Study On Metallogenic Regularity And Metallogenic Prediction Of Huaishuping Gold Deposit, Songxian County, Henan Province

The study area is located in the southern margin of north China tectonic massif,between Xiong`er mountain uplift and the binding site of Daizhang-Tantou Cenozoic rift basin.Huaishuping gold deposit is type of a warm liquid alteration in silicification altered rock type gold deposit,that first found in the study area in Xiong`er group of slowly inclined interlayer extrusion zone.It is forecast metallogenic target of Huashupingping gold deposits and determined the formation of ore deposits by the study of geochemistry,geophysics and metallogenic regularities in this paper,and provide theoretical basis for further prospecting work in the study area.The study area have been proved 12 orebodies,the main orebody is concealed orebody of K₂₃,K₂₄,orebodys in space is roughly parallel,equidistant distribution,layered characteristics significantly,flat upper and lower a little steep,present"expands to narrow,pointed out the reappearance,pinchout side now".K₂₃,K₂₄orebody has a certain regularity of lateral plunging that orebody lateral plunging to about 220°,pitch is 8°¹0°.Common surrounding rock alteration are mainly silicification,K-feldspar,sericitization,followed by calcite,kaolinite,chlorite,metal mineralization are mainly pyritization,secondly is chalcopyrite and galena,pyritization,silicification are closely related to mineralization.Mineralization periods are divided into alteration period,hydrothermal stage and supergene stage,the hydrothermal ore-forming process is divided into the milky quartz vein-crumb pyrite stage,smoke gray quartz vein-polymetallic sulfide stage and quartz-carbonate veins stage.The main mineralization of gold is phase II.The range of main ore-forming stage fluid temperature is 228?³00?;?,? stage ore-forming fluid composition characteristics is H₂O-NaCl-CO₂system,metallogenic stage of ? is H₂O-NaCl system.Geophysical prospecting of EH₄ anomalies is not obvious in this area,indicating significance of mineralization is limited.Themodelofgolddepositprimaryhalozoningis Mo-Pb-Co-Zn-V-W-Ni-Au-Cu-Sb-Bi-Ag-Hg-As,the axial zoning sequence has obvious“reverse zoning”characteristics,indicated exist blind orebodies or extension to the deep.The chron age of Rb-Sr isotope in the quartz fluid inclusion Huaishuping gold deposit is?163+3?Ma closed to the age 177 Ma of Wuzhang mountain granite,that mineralization related to the after of magmatic hydrothermal.Metallogenic epoch is the end of the middle Jurassic,Granite rock mass of Wuzhang Mountain is the metallogenic geological body.Establishing the model of integrated exploration of ore deposits basised metallogenic regularities in the study area,delineated 4 metallogenic prediction target area that include a class ? target,two class ? target,a class ? target,Three verified drillings are implemented,the result of see mine effect is well,the forecast results is reliable.