福建泰宁何宝山金矿成矿物理化学条件及成因分析  

Analysis on the Metallogenic Physicochemical Condition and the Genesis of Hebaoshan Gold Deposit in Taining County,Fujian Province

作　　者：林香 Lin Xiang(Northern Fujian Geological Brigade of Fujian Province,Fuzhou,350002)

机构地区：[1]福建省闽北地质大队,福州350002

出　　处：《福建地质》2020年第3期185-198,共14页Geology of Fujian

基　　金：福建省地矿局科研费项目“福建省何宝山金矿田构造控矿系统研究及找矿靶区预测”。

摘　　要：通过对泰宁何宝山金矿床中流体包裹体、氢氧同位素和硫铅同位素测试结果的研究,探讨何宝山金矿床形成物理化学条件及成因。流体包裹体研究显示,成矿流体演化经历了230~300℃和160~200℃2个主要阶段,总体显示中低温热液矿床特征;氢氧同位素研究分析,认为矿床成矿流体主要来源于岩浆水,后期有少量大气降水加入,导致成矿温度有所降低;而矿石硫铅同位素研究证明,成矿物质主要来自深源岩浆或地壳深部。综合研究分析,认为何宝山矿床为中低温热液-构造蚀变岩型金矿床。This paper makes a detailed analysis of the metallogenicphysicochemcal condition and the genesis of Hebaoshan gold deposit according to the study of the fluid inclusions and the H-O、S、Pb isotopes.The study of the fluid inclusions suggests that the evolution of the ore-forming fluids can be dicided into two syages,of the temperature peaks are 230~300℃ and 160~200℃ respectively,the overall performance is a medium-low temperature hydrothermal type gold deposit.The H-O isotopedata showed that the ore forming fluid mostly was derived from magma,and mixed with fewofmeteoric water at later stage,which lead to the decrease of ore-forming temperature.The S and Pbisotope compositions of ore indicate that the metallogenicmateral were derived from magam or deep crust.All of this suggest that Hebaoshangold deposit is a medium-low temperature hydrothermal and faulted fracture zone-altered rock gold deposit.

关 键 词：金矿床 流体包裹体 同位素 矿床成因 泰宁何宝山 

分 类 号：P618.51[天文地球—矿床学]