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粤中三水盆地喜山期银矿化粗面质凝灰岩中锆石LA-ICP-MSU-Pb年龄90～3175Ma。火山岩中锆石主要为其在形成及上升过程中捕获围岩中的碎屑锆石。火山岩中锆石U-Pb年龄表明粤中三水盆地基底含太古宙的残余锆石(2489Ma±30Ma,3175Ma±38Ma),华夏陆块元古宙基底存在与Grenville造山运动相对比的构造岩浆事件(955～1148Ma)及在新元古代(798Ma±12Ma,883Ma±10Ma)发生了较强烈的岩浆活动。粤中三水盆地经历了加里东期构造岩浆事件(438.0Ma±6.8Ma),之后至少经历了燕山早期(～160Ma)、燕山晚期(98.2Ma±1.1Ma)及喜山期3次构造岩浆事件。三水盆地多期次构造岩浆活动与成矿事件有一定的耦合关系,是控制矿床形成的主要因素。华南褶皱带岩浆活动强烈,经历新生代成矿作用,中新生代盆地边缘是找矿有利靶区。
The zircon LA-ICP-MSU-Pb ages of 90 ~ 3175Ma in the Himalayan silver mineralized rough tuff in the Sanshui Basin of Guangdong Province. The zircons in volcanic rocks are mainly those that captured the detrital zircons in the surrounding rock during its formation and ascent. U-Pb ages of zircons in volcanic rocks indicate that Archean remnant zircons (2489Ma ± 30Ma, 3175Ma ± 38Ma) are found in the basement of the Sanshui Basin in Guangdong, and tectonomagmatic events in the Paleo-Proterozoic basement of the Huaxia block are in contrast with the Grenville orogeny (955 ~ 1148Ma) and the Neoproterozoic (798Ma ± 12Ma, 883Ma ± 10Ma) occurred more intense magmatic activities. The Southeastern basin of Guangdong experienced the Caledonian tectonomagmatic event (438.0Ma ± 6.8Ma) and experienced at least three tectono-magmatic events during the early Yanshanian period (-160Ma), the late Yanshanian period (98.2Ma ± 1.1Ma) and the Himalayan period . The multistage tectonic magmatism in Sanshui Basin has a certain coupling relationship with the metallogenic event and is the main factor controlling the formation of the deposit. The South China fold belt has a strong magmatic activity and undergoes Cenozoic mineralization. The Meso-Cenozoic basin margin is a favorable prospecting target.