in the study area,high altitude,the traffic is very inconvenient.The more geological research work was mainly used for comprehensive research in the past,the basic geological survey and scientific research is less,previous work involved in the study area geochemical exploration for I:200000 regional scans,the research of geology and mineral resources in the area survey work is weak,no system of geology and mineral resources investigation work,the overall research level is low.The regional geological survey and stream sediment survey of 1:50000 in the middle scale geological prospecting work was the first time within the scope of the study area.The paper combined with the geological background in the study area,15 kinds of elements Au?Ag?Cu?Pb?Zn?As?Sb?Bi?Cd?W?Mo?Sn?Cr?Co?Ni were been studied object.The geochemical anomaly information of every element were been recognition and extraction.The abnormality level and the evaluation were performed on single element abnormality,combined element abnormality and comprehensive element abnormality.In this paper,use MAPGIS and Surfer software to analyze geochemical data of different elements,generate the geochemical contour map and the equivalent area map,On this basis,using one or two and fourth times values of anomaly threshold,we can divide into three level of concentration zoning,that were besides zone,middle zone and inner zone.on anomaly threshold to map the geochemical anomaly map,they display element geochemical anomaly characteristics and distribution laws.By using the SPSS software to analyze and deal with the spatial distribution of element anomalies in the study area and their respective correlations,We found the Cu-Co-Ni-Zn-Cr composite anomaly?Au-Ag-Mo composite anomaly?Pb-Bi-W-Sn composite anomaly?As-Sb-Cd composite anomaly and other four combinations of anomaly.The anomalous distribution of Cr-Cu-Co-Ni-Zn is mainly controlled by strata and faults,and it is distributed along the fault junction or strata,and the anomalies are continuous and the individual anomalies are larger.Based on the analysis of the geochemical anomalies of the 15 elements,a total of 9 comprehensive anomalies were found on the basis of the anomalies of the single elements.The anomalies were highly consistent with the known mine beds,providing a large amount of prospecting information for the mineral prospecting.Finally,by all the consideration of element anomaly combination,the correlation between each element,the symbiotic and association associated characteristics and the spatial relationship of anomalies and geological background,the region was divided into five prospecting areas.Among them,a large number of malachite petrochemicals were found in the Angwu Mountain of the class B-1,which indicated that the prospecting area more likely possesses a ore-forming potential of Cu element;The prospecting potential of the chromite?magnetite and peacock petrochemical is found in the class B-2 prospective area,which shows a ore-forming potential of Cu?Cr and other metallic mineral.It is found by study that the concentration of Cr?Ni?Cu?Co and Au are higher in the main geochemical anomaly area,we should focus on these minerals in the future the exploration work in the area.