Characteristics Of Baishitai Silver Polymetallic Deposit In Fuping Hebei Province And Its Mineralization And Enrichment Law

North Taihang Mountains is an important metallogenic belt in China,It is one of the non-ferrous metal accumulation areas in Hebei Province.Baishitai silver polymetallic deposit in Fuping,Hebei Province is located in the metallogenic belt of the northern Taihang Mountains.Baishitai silver polymetallic deposit is located in the middle of Taiyu and Gaogong rock bodies.The outcropped strata are mainly the Fuping Group of Late Archaean? Gao YuZhuang group of Mesoproterozoic Changcheng series,The Fuping Group mainly includes: Potassium length(two length)Shallow grained rock of Yuan Fang rock formation,Magmatic activity is intense in the area,They are mainly Yanshanian intrusive rocks.It is divided into two small rock masses.,Gaogong and Taiyu rock mass.The lithology is granodiorite porphyry,Microcrystalline albite porphyry,Cryptoexplosive breccia,Granite porphyry.Development of Mesozoic dikes such as lamprophyre and diorite porphyry in the study area,There are faulted structures and cryptoexplosive breccia structures in the study area.Taking the Zijingguan Deep Fault as the Main Trunk,is the main rock control,and Ore controlling structure in this area.The spatial distribution of magmatic and metallogenic belts in this area is controlled by he Zijingguan Deep Fault.The orebody is controlled by cryptoexplosive breccia,microcrystalline albite porphyry and tectonic alteration zone.It occurs in cryptoexplosive breccia,microcrystalline albite porphyry and granodiorite porphyry.At present,24 veins and 40 orebodies have been found.Among them,I-3-1 orebody is the main orebody.The ore minerals are mainly pyrite,galena,sphalerite,chalcopyrite,limonite,malachite,rutile andNatural gold,silver-gold ore,pyrrhotite,molybdenite,etc.Gangue minerals are mainly quartz,sericite,and a small amount of epidote,tremolite,diopside,chlorite,calcite,fluorite,apatite,etc.The ore is mainly of unequal granular metamorphic structure,grain-like structure and porphyry structure.Ore structure has disseminated structure and massive structure.Strong alteration of surrounding rock in the study area,The main types are silicification,sericitization and chloritization.According to Pb isotope data,It is concluded that the ore-forming materials are mainly derived from the deep crust(lower crust and upper mantle).And it has a lot to do with orogeny.The geological structure and lithology of the study area are complex.Surface mineralization characteristics are obvious,It has obvious metallogenic characteristics.As,Sb,Au,Ag,Cu,Pb,Zn,Hg and other elements in this section basically coexist along the section line.According to the law of element symbiosis,The deposit type is low temperature hydrothermal silver polymetallic deposit.In conclusion,the genetic type of Baishitai silver deposit is determined to be hydrothermal vein type silver polymetallic deposit controlled by fracture structure.Deep engineering control data show that,Microcrystalline albite porphyry and granodiorite porphyry extend southward and southeastward downward,The induced polarization anomaly D1-2 extends to the lower part of Taiyu rock mass.D1-3,D2 and D3 anomalies zoned to southeastern contact zone of Taiyu intrusion in southeastern China,Both show that the lower part of microcrystalline albite porphyry and granodiorite porphyry is highly polarized.Generally speaking,Baishitai silver belongs to the medium scale of ore silver.Uncontrolled orebody edge and depth,Cryptoexplosive breccia is the front of porphyry,Ag-Pb-Zn mineralization with hydrothermal vein at the edge,Deep copper-molybdenum mineralization tends to be strengthened,This area is located in the copper,molybdenum,lead,zinc and gold polymetallic exploration area of Hengli-Lianyuan Kaabaling,Fuping.Located in Lingshan-Zijingguan deep fault zone,Development of fault structure,Magmatic activity is frequent and has good metallogenic geological conditions.Through the study of the characteristics of the deposit,the regularity of mineralization enrichment is summarized,which provides certain theoretical support for future prospecting and provides help for the next work.