Metallogenic Regularity And Metallogenic Prognosis Of The Weishancheng Silver Gold Mineralized Belt,Tongbai,Henan

The Tongbai Weishancheng gold-silver ore belt in Henan Province is located at the junction of the Yangzi land block and North China land block,north of the Xiguanzhuang-Songpa ductile shear zone(Gui-Mei fault),belonging to the North Qinling fold belt,and is the most important gold-silver polymetallic metallogenic belt of Tongbai.From West to east,there are large-scale Poshan silver deposit,Yindongpo gold deposit,Yindongling silver polymetallic deposit and so on.The purpose of this paper is to ascertain the metallogenic geological body,metallogenic structure,metallogenic structural plane and metallogenic characteristics of the Tongbai Weishancheng gold-silver ore belt,the genesis of the deposit is discussed,and the metallogenic regularities and metallogenic models are summarized,establish a "trinity" geological prospecting model,and combine the information of mineral exploration,geophysical and geochemical exploration,etc.According to the comprehensive prospecting and prediction model of the research area,the prospecting and prediction target area is delineated.The following aspects have been achieved:(1)Taking the construction of three typical deposits as an example,a "trinity" prospecting prediction model characterized by metallogenic geological bodies,metallogenic structures,metallogenic structural planes and metallogenic processes is established.(2)The genesis of typical deposits in the Weishancheng gold-silver belt of Tongbai is summarized and summarized.(3)The main ore-controlling tectonic framework of Weishancheng Au-Ag ore belt is a coaxial superimposed heavy fold,and the specific orientation of orebody is controlled by the back-shaped core-two-wing bedding slip fracture zone,the shear thrust(thrust)fault zone and the back-shaped axis longitudinal fracture zone.Waitoushan Formation is the main ore-controlling stratum in Weishancheng Au-Ag ore belt.Carboniferous sericite quartz schist is the best ore-hosting lithology.(4)Various ore-controlling factors of Weishancheng Au-Ag ore belt are analyzed in depth.Taking three typical deposits as examples,the metallogenic regularity is summarized and the prospecting model of Au-Ag deposit is established.Two prospecting and prediction targets have been delineated: one grade A and one grade B.