陕西凤县地区九子沟铜矿的特征、成因及意义

九子沟铜矿是凤县-太白铅锌多金属矿集区近年来发现的新矿床。矿化类型主要表现为硅质岩型、硅化灰岩型和石英-方解石脉型。矿体主要呈层状、似层状、透镜状与围岩整合产出，且多被后期顺层或切层含矿石英-方解石脉交代，形成富矿体。综合地质特征和地球化学特征，认为该矿床成因类型为喷流沉积-改造型铜矿。九子沟等铜矿床（点）与区域上的铅锌矿床构成了热水喷流沉积矿床的元素分带模式。这一发现，指示今后该地区可在热水喷流沉积矿床元素分带模式的基础上，结合区带内背斜控矿的地质特征开展找矿工作。

Characteristics, genesis and significance of the Jiuzigou copper deposit in Fengxian County, Shaanxi Province

Jiuzigou deposit is a newly discovered copper deposit in the Fengxian-Taibai Pb-Zn polymetallic ore district. Siliceous, silicified limestone and quartz-calcite are the main mineralization types. Ore bodies in layered, stratoid and lenticular forms are in conformable contact with the host rocks and cut by late quartz-calcite veins, forming rich ore bodies. Combining geological features with geochemical characteristics, the authors hold that this ore deposit is of the SEDEX-rebuilt type. The Jiuzigou deposit and other ore deposits in this region constitute a typical SEDEX element zoning model. This discovery, in combination with other structural characteristics, will play a significant role in guiding the future exploration in this area.