The Geological,Geochemical Characteristics And Evaluation Of Resource Potential In Shiwuliqiao Region,Heilongjiang

The Shiwuliqiao area in Daxinganling,Heilongjiang Province is an important gold and polymetallic mineral prospect area in China.It is located at the junction between the Ershierzhan Depression Belt and the Xiushuishan Thrust Belt of the northeast of the Daxinganling Arc System and south of the Mohe Foreland Basin in the Tianshan-Xingmeng Orogenic System.The fracture structure in this area is relatively developed.The stratum is mainly upper Jurassic,lower Cretaceous and Cenozoic.The area is covered by forest and swamp and has a cold and mutative climate and inconvenient traffic.It is difficult to carry out geological,geophysical and geochemical exploration.And there are no large-scale geochemical data in this area.Therefore,we carried out the 1:50000 stream sediment survey relying on the comprehensive geological survey project in this area.We analyzed and counted the measuring result of 18 elements(oxide)by a series of processing data methods.And identified geochemical distribution characteristics of ore-forming elements and associated elements.It shows that Au is the most favorable ore-forming element with high concentration coefficient and big variation coefficient in this area.Based on the above works,368 single element anomalies,28 composite anomalies(including 2 Class A anomalies,9 Class B anomalies and 17 Class C anomalies)and 11 mineralization prospective areas have been delineated.And calculated potential resources of each mineralization prospective area by using geochemical abundance-model method,the potential resource of Au is calculated at about 39.47t and the potential resource of Cu is about 54200t in Yaozhanlinchang mineralization prospective area.