东昆仑造山带向阳沟金矿床地质-化探综合找矿模型及找矿效果  

Comprehensive geological-geochemical prospecting model of Xiangyanggou Gold Deposit in East Kunlun orogenic belt and its prospecting effect

作　　者：王永德 冶晓平 秦泗伟 Wang Yongde;Ye Xiaoping;Qin Siwei(No.5 Geological Survey Institute of Qinghai Province;The Eighth Geological and Mineral Exploration Institute of Shandong Province)

机构地区：[1]青海省第五地质勘查院 [2]山东省第八地质矿产勘查院

出　　处：《黄金》2023年第11期69-75,共7页Gold

基　　金：青海省地质勘查基金项目(青自然资〔2019〕133号)。

摘　　要：向阳沟金矿床位于东昆仑造山带西段,区域内已发现大灶火金矿床、黑刺沟金矿床等。矿体主要赋存于不同时代碎屑岩接触部位或同一时代碎屑岩与碳酸岩接触部位的破碎蚀变带内,破碎蚀变带为含矿流体提供运移通道及沉淀场所。断裂交会部位,断裂与有利岩体、地层交会部位及断裂转折端等膨胀扩容区为重要成矿部位。1∶10000土壤地球化学测量圈定了综合异常8处,认为Au最大值大于50.00×10^(-9)的地段是重要的地球化学找矿位置。在充分总结找矿标志的基础上,建立地质-化探综合找矿模型,在向阳沟金矿区圈定了找矿靶区6处,通过查证,共圈定矿体17条、矿化体37条,取得了找矿突破。矿(化)体长80~320 m,真厚度0.82~6.46 m,金品位1.16×10^(-6)~14.30×10^(-6)。综上所述,该综合找矿模型适用于向阳沟金矿床,可为区域内寻找同类矿床提供借鉴。Xiangyanggou Gold Deposit is located in the western part of the East Kunlun orogenic belt.In the area,gold deposits such as Dazaohuo Gold Deposit and Heicigou Gold Deposit have been discovered.The ore bodies mainly occur in fracture altered zones at the contact areas of clastic rocks of different eras or the contact areas of clastic rocks and carbonate rocks of the same era.The fracture altered zones provide transport channels and precipitation sites for ore-bearing fluids.The intersection of faults,the intersection of faults with favorable rock masses and strata,and the expansion areas such as fault turning points are important mineralization areas.1∶10000 soil geochemical survey delineated 8 comprehensive anomalies and it is believed that the areas with Au maximum value greater than 50.00×10^(-9)are important geochemical prospecting locations.Based on an in-depth summary of prospecting indicators,a comprehensive geological-geochemical prospecting model was established.6 prospecting target areas were delineated in the Xiangyanggou Gold District,and a total of 17 ore bodies and 37 mineralized bodies were verified,which is a prospecting breakthrough.The ore(mineralized)body is 80-320 m long,with an average actual thickness of 0.82-6.46 m and a gold grade of 1.16×10^(-6)-14.30×10^(-6).In general,the comprehensive prospecting model applies to Xiang-yanggou Gold Deposit and can provide references for similar deposits in the region.

关 键 词：土壤地球化学测量 地质 化探 综合找矿模型 向阳沟金矿床 东昆仑造山带 

分 类 号：TD15[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]