Application Of Geochemical Baseline In Gold Mineralization Forecast

Daxing'an Mountain range is rich in mineral resources,is a national key metallogenic belt,Delbugan and Daxing'an Mountain range two metallogenic belt across the region,Is the country's 19 key metallogenic belt and one of three important prospecting target.The gold resources in the area are abundant,there are 110 gold deposits in the statistical research area,which accounted for 66% of the gold deposits,34% of the rock gold deposits and associated minerals.The gold deposit mainly formed in the Quaternary period,and the gold deposits mainly formed in Yanshan period between the Jurassic period and the early Cretaceous period.With the deepening of geological prospecting work and the difficulty of finding ore,how to find a gold mine or a large gold mine has become a difficult problem.Based on the geochemical reference value in the project area of Daxing'an Mountain range middle and north section of shallow(0-25cm)and deep(100cm)"sampling data of small scale and low density",using geochemical means,through the comparative analysis of geochemical characteristics and gold element in the study area making geochemical map to understand the geochemical distribution characteristics research gold elements,determine the gold prospecting area.The study found that:(1)the overall low value of Daxing'an Mountain range in the middle and north section of the gold element background,lower than the national sediment and the flood plain sediments in the element background value;(2)the distribution of gold element in deep and shallow layer is not uniform,the distribution of different gold geochemical landscape elements is not uniform.The high value of gold elements in forest swamp background;(3)has been found in about 52% of the gold in the gold fell in the high background area of shallow gold element geochemical map in deep high background area,only 39%,compared to delineate geochemical anomalies for gold is more advantageous to use the shallow layers(4;16)gold anomalies,and the use of related to gold mineralization Ag,As and Hg elements making combination anomaly map,using watershed to delineate anomalies were delineated anomalies 9;(5)cited The concept of contribution rate is evaluated on the combination anomaly,combined with the combination of abnormal size,contrast,strength and the number of gold deposits found within the anomaly,the anomaly is selected to determine the 6 ore prospecting area.