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广东阳春石菉铜矿区位于北东向吴川-四会断裂西南端,对矿床中黄铁(铜)矿化的花岗闪长岩进行锆石U-Pb年代学研究,获得了107.2±2.0 Ma的206Pb/238U加权平均年龄,与区内石菉岩体中两件非矿化花岗闪长岩的形成时代(分别为106.7±1.4 Ma和104.1±2.0 Ma)在误差内一致;石菉岩体侵入寒武系、泥盆系和石炭系,在接触带形成的矽卡岩发育程度与矿化程度具有明显的相关性,指示了石菉铜矿床的成矿作用与花岗闪长岩体的侵位密切相关。矿区内分布有燕山早期至燕山晚期的侵入岩,岩性由钾玄质系列过渡到钙碱性系列,反映了区域岩石圈伸展-拉张的构造背景。石菉铜矿床应是区域岩石圈伸展-拉张背景下岩浆作用的产物。
The Yangchun Shihon copper deposit in Guangdong Province is located in the northwestern direction to the Wuchuan-Sihui fault in the southwestern part of the study. U-Pb dating of pyrite (copper) mineralized granodiorite in the deposit was studied by zircon U-Pb dating of 107.2 ± 2.0 The 206Pb / 238U weighted average age of Ma is consistent with the formation times of two non-mineralized granodiorites (106.7 ± 1.4 Ma and 104.1 ± 2.0 Ma, respectively) Devonian and Carboniferous. The development degree of skarn formed in the contact zone has a clear correlation with the degree of mineralization, indicating that the mineralization of the Shi-Cu-Cu deposit is related to the granodiorite intrusion Closely related. There are intrusive rocks from early Yanshanian to late Yanshanian in the area, and the lithology transforms from K-form to K-alkali series, reflecting the tectonic setting of extensional-extensional lithosphere. The Shi-Cu-Cu deposit should be the product of magmatism under extensional-extensional lithospheric lithosphere.