| 桂东北均洞花岗岩体的锆石U-Pb年龄、地球化学特征及其构造意义 |
| |
| 引用本文： | 高爱洋,时毓,刘希军,赵增霞,刘明辉,黄椿文.桂东北均洞花岗岩体的锆石U-Pb年龄、地球化学特征及其构造意义[J].高校地质学报,2022,28(2):225-239. |
| |
| 作者姓名： | 高爱洋 时毓 刘希军 赵增霞 刘明辉 黄椿文 |
| |
| 作者单位： | 1. 广西隐伏金属矿产勘查重点实验室 桂林理工大学，桂林 541004；
2. 桂林理工大学 有色金属矿产勘查与资源高效利用协同创新中心， 桂林 541004 |
| |
| 基金项目： | 广西杰出自然科学基金项目;国家自然科学基金 |
| |
| 摘 要： | 均洞花岗岩体出露于钦杭结合带西南部,对揭示桂东北构造演化具有重要意义,其岩石组合为石英黑云母闪长岩、黑云母二长花岗岩和黑云母二长岩.文章运用LA-ICP-MS锆石U-Pb测年方法,获得均洞岩体的结晶年龄为423～430 Ma,为加里东期造山作用的产物.均洞岩体的SiO2含量较低(55.47～62.95 wt％);其中一...
|
| 关 键 词： | 均洞花岗岩体 加里东期 地球化学 锆石U-Pb定年 构造环境 桂东北 |
LA-ICP-MS Zircon U-Pb Dating,Geochemical Characteristics and Tectonic Significance of Jundong Granites in Northeastern Guangxi |
| |
| GAO Aiyang,SHI Yu,LIU Xijun,ZHAO Zengxia,LIU Minghui,HUANG Chunwen.LA-ICP-MS Zircon U-Pb Dating,Geochemical Characteristics and Tectonic Significance of Jundong Granites in Northeastern Guangxi[J].Geological Journal of China Universities,2022,28(2):225-239. |
| |
| Authors: | GAO Aiyang SHI Yu LIU Xijun ZHAO Zengxia LIU Minghui HUANG Chunwen |
| |
| Institution: | 1. Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541004, China;
2. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin 541004, China; |
| |
| Abstract: | The Jundong granitic pluton is located in the southwest of the Qin-Hang belt, with the rock combination of dioritetonalite-granodiorite. In this study, we present LA-ICP-MS zircon U-Pb ages of granitic rocks from the Jundong pluton, the crystallization age of the Jundong rock body is 423-430 Ma, belonging to the Caledonian period. The rocks have lower SiO2 contents of 55.47-62.95 wt%. One of the samples belongs to the shoshonite series and the others are high-K calc-alkaline series. The A/CNK values are 0.70-1.18, showing as quasi-aluminous or peraluminous rocks. The rocks are enriched in large ion lithophile elements (LILE, e.g., Rb, Ba, Th and U) and relatively depleted in high field strength elements (HFSE, e.g., Nb, Ta, Sr, P and Ti) relative to primitive mantle. The Jundong granitic pluton are mixing products of different original rock sources and formed in the intracontinental collisional orogenic tectonic environment. |
| |
| Keywords: | Jundong granitic pluton Caledonian period geochemistry zircon U-Pb dating tectonic environment Northeastern Guangxi |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《高校地质学报》浏览原始摘要信息 |
| 点击此处可从《高校地质学报》下载免费的PDF全文 |
|
