摘要
桂北银山岭花岗岩位于南岭钨锡多金属成矿带中段,距海洋山加里东期花岗岩体约2 km,该岩体内部发育有构造蚀变岩型锡铅锌多金属矿床。本文应用高精度锆石SHRIMPU-Pb法,获得银山岭中细粒含斑黑云母二长花岗岩体形成年龄为426.3±4.2Ma(98%可信度,MSWD=1.0),与其南部海洋山花岗岩岩基形成年龄基本一致,它们可能为加里东晚期同一构造岩浆活动的产物。根据银山岭锡铅锌多金属矿床本身特点,结合区域成矿时代分析,推测该矿床可能形成于印支期,银山岭岩体仅是赋矿围岩。
Yinshanling pluton is a small stock in the middle of Nanling metallogenic belt,internal of which exists a structural alteration-type Tin-polymetallic deposit.Zircon SHRIMP U-Pb dating of porphyrictic monzogranite therein shows Yinshanling stock formed at 426.3±4.2 Ma（MSWD=1.0）,which similar to Haiyangshan batholith in the south,furtherly indicates they both were intruded in late Caledonian.Based on the geological investigate of Yinshanling deposit,the Yingshanling pluton is only the hostrock of this tin-polymetallic deposit,which was probably formed in Indonisian.
出处
《华南地质与矿产》
CAS
2011年第2期85-89,共5页
Geology and Mineral Resources of South China
基金
中国地质调查局南岭地区锡矿选区评价与成果集成项目(1212010981028)资助
