| Soil mobile metals elements survey is a new geochemical exploration technique in recent years.In this thesis,Dong'an gold mine in County Xunke,Province Heilongjiang was put into experimentandapplication.Dong'an gold mine,located in thesouth of Heilongjiang and the north of Little Xing'anling,is a forest-swamp geochemical landscape.There is a higher probability to prospect and explore in this area.33.4 tons of Auand 254.5 tons of Aggold reserves have been proved in this area.Ore body No.5,accounting for 69%of the entire resources/reserves,is the largest one with Au 23.6 tons and Ag 200.395 tons.This experiment developed 1:25000 Geochemical soil survey in the routine methods,making some prospecting effects and delineating soil geochemical anomalies of Au associated with metallogenic.However,these anomalies are in correspondence to the outcrop area of gold mine body with bigger interference from overburden.Meanwhile,this experiment adopted a new way to develop1:25000 Soil mobile metals elements survey,and achieved better geochemical anomalies of mobile forms substance of Au——Au~M——in accordance with elements like Au of deposit.These anomalies are lower in influence from land mulch.Ore body No.5 is 1500 meters long in ore vein;Four places anomalies of Au mobile element,in a chain of pearls,were delineated,which distributed along No.5 ore vein evenly from south to north and had a higher anastomosis degree with ore vein.This experiment proved a successful survey technique and method,which accumulated experiences and evidence for the application of this technique. |
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