The Differences of Geological Characteristics and Gold Mineralization Between the East and West Part of the Upper Heilongjiang Basin

The Upper Heilongjiang Basin is a faulted basin in the northern of Daxinganling Montains.It is a downfaulted basin of Mesozoic tectonic by the terrigenous clastic filler and the deposition,its formation and evolution is constrainted by Mongolia-Okhotsk orogen.The basin exists petroleum,natural gas,coal,gold,silver,copper and other non-metallic mineral.Through the analysis of the formation and development of the basin evolution and mineralization characteristics of gold deposits(dot) had been found in the basin,we suggested that there is diffrence on the east and west part of the basin(devided by the Changying-Yilin-Longhe) on formation,structure and other geological features,which caused the difference in the genesis and metallogenic characteristics.Based on the summary of the mineralization characteristics on the east and west part of the basin,we come to the conclusion that the exploration work shoud concentrated on looking for the old basement wall rock mineralization Cu,Au deposit and a 22 station Formation for the surrounding rock in the eastern area;but altered rocks and quartz vein type gold deposits in the western area;and volcanic strata surrounding rock altered rock type gold deposit in the eastern region,as well as rock gold deposits including rock gold deposit types in the western district.The eastern region has large prospecting potential,which is the favorable areas to find a large and a very large rock gold deposits.