甘肃新老金厂金矿床地质特征

新金厂、老金厂金矿是柳园金矿化集中区中的２个重要金矿床，均产于二叠系下统基性火山岩段之中，矿化具有明显的共性，即沿新金厂大断裂及其次级断裂分布，主要金矿体均产于大断裂上盘。通过对区内火山岩、构造、不同成矿阶段的矿体形态、规模、矿石类型、物质成分、结构构造、围岩蚀变等特征的研究，认为它们应是一个统一的金矿床。

The geological characters of Xinjinchang and Laojinchang gold deposits

Xinjinchang and Laojinchang are two important gold deposits of the gold minerlization zone of Liuyuan. Both of them are located in the volcanic rocks of the Permian system, and they have same miner alization mechanism. That's to say the mineralization is distributed along Xinjinchang main fault and it's se condary faults, and the major gold bodies are all existed in the hanging wall of the main fault. The author points out the cause of formation of the two deposits after studying the igneous rocks, conformation and the features of the gold bodies came into being in different mineralizing periods. The features include shape, scale, mineral type, material element, structure and conformation, surrounding rocks alteration etc. So the two deposits are considered to be an uniform centripetal gold deposit.