湘西雪峰构造带金控矿因素与成矿机理  

Factors controlling gold ores and mineralization mechanism in the Xuefeng tectonic belt,Western Hunan

作　　者：孙立吉 廖珊 郝立波[2] 赵新运[2] Sun Liji;Liao Shan;Hao Libo;Zhao Xinyun(Hunan Province Center for Natural Resource Affairs;College of Geoexploration Science and Technology,Jilin University)

机构地区：[1]湖南省自然资源事务中心 [2]吉林大学地球探测科学与技术学院

出　　处：《黄金》2023年第6期64-70,共7页Gold

基　　金：湖南省财政地质勘查项目(20180310)。

摘　　要：雪峰构造带发育大量的金矿床,是中国重要的金产地之一。然而,该构造带内金控矿因素问题一直未能厘清。金控矿因素研究对金的成矿规律总结和矿产资源勘查等都具有重要意义。从地层、构造和岩浆岩等方面探讨了雪峰构造带金控矿因素,并结合金矿床的时空分布特征分析了金的成矿机理,结果表明:构造是金成矿的必要条件,而前寒武纪地层和区域岩浆活动仅是金成矿的有利条件,雪峰构造带金成矿期集中在加里东期和印支期—燕山期,支持成矿流体来源为大气降水的观点。雪峰构造带内金矿床类型为变质碎屑岩型。Gold deposits are widespread in the Xuefeng tectonic belt,which is one of the most important gold-producing areas in China.However,factors controlling gold ores in the tectonic belt have not yet been fully understood.The study of ore-controlling factors is of great significance to the summary of gold metallogenesis and the exploration of gold resources.The ore-controlling factors of gold deposits in the Xuefeng tectonic belt are discussed from the perspective of stratigraphy,tectonics,and magmatism.Based on the spatial and temporal distribution characteristics of the gold deposits,the ore-forming mechanism of these deposits is investigated.The results show that tectonics is a necessary condition for gold mineralization,while the Precambrian stratigraphy and regional magmatic activity are only favorable conditions.The gold mineralization of the Xuefeng tectonic belt is concentrated in the Caledonian and Indosinian-Yanshanian periods,which is consistent with the view that the ore-forming fluids originated mainly from precipitation.Gold deposits in the Xuefeng tectonic belt belong to the metamorphic clastic rock type.

关 键 词：控矿因素 成矿机理 变质碎屑岩型 金矿 雪峰构造带 湘西 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]