大雪山镍矿位于西南三江特提斯保山地块,是特提斯东段至今发现的首例岩浆镍–铜硫化物矿床,成矿过程主要受岩浆熔离作用控制。本研究在野外地质调查的基础上,查明了区域内基性–超基性岩体的空间分布特征和大雪山岩体的岩相分带特征,并以“三位一体”找矿理论为指导依据,厘定了矿床的成矿地质体,归纳总结了矿床的成矿结构面类型,确立了岩浆熔离作用和同化混染作用为矿床的主要成矿作用。在此基础上,构建了大雪山矿床的成矿地质模型,并结合地质、化探、遥感等多方面有利信息,在大雪山地区及外围圈定了找矿预测区域,对未来的镍–铜矿找矿勘查工作具有重要的指导意义。The Daxueshan Nickel deposit is located in the Baoshan Block of the Sanjiang Tethys belt in southwest China. It’s the first case of magmatic Ni-Cu sulfide deposit that has been discovered in the eastern part of the Tethyan orogenic belt. The mineralization process is mainly controlled by magmatic liquation. This study is based on field geological surveys to clarify the spatial distribution characteristics of the basic-ultrabasic rock bodies in the region and the petrographic zoning of the Daxueshan intrusion. Guided by the “trinity” mineral exploration theory, the metallogenic geological entities of the deposit were delineated, and the types of metallogenic structural surfaces were summarized. It was established that magmatic differentiation and assimilation contamination are the main metallogenic processes of the deposit. Building upon this, a metallogenic geological model for the Daxueshan deposit was constructed, integrating geological, geochemical, and remote sensing data to delineate mineral exploration prediction areas in the Daxueshan region and its periphery, which holds significant guiding relevance for future nickel-copper mineral exploration efforts.
