青海牛鼻子梁铜镍矿两期矿化作用及其找矿意义

牛鼻子梁铜镍矿是青海省西北缘阿尔金造山带最具有代表性的铜镍矿,矿区新发现了金矿化,重点对铜镍矿和金矿化特征、找矿潜力、找矿前景和找矿方向进行了深入分析.研究表明:①矿区内存在两期矿化作用,早期是受晚泥盆世超基性岩控制的典型的岩浆熔离—贯入型铜镍矿化,晚期是受穿过岩体的EW向断裂控制的典型的构造蚀变型金矿化,均位于泥盆纪...

Two-stage Mineralization and Its Ore-prospecting Significance in Niubiziliang Cu-Ni Deposit,Qinghai Province

Niubiziliang Cu-Ni Deposit is the most representative one in the Aerjin orogenic belt in the northwest margin of Qinghai Province,gold mineralization has been discovered in the mining area.By focusing on the characteristics of Cu-Ni deposit and gold mineralization, prospecting potential,prospecting prospect and prospecting direction,it is shown that:①There are two stages of mineralization in the mining area. The early stage is the typical magmatic fusion-penetration type Cu-Ni mineralization controlled by the ultrabasic rocks of the late Devonian,and the late stage is the typical tectonic alteration type gold mineralization controlled by the east-west faults passing through the rock masses, which are all located in the ultrabasic-basic rock masses of the Devonian; ②The prospecting prospect of copper and nickel deposit in the mining area is large,No.Ⅲ, No.Ⅳ, No.Ⅰ rock mass are all have prospecting potential,the prospecting prospect of the newly discovered gold mineralization is also large;③The subduction section of the southeast of No.III rock mass and the center of the “rock basin” of No.IV and No.I rock mass are the prospecting directions of Cu-Ni deposit in the mining area,the ore body (mineralization) of the existing gold bearing structural alteration belt and the delineated 1∶25 000 geochemical gold comprehensive anomaly are the prospecting directions of gold deposit;④The discovery and study of two-stage mineralization in the area is of great significance.The discovery of gold mineralization provides a new idea for ore prospecting in the area, and also provides a new opportunity for Cu-Ni deposit prospecting in the area.Breakthroughs will be made in the prospecting for gold in the early stage and the prospecting for Cu-Ni ore in the area.