华南地质2025，Vol.41Issue(4)：755-772,18.DOI:10.3969/j.issn.2097-0013.2025.04.007
粤东玉水铜矿凝灰岩岩石学和年代学特征及区域找矿意义
Petrology and Age of Tuff in Yushui Copper Deposit of East Guangdong and Its Regional Ore Prospecting Significance
摘要
Abstract
The tuff interlayers within the Carboniferous sandstone of the floor of the Yushui Copper Deposit in Meizhou,Guangdong,are closely associated with mineralization.Investigating their genesis is of significant importance for understanding the origins of similar regional deposits and guiding ore exploration.The tuff is primarily composed of sericite,with quartz and feldspar as secondary minerals,and contains a small amount of detrital particles.Stratiform chalcopyrite is developed along the layering.Based on underground surveys and documentation,this study employed LA-ICP-MS to conduct U-Pb dating of zircons from the tuff.The obtained ages are mainly concentrated around～440 Ma,800-1 200 Ma,and>1 600 Ma.Comprehensive research indicates that the source materials contemporaneous with the tuff likely originated from the northeastern direction of the basin.The zircon ages suggest the presence of Precambrian basement material in the deep part of the study area.Volcanism is developed in the Yongmei Depression area,and this phase of volcanic activity is closely related to mineralization.It can provide effective clues for prospecting regional layered deposits and can be extended to most depression zones in South China.关键词
石炭纪火山岩/凝灰岩/碎屑锆石U-Pb年龄/裂谷盆地/玉水铜矿Key words
Carboniferous volcanic rocks/tuff/detrital zircon U-Pb age/rift basin/Yushui copper deposit分类
天文与地球科学引用本文复制引用
陈港,柯昌辉,陈懋弘,彭永新,张威,左俊增..粤东玉水铜矿凝灰岩岩石学和年代学特征及区域找矿意义[J].华南地质,2025,41(4):755-772,18.基金项目
中国地质调查局地质调查项目(DD20201173、DD20243443) （DD20201173、DD20243443）
