Discussion on Geological Features and Genesis of the Eastern Section of East Laozuoshan Gold Ore Belt in Heilongjiang

The eastern section of the east ore belt is the largest gold deposit in Laozuoshan gold deposit region.The ore body is controlled by the NW-trending fractured faults belt.The gold ore body is controlled by the compression and compression-torsion shear brittle and brittle-ductile fault.The ore body exists in tectonic breccia and skarn.It arranges as steep tilt parallel vein,layer and lens shaped.The extension is greater than the extension.The types of ore bodies are mainly disseminated.Gold ore bodies exist closely together with arsenopyrite and pyrrhotite.The depth of the ore body is more than 11 km.It is a typical middle or deep orogenic gold deposit.There should be a lot of deep exploration potential without considering the late-forming factors such as erosion.At present,the depth of IP sounding is less than 300 m,and drilling depth reaches 500 m.The main ore body doesn't appear continuously.The ore body controlling faults and skarn zone still tend to descend.The lower part may be the second ore-body forming space.