冀北蔡家营铅锌矿床成因探讨

古元古代是蔡家营矿床的重要的成矿期，在本区古元古代裂谷活动中，发生了海底火山的喷发和沉积作用，除喷出大量的基性岩浆外，形成了红旗营子群火山-沉积岩地层，还有大量成矿物质的堆积，顺层形成块状硫化物矿体，后经上隆拉伸和挤压褶皱等强变质变形作用，使层状矿体发生了“变质重就位”，部分形成脉状（或囊状）矿体。随后，又受到中生代构造岩浆热事件的叠加，使矿体再次经受了活化改造，有可能又有新的成矿物质加入，使矿体最后定位。故本矿床的成因应为多种地质作用下的多成因的火山喷发沉积-变质变形改造-热液叠加的铅锌矿床。

On Metallogeny of the Caijiaying Pb-Zn Deposit

Paleoproterozoic Era is an important ore-forming period in the Caijiaying Pb-Zn deposit. In this period, the eruption of the submarine volcano took place in the Paleoproterozoic rift. The eruption of the mass basic magma formed volcanic-sedimentary strata named Hongqiyingzi Group,and atthe same time, mass mineral-genetic material formed stratiform massive sulfide deposit. With the strong metamorphic deformation of the stretch and fold, the stratified ore body underwent re-emplacement,and formed veins or ore pockets. During the Mesozoic Era, the superposition of the tectonic-magmatic thermal event made the ore body reform again, and maybe the new mineral-genetic material joined in. Therefore, the metallogeny of the Caijiaying deposit is the polygenetic volcanic sedimentary-metamorphic deforming reformation-hydrothermal superposition Pb-Zn deposit, and formed in Paleoproterozoic and Mesozoic Eras.