冀北上黄旗一带铅锌银多金属矿成矿因素分析

Analysis on Mineralization Factors of Lead-Zinc-Silver Polymetallic Deposits in Shanghuangqi Area of Northern Hebei

冀北上黄旗一带区域成矿条件优越,分布了大量铅锌银多金属矿,具有良好的成矿远景。通过总结区域地质、地球物理和地球化学特征,结合已知矿床的分布规律,从基本地质属性分析矿床成因。结果显示,该区铅锌银多金属矿成矿受地层、构造、岩浆岩控制明显,新太古界基底变质岩地层是重要的矿源层;复杂的构造活动为区域岩浆的侵入和矿产元素的富集提供了空间条件,区内火山机构为壳内物质上升提供了通道,并且为有益元素的运移提供了热源和动力;强烈的岩浆活动一方面提供了大量成矿热流,另一方面提供了丰富的成矿物质。成矿物质通过断裂活动、火山活动及岩浆侵入提供的热源活化、迁移,最终在有利的容矿构造部位富集成矿。

The area of Shanghuangqi in northern Hebei has superior ore-forming conditions,with a large number of lead-zinc-silver polymetallic deposits,which has a good metallogenic prospect.By summarizing the regional geological,geophysical and geochemical characteristics,combined with the distribution of known deposits,the genesis of deposits is analyzed from the basic geological attributes.The results show that the mineralization of lead-zinc-silver polymetallic deposits in this area is obviously controlled by strata,structure and magmatic rock,and the Neoarchean basement metamorphic rock strata are important source beds.The complex tectonic activities provide spatial conditions for the intrusion of regional magma and the enrichment of mineral elements.The volcanic edifices in the area provide channels for the rise of materials in the crust and provide heat and power for the migration of beneficial elements.On the one hand,intensive magmatic activity provides a large amount of ore-forming heat flow,on the other hand,it provides abundant ore-forming materials.The ore-forming materials are activated and migrated through the heat source provided by fault activity,volcanic activity and magmatic intrusion,and finally enriched and mineralized in favorable ore-hosting structures.