The Identification Of Geochemical Anomalies And Delineation Of Prospective Mineralization Areas In The Region Of West Kunlun

The Geochemical information is a kind of Micro-mineralized outcrop, it can provide directly information for mineral exploration to improve the efficiency of prospecting. The research area is located in the territory of West Kunlun region of Tibet, and location of Geotectonic belong to the convergence zone of South Kunlun Block, Karakoram Block, Hoh Xil Block and North Chang Tang Block. Because of the complex geological background, many geochemical anomalies of Copper-polymetallic ore, poor research status and the only-showed mineralization information of metal ores, the essential of mineral exploration is how to riddle and evaluate these anomalies scientifically and reasonably.Based on the analysis of regional mineralization's geological background, this thesis researched and evaluated the distribution feature of regional geochemical datum , the geochemical background, the classification of anomalies, the extraction and screening of geochemical anomaly information and the mineral exploration potential of these anomalies in West Kunlun.It was found in the research that the content of stream sediment's instruction elements matched a multimodal distribution or approximate lognormal distribution, but not the normal distribution or lognormal distribution, the geochemical background of the stream sediment approached geological cells of underlying bedrock closely which had different values of geochemical background.The major formations which is important to mineral exploration potential in the research area are Tunlonggongba Fm(C2-P1t), Bayan Har Mountan Gr(Tb),Yanshiping Gr(Jy)and Tielongtan Fm(K2t).Based on processed the raw data of sediment's instruction with the scale of 1:200,000 and delineated every contrast anomaly of all the elements respectively with the two methods of"subinterval area median contrast filtering method"and"subinterval area anomaly threshold contrast filtering method", the overlap anomaly contrasts from the two methods were took as a new anomaly border to re-delineate a single-element anomalies'map and a multi-elements anomalies'map.Depend on the characteristics of exceptional elements grouping, exceptional concentration and exceptional intensity, exceptional area, exceptional continuity, exceptional intensity of multi-elements grouped contrast values and the ability of indicate elements mineralized individually, the author filtered 35 places of integrated anomaly with 9 of A type exception, 12 of B type exception and 14 of C type exception. The author also ordered the mineralization possibilities of every anomaly area for being priority selected when it was needed to check the anomalies further.It was researched out that the elements of Cu, Pb, Zn, Sn, W, Au and Sb had a super concentration phenomena in the major geochemical anomaly areas. The job of exploration should be focused on the deposits of Porphyry copper, Hydrothermal copper-polymetallic ore, Hydrothermal Pb-Zn ore, Granite-type tungsten tin ore, Hydrothermal Sb ore and lode gold.