CAJ | 학술논문

菉广东阳春石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，菉与区内石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，菉指示了石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-菉拉张的构造背景。石铜矿床应是区域岩石圈伸展-拉张背景下岩浆作用的产物。
록엄동양춘석동광구위우북동향오천-사회단렬서남단，대광상중황철(동)광화적화강섬장암진행고석 U-Pb 년대학연구，획득료107.2±2.0 Ma적206Pb/238U가권평균년령，록여구내석암체중량건비광화화강섬장암적형성시대(분별위106.7±1.4 Ma화104.1±2.0 Ma)재오차내일치；석록암체침입한무계、니분계화석탄계，재접촉대형성적석잡암발육정도여광화정도구유명현적상관성，록지시료석동광상적성광작용여화강섬장암체적침위밀절상관。광구내분포유연산조기지연산만기적침입암，암성유갑현질계렬과도도개감성계렬，반영료구역암석권신전-록랍장적구조배경。석동광상응시구역암석권신전-랍장배경하암장작용적산물。
The Shilu copper deposit in Yangchun city, Guangdong province is located at southwest of the NNE-strike Wuchuan-Sihui fault. LA-ICP-MS U-Pb dating of zircons from a pyrite (-chalcopyrite)-mineralized granodiorite sample from the Shilu Copper deposit yielded a weighted mean 206Pb/238U age of 107.2±2.0 Ma, consistent with the results obtained from two non-mineralized granodiorite samples of the Shilu pluton (106.7±1.4 Ma and 104.1±2.0 Ma, respectively) within analytical errors. This indicates that the mineralization was closely related to the emplacement of the granodiorite pluton. Early to Late Yanshanian shoshonitic to calc-alkaline intrusive rocks are widespread in the Shilu area, suggestive of a lithospheric extension tectonic setting. Accordingly, the formation of the Shilu copper deposit might have resulted from the magmatic activity induced by this lithospheric extension.