Lead and zinc deposit of laochang type is mesothermal deposit of vein type that occur in an unconformity interface between Devonian and Cambrian strata and controlled by fracture structure.

• 老厂式铅锌矿是产于泥盆系和寒武系不整合界面之间的脉状中温热液铅锌矿床,受断裂构造控制。