江西上饶船坑铜矿矿床特征及找矿方向分析OA

This study presents the findings of mineral deposit research,integrating geological,geochemical and structural analyses to advance understanding of ore-forming processes and exploration strategies. [Objective]To reveal the metallogenic system characteristics of the Chuankeng copper deposit,explore the genetic relationships between deep porphyry-type copper mineralization and shallow tectonic fracture zone-type gold mineralization,evaluate the potential for large-scale porphyry copper deposits in the area,and provide a theoretical basis for subsequent prospecting and exploration.[Methods]Conducted studies of mine geology,orebody characteristics,and wall-rock alteration to establish a metallogenic model.Analyzed ore-controlling factors by integrating thrust nappe structures,magmatic activities and lithological contact zone features.Utilized geophysical and geochemical anomalies to reflect the distribution of skarn-type orebodies and elemental zoning patterns.[Results]The Chuankeng copper deposit is a skarn-type copper-sulfur deposit,hosting in limestone interbeds of the Triassic Tieshikou Formation,controlled by contact metasomatism with granodiorite porphyry.Associated minerals include pyrite,magnetite,and tectonic fracture zone-type gold deposits.Under the Early Yanshanian back-arc extensional setting,the emplacement of Type I granodiorite porphyry triggered multi-stage mineralization:deep porphyry-type Cu-Mo mineralization,mid-shallow skarn-type Cu deposits,and shallow structural alteration-type Au deposits.Magnetic anomalies align closely with skarn zones,while geochemical anomalies indicate the source direction of ore-forming fluids.[Conclusions]This deposit shares a similar metallogenic background with regional Dexing and Yongping copper deposits,demonstrating potential for large-to-medium skarn and porphyry copper deposits and small hydrothermal gold deposits.Hidden multi-stage skarn-porphyry copper orebodies exist in deep peripheral areas,with limestone interbeds beneath the southeastern thrust nappe structure identified as critical targets.Magnetic anomalies and elemental zoning provide key clues for deep exploration,warranting further deep drilling verification.