西藏尼木县厅宫铜矿矿床成因及找矿标志探讨  

Genesis and Prospecting Signs of Tinggong Copper Deposit in Nimu County,Xizang Province

作　　者：张涛 李涛 牟业龙[1] ZHANG Tao;LI Tao;MU Yelong(Northwest Research Institute of Mining and Metallurgy,Baiyin 730900,China)

机构地区：[1]西北矿冶研究院,甘肃白银730900

出　　处：《甘肃冶金》2024年第5期131-134,共4页Gansu Metallurgy

摘　　要：西藏尼木县厅宫铜矿矿床位于冈底斯斑岩铜矿带东段,该地区因其独特的地质构造特征而成为研究斑岩型铜矿成因与找矿标志的重要区域。该矿床的形成与中新世岩浆活动紧密相关,岩浆侵入为成矿提供了物质基础。矿区的地质构造背景,尤其是断裂和围岩蚀变,为矿化流体的运移和沉淀创造了有利条件。钾硅化和黄铁绢英岩化蚀变在成矿过程中发挥了重要作用,钾硅化为成矿流体的运移提供了通道,黄铁绢英岩化蚀变可能是铜等金属元素沉淀的直接原因。矿区地球物理特征揭示了矿化体与围岩之间的电性差异,为深部找矿提供了重要信息。此外矿化露头、特定岩性和规模的斑岩体、围岩蚀变、矿区地球物理异常可以作为该区直接或间接找矿标志。The Tinggong copper deposit in Nimu County,Xizang Province is located in the eastern section of Gangdise porphyry copper belt,which has become an important area for studying the genesis and prospecting indicators of porphyry copper deposits because of its unique geological structure characteristics.The formation of this deposit is closely related to Miocene magmatic activity,and magmatic intrusion provides material basis for mineralization.The geological structure background of the mining area,especially the fracture and surrounding rock alteration,created favorable conditions for the migration and precipitation of mineralized fluids.Potassic silicification and pyritic sericitization played an important role in the mineralization process.Potassic silicitization provided a channel for the migration of ore-forming fluids.The pyritic sericitization alteration may be the direct cause of the precipitation of copper and other metal elements.The geophysical characteristics of the mining area reveal the electrical difference between the mineralized body and the surrounding rock,which provides important information for deep prospecting.In addition,mineralization outcrop,porphyry of specific lithology and scale,alteration of surrounding rock and geophysical anomaly of mining area can be used as direct or indirect prospecting indicators in this area.

关 键 词：西藏尼木县 斑岩型铜矿 围岩蚀变 矿床成因 找矿标志 

分 类 号：P618.41[天文地球—矿床学]