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新、老金厂金矿床产出于下二叠统哲斯群中，由火山岩段和碎屑岩段组成。火山岩以中基性为主，矿区内主要为英安岩、无斑英安岩，碎屑岩段由正常碎屑岩和火山碎屑岩组成。在新金厂大断裂南侧，金异常主要分布在火山岩中；在北侧，金异常主要分布在火山碎屑岩中。新、老金厂构造是二叠纪末期裂谷带褶皱回返和印支—燕山期运动叠加的产物。矿区内断裂构造发育，褶皱构造不发育。矿体和矿化主要受断裂控制，容矿构造亦是这些断裂及次级断裂本身。
The new and the Laojinchang gold deposits are produced in the Lower Permian Phish Group and consist of volcanic rocks and clastic rocks. The volcanic rocks are mainly of medium-basicity. Mainly in the mining area are dacite and freckles, and the clastic rocks are composed of normal clastic rocks and volcaniclastic rocks. On the south side of the new gold factory large fault, gold anomalies are mainly distributed in the volcanic rocks; on the north, the anomalous gold is mainly distributed in pyroclastic rocks. The new and old gold plant structures are the product of folding fold of the Late Permian rift zone and the superimposition of Indo-Yanshanian movement. The fault structure in the mining area develops and the fold structure is not developed. The ore body and mineralization are mainly controlled by faults, and the ore-hosting structures are also the faults and the secondary faults themselves.