豫西上宫金矿床成矿流体特征  

Characteristics of ore-forming fluids of Shanggong Gold Deposit in western Henan

作　　者：王俊德 任彧仲 杜晓阳 夏文则 岳辉 孙朝阳 孙乐飞 Wang Junde;Ren Yuzhong;Du Xiaoyang;Xia Wenze;Yue Hui;Sun Chaoyang;Sun Lefei(The First Institute of Geological and Mineral Resources Survey,Henan Bureau of Geology and Mineral Exploration and Development;Key Laboratory of Gold and Silver Polymetallic Ore-forming Series and Deep Prognosis of Henan Province;Key Laboratory of Precious Metals Analysis and Exploration Technology,MNR)

机构地区：[1]河南省地质矿产勘查开发局第一地质矿产调查院 [2]河南省金银多金属成矿系列与深部预测重点实验室 [3]自然资源部贵金属分析与勘查技术重点实验室

出　　处：《黄金》2022年第12期19-25,共7页Gold

基　　金：河南省国土资源厅项目(豫国土资发〔2015〕70号,豫国土资发〔2016〕46号)。

摘　　要：上宫金矿床位于熊耳山金矿田北部。通过对上宫金矿床区域地质背景、矿床地质特征、成矿流体特征进行研究,认为成矿流体演化可分为4个阶段。矿石包裹体以气液两相包裹体为主,常见气液比5%~10%,但从5%~30%均有产出;最有利的成矿温度为200℃~300℃;盐度主要集中于5%~10%,平均值为8.9%,成矿流体为中高盐度流体;成矿压力为80~93 MPa;成矿流体主要属于NaCl-CO、CO_(2)-H_(2)O的含卤素和碱质水溶液体系,随着温度的降低,由成矿阶段到成矿后阶段,成矿溶液发生了由弱酸性向弱碱性的转变。研究成果对区域内类似金矿床成矿流体特征研究具有一定借鉴意义。Shanggong Gold Deposit is located in the north of Xiongershan Gold Field.Based on the study of the regional geological background,geological characteristics,and characteristics of ore-forming fluids of Shanggong Gold Deposit,it is considered that the evolution of ore-forming fluids of Shanggong Gold Deposit has 4 stages.The ore inclusions are dominated by gas-liquid two-phase inclusions,which commonly occur with the gas-liquid ratio of 5%-10%and possibly occur with 5%-30%;the most favorable metallogenic temperature is 200℃-300℃;the fluid is with a medium-high salinity,mainly between 5%and 10%,8.9%on average;the ore-forming pressure is 80-93 MPa;the ore-forming fluid mainly belongs to the NaCl-CO,CO_(2)-H_(2)O system containing halogen and alkaline water solution.When the temperature decreases and the ore-forming stage proceeds to the post-mineralization stage,the ore-forming solution changes from weak acidity to weak alkalinity.The results can be used as a reference to study the characteristics of ore-forming fluids in similar gold deposits in the region.

关 键 词：上宫金矿床 成矿流体 包裹体 成矿温度 成矿压力 

分 类 号：TD11[矿业工程—矿山地质测量]