Comprehensive Metallogenic Prediction Of The Baiyinxile Area In Medium-southern Part Of Daxinganling

This area is located on the west slope of the medium-southern part of Da Hinggan Mountains.The west slope belongs to the west Pacific Marginal metallogenic mega-domain,which is superimposed on the Paleo-Asian mega-domain,Da Hinggan mega-province Tuquan-Weng Niut Pb-Zn-Ag-Cu-Fe-Sn-REE mega-belt.The west slope developed large-scale mineralization in the Late Paleozoic and Mesozoic periods.The Late Paleozoic mineralization was mainly accompanied by the formation,development and extinction of the Paleo-Asian Ocean basin,forming multiple hydrothermal copper,lead,zinc,silver and volcanic-sedimentary iron deposits.In the Mesozoic,the west slope,influenced by the western Pacific tectonic activity,formed various polymetallic deposits,which associated with acidic volcanic-intrusive complexes in the continental facies,such as iron,copper,lead,zinc and tin.The study was carried out on the basis of four 1:50,000 regional mineral geological surveys in Xilinhot,Xilin Gol League,Inner Mongolia Autonomous Region.The geology,geophysics,geochemistry,remote sensing imagery and other mineralization geological conditions were studied,and various geochemical explorations and abnormal and mine(chemical)point verification were combined.By using computer GIS and other information technology,we summarize the ore-forming laws and conduct metallogenic prediction.The work achieved the following results:1.The distribution of deposits and ore points in the study area is controlled by the northeast and east-west structures.Most of the east-west structures are secondary structures of the NE-trending structure,which is an important ore-bearing space in the study area;2.The ore-forming geological bodies in the study area are mainly Early Cretaceous biotite monzonitic granites,which are rich in silicon,alkali-rich and rich in volatile matter.It is closely related to the discovery of tungsten tin,fluorite and rare rare earth mineralization in the eastern part of the study area.;3.The metallogenic age of the study area is the Late Jurassic-Early Cretaceous,and the mineralization types are mainly high temperature magmatic hydrothermal type,magma differentiation type,gas-forming hydrothermal type and hydrothermal fissure filling type;4.The study area is divided into 3 prospecting areas and 5 prospecting targets.The favorable mineralization elements are tungsten,tin,copper,silver,lithium germanium,antimony,rare earth and fluorite.