摘要
阿什加金矿位于西秦岭夏河—合作断裂带北部,区内成矿条件优越。该矿是近年来新发现的一金矿床,处于岗岔至阿什加矿集区,对其进行分析研究,可为区内综合分析和地质勘查工作提供参考与对比。矿区现已探获8条金矿体,平均金品位3.03×10^(-6)。矿体受地层岩性、构造和岩浆岩控制,北西向层间构造为成矿热液的运移提供了通道和沉淀的场所,并控制矿体的产出和规模,在其变化段易形成工业矿体。褐铁矿、黄铁矿、辉锑矿和毒砂与金矿化关系密切,金主要以包裹金形式赋存于其中,金矿化的富集与蚀变的强度和硫化物含量呈正相关关系。通过总结分析矿床基本地质特征,并结合岗岔—阿什加矿集区成矿特征,认为在矿区深边部仍具较好的找矿前景。
Ashijia gold deposit is located in the north of Xiahe Hezuo fault zone in the West Qinling Mountains,with superior metallogenic conditions.This deposit is a newly discovered gold deposit in recent years which is located in the Gangcha Ashijia ore concentration area.The analysis and study of this deposit can provide a comparative reference for comprehensive analysis and geological exploration in the area.Eight gold ore bodies have been discovered in the mining area,with an average gold grade of 3.03×10^(-6)。The ore body is controlled by stratum lithology,structure and magmatic rock.The NW trending interlayer structure provides a channel and a place for the migration of ore-forming hydrothermal solution,controls the output and scale of the ore body,and is easy to form an industrial ore body in its changing section.Limonite,pyrite,stibnite and arsenopyrite are closely related to gold mineralization.Gold mainly occurs in the form of wrapped gold.The enrichment of gold mineralization is positively related to the intensity of alteration and sulfide content.Based on the summary and analysis of the basic geological characteristics of the deposit,combined with the metallogenic characteristics of the Gangcha Ashijia ore concentration area,it is considered that there is still a good prospecting prospect in the deep side of the mining area.
作者
朵得文
杨小英
王广有
黄小丰
王雷
刘培雄
邹凯
DUO De-wen;YANG Xiao-ying;WANG Guang-you;HUANG Xiao-feng;WANG Lei;LIU Pei-xiong;ZOU Kai(Gansu Chenzhou Mineral Development Limited Liability Company,Hezuo 747000,China;No.245 Team,Hunan Provincial Bureau of Non-ferrous Geology and Exploration,Jishou 416007,China)
出处
《甘肃地质》
2023年第1期29-37,共9页
Gansu Geology
关键词
阿什加金矿
矿床特征
矿集区
找矿前景
层间构造
甘肃
Ashijia gold deposit
deposit characteristics
ore concentration area
prospecting
interstratified structure
