Application Of Geophysical And Geochemical Data For Exploration In Fuxili Area Of Daxinganling

Fuxili area is located in Xinlin District of Daxinganling Mountains, in the northof Heilongjiang province. Fuxili area is in Cu-Mo-Au-Fe-Zn metallogenic belt ofDuobaoshan-Heihe. Gulch-gold resources are abundant and have found large gravelmine such as Wolegen River, Xinglonggou, Fuxili in the early stage, and the only rockgold deposit is Walali-Heilonggou found in the80’s. Study area is a typicalmiddle-low mountain forest-bog landscape with thick vegetation cover, and rock goldprospecting has been no big breakthrough.Based on the1/50000regional geological survey of Fuxili area, optimized1/50000stream sediment HS-15, HS-16anomalies in the upper reaches of Kunasen Riveron the west side, methods of the1/20000soil geochemical measurement,1/20000ground high precision magnetic measurement,1/20000IP intermedicate gradientsurvey and IP sounding were applied for prospecting.Through the comprehensive prospecting and research, two high magneticanomalies, four apparent resistivity anomalies, five apparent polarization anomaliesand seven soil anomalies were designed. Thereinto, Au-2, Au-5, Au-6soil anomalies,ρs-3abnormal and ηs-3anomaly own good ore-forming conditions for being gold andpolymetallic deposit prospecting target area.Through carried trenching work on theset parts of geophysical and geochemical anomaly, the east Kunasen Mount gold andsilver mines were discovered. One gold-silver deposit was found in Au-6soil anomalyby analyzing of channel sampling, with the gold grade of1.17x10-6and silver grade of2.13x10-6. One mineralized alteration zone was discovered in Au-2soil abnormal inhigh value point, in which one gold ore was found. According to the result of IPsounding, lay out of drill hole respectively in the112line and120line to control deeplythe mineralized alteration zone, and discover the gold grade up to1.95x10-6in the14.54-15.54m in the borehole of ZK11201.Another mineralized alteration zone was detected in Au-5soil abnormal, and one gold orebody was found within it, with theaverage value grade of0.26x10-6and the highest grade of0.38x10-6.The study illustrates the feasibility of soil geochemical measurement andgeophysical methods for gold and muti-metal ore exploration in forest-swamplandscape shallow coverage. Fuxili area has a good prospecting potential, and worthyof in-depth study in future work.