西藏隆子县那穷锑金矿地质特征及找矿前景分析

那穷锑金矿是近年来通过区域地质矿产调查在西藏自治区隆子县新发现的金多金属矿床，其矿化带受断裂构造控制。目前该矿床研究程度相对较低，若对其成矿地质条件、地质特征及找矿潜力等内容进行专门性和系统性研究，可为该矿床的下步找矿勘探工作提供依据。文章通过总结区域成矿地质背景，分析了该矿床地质特征、地球物理与地球化学异常特征、包裹体地球化学特征，并结合遥感地质特征和异常查证开展相关研究工作，结果表明:矿体主要产于上三叠统涅如组中，受东西向次级断裂构造带控制，目前共发现3条破碎蚀变带；土壤地球化学剖面测量工作中，选择了Sb、Au、As、Bi、Cu作为Sb及多金属成矿指示元素，共圈定单元素异常10处，各元素异常套合较好；激电中梯测量共圈定极化体2条，视极化率异常3处；与成矿有关的流体包裹体类型主要为富液包裹体，并推测矿区流体为含微量CO₂、N₂气体的中低温低盐度NaCl-H₂O热液体系。综合分析认为那穷锑金矿区具备优越的成矿条件，具有寻找金多金属矿的潜力。 

Geologic characteristics of the Naqiong Sb-Au deposit and prospecting perdiction for Au-polymetallic deposits in Longzi County, Tibet

The Naqiong Sb-Au deposit is a newly discovered Au-polymetallic deposit in Longzi county, Tibet. Recent years of regional geological surveys reveal that its mineralized zone is controlled by fault structure. In view of the relatively low research degree of this deposit, a specialized and systematic research on its metallogenic geologic conditions, geologic characteristics and prospecting potentials will lay a foundation for further prospecting and exploration work of this deposit. The geologic characteristics, geophysical and geochemical anomaly characteristics, inclusion geochemical characteristics are analyzed based on the regional metallogenic geological background. The analysis results in combination with the remote sensing geologic characteristics and anomaly verification work show that the ore bodies mainly occur in the Nieru formation of upper Triassic and are controlled by the EW-trending secondary fault structural belt. Three fractured alteration zones have been found. Through the soil geochemical profile survey, Sb, Au, As, Bi and Cu are selected as the indicator elements for Sb and polymetallic mineralization. All together there are ten single element anomalies, showing good match with each other. Two polarization bodies and three apparent polarizability anomalies are defined by induced polarization intermediate gradient measurement. The fluid inclusions related to mineralization are mainly liquid-rich inclusions. It is inferred that the fluid in the mining area belongs to a medium-low temperature and low salinity NaCl-H₂O hydrothermal system containing traces of CO₂ and N₂. Overall, the available data support the notion that the Naqiong Sb-Au mining area has superior metallogenic conditions for Au-polymetallic deposits.