【摘要】 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。更多还原

【Abstract】 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.更多还原