Geochemical Characteristics Of Soil And Prospecting Prediction Of The Guliku Gold And Silver Deposit Of The Songling District Of Daxinganling Region In Heilongjiang Province

The study area is located in the eastern margin of the Daxinganling volcanic rock belt and in bordering zone between Dayangshu mesozoic volcanic fault basin and Luomahu uplift.There exposures late proterozoic-early cambrian luomahu group metamorphic rocks and late proterozoic granitoids,late paleozoic granitoids,middle and late mesozoic granitoids,as well as lower devonian niqiuhe group silty slate and early cretaceous volcanic lava and pyroclastic rocks in study area.The metallogenic belt of the study area is located in the north-eastern end of the middle-late Variscan-middle Yanshanian copper,molybdenum,gold,tungsten,lead and zinc metallogenic belt(III)in the Daxingan Mountains and the Pankaimen-Guliku gold metallogenic sub-belt(IV).The main ore body of the No? is controled by NNE tectonics,its shap is vein,exsits in silica andesite and dolomite.The orebodies exsit silication andesite of Longjiang group,simple-vein output,branching and compounding,companding and shrinking,pinching out reappearance phenomenons.In summary,the tectonic development is dominated by fault and volcanic structures.The SN-oriented faults are large in scale,controlling the geochemical anomalies,ore-bearing structures and mineralization bodies in the study area.The gold-silver ore body mainly exists in the silicification,the pyritization dacite and the andesite of the lower cretaceous Guanghuazhen group,which is the shape of vein and band in volcanic rocks and has a steep occurrence.The soil geochemical anomaly for Au-Ag fits is a favorable area for gold mineralization in the area.We should deeply research for ore body,mineralization belt,and Au-Ag-As fitted section.Engineering verification can be carried out in order to expand the prospecting effect.