西秦岭迭部县达拉乡地区金成矿规律及成矿预测  

Structural features and Structural evolution in Dala Township,Diebu County,West Qinling

作　　者：韩学坤 HAN Xue-kun(The First Geological and Mineral Exploration Institute of Gansu Geological and Mineral Exploration and Development Bureau,Tianshui 741020,China)

机构地区：[1]甘肃省地质矿产勘查开发局第一地质矿产勘查院,甘肃天水741020

出　　处：《世界有色金属》2023年第8期110-112,共3页World Nonferrous Metals

基　　金：甘肃省基础地质调查项目“甘肃省迭部县达拉乡地区1:5万矿产远景调查”(2016-2018)。

摘　　要：研究区大地构造分区属秦祁昆造山系、秦岭弧盆系、西倾山-南秦岭陆缘裂谷带。笔者在开展甘肃省迭部县达拉乡地区1∶5万矿产远景调查工作时,对区内金矿资源潜力进行了分析,认为研究区金矿成矿地质条件与区域典型矿床马脑壳金矿成矿地质条件相似,区内成矿区带、沉积建造、构造线方向与马脑壳金矿相同,大河坝组是主要的含金地层,其复理石沉积建造,砂岩、板岩接触部位及其它沉积相过渡带是重要的金矿富集部位;在年那一带有U、W地球化学异常和遥感环形构造,推测深部可能有隐伏花岗岩体存在;区内圈定的化探综合异常和遥感异常套合较好,是主要的找矿信息;地表发育的硅化、碳酸盐化、褐铁矿化、绿泥石化、黄铁矿化地段,是金矿重要的直接找矿标志。研究区成矿模式为中低温热液型金矿,预测年那一带找矿靶区金金属量4000kg。The Structural divisions of the study area belong to the Qin-Qikun orogenic system,the Qinling arc-basin system,and the Xiqingshan-South Qinling continental margin rift belt.The author established the Structural framework of the study area when carrying out a 1∶50,000 mineral prospect investigation in Dala Township,Diebu County,Gansu Province.The potential of gold resources in the area was analyzed,and it was concluded that the geological conditions of gold ore mineralization in the study area were similar to the geological conditions of horse brain case gold ore in the typical ore deposit in the region,the direction of the mineralization zone,sedimentary construction and tectonic line in the area was the same as that of the horse brain shell gold deposit,and the large river dam formation was the main gold-bearing strata,and its compound stone sedimentary construction,sandstone,slate contact parts and other sedimentary facies transition zones were important gold enrichment sites.In that year,there were U and W geochemical anomalies and remote sensing ring structures,and it was speculated that there may be hidden granite bodies in the deep part;The geochemical exploration comprehensive anomalies and remote sensing anomalies delineated in the area are well interset and are the main prospecting information.The silicification,carbonate,limonite,chlorite and pyrite mineralization areas developed on the surface are important direct prospecting marks of gold mines.The metallogenic mode of the study area was medium and low temperature hydrothermal gold ore,and the amount of gold metal in the prospecting target area in the forecast area was predicted to be 4000kg.

关 键 词：西秦岭 金矿 成矿规律 成矿预测 

分 类 号：P618.51[天文地球—矿床学]