摘要
景谷大独田—一厂铜矿位于三江造山系的思茅凹陷盆地内,矿床成矿与构造-岩浆活动关系密切。通过对成矿地质特征及控矿因素的研究,认为铜矿(化)体均赋存于中三叠统火山沉积岩、碎屑岩、熔岩为主的地层中,矿化在古火山口或火山喷发中心尤为富集,矿床严格受控于火山机构;矿床明显受地层层位、岩性控制,铜矿化的多层性与火山活动周期性吻合,矿体主要产于三叠统宋家坡组中部;含矿地层岩性中蚀变作用明显,碳酸盐化、硅化、绿帘石化、绿泥石化等蚀变作用与成矿关系密切;矿床属于火山活动紧密相关的火山热液叠加改造铜多金属矿床,地层层位、岩性、氧化矿露头及围岩蚀变是有利的找矿标志。
The Jinggu Dadutian-Yichang copper deposit is located in the Simao sag basin of the Sanji⁃ang orogenic system.The mineralization of the deposit is closely related to tectonic-magma activity.Through the study of ore-forming geological characteristics and ore-controlling factors,it is considered that the cop⁃per ore(mineralization)bodies are all hosted in the strata dominated by volcanic sedimentary rocks,clastic rocks and lavas of the Middle Triassic.The mineralization is particularly enriched in the ancient crater or volcanic eruption center,and the deposit is strictly controlled by the volcanic mechanism.The deposit is ob⁃viously controlled by strata and lithology.The multi-layer of copper mineralization is consistent with the pe⁃riodicity of volcanic activity.The ore body is mainly produced in the middle of the Triassic Songjiapo Forma⁃tion.Alteration is obvious in the lithology of ore-bearing strata,and alteration such as carbonation,silicifica⁃tion,epidotization and chloritization is closely related to mineralization.The deposit is a volcanic hydrother⁃mal superimposed copper polymetallic deposit closely related to volcanic activity.The stratigraphic position,lithology,oxide outcrop and wall rock alteration are favorable prospecting criteria.
作者
杨金富
杨昌华
姜永果
沈良
YANG Jinfu;YANG Changhua;JIANG Yongguo;SHEN Liang(Geological Geophysical and Chemical Exploration Institute of Yunnan Nonferrous Geology Bureau)
出处
《现代矿业》
CAS
2024年第8期36-40,共5页
Modern Mining
关键词
铜矿
矿床特征
成矿规律
找矿标志
copper ore
deposit characteristics
metallogenic regularity
prospecting criteria
