| 吉林安图刘生店钼矿床辉钼矿Re-Os同位素定年及其地质意义 |
| |
| 关键词:Re-Os dating molybdenite porphyry molybdenum deposit Liushengdian molybdenum deposit Antu area of Jilin province |
| 基金项目:中国地质调查局项目(编号: 1212011085485)；吉林大学基本科研业务费项目(编号: 200903025) |
|
| 摘要点击次数: 4629 |
| 全文下载次数: 5512 |
| 摘要: |
| Re-Os Dating of Molybdenite from the Liushengdian Molybdenum Deposit in Antu Area of Jilin Province and Its Geological Significance |
| The Liushengdian ore deposit is one of the porphyry molybdenum deposits recently discovered in eastern Jilin Province. Re-Os dating of six molybdenite samples collected from typical ores shows that the Re and Os values of samples vary between 9.88 and 11.37μg.g-1 and between 27.68 and 32.40ng.g-1 respectively; the model age ranges from (168.0±2.3) to (170.8±2.5)Ma, with the weighted mean age being (169.36±0.97)Ma(MSWD=0.73), and the isochron age being (185±12) Ma (MSWD=0.72). The results indicate that molybdenum mineralization took place in middle Jurassic, roughly contemporaneous with that of Daheishan and Fuanpu molybdenum deposits, which belong to the Xiao Hinggan Mountains-Zhangguangcai Mountain metallogenic belt. These ore deposits were formed by the large-scale Yanshanian metallogenic activity in the eastern part of northeastern China, influenced by the subduction of the Pacific plate. In addition, the Re content of the molybdenite suggests that the ore-forming materials might have been derived mainly from the crust with the participation of small amounts of mantle materials. |
| WANG Hui,REN Yun-sheng,ZHAO Hua-lei,JU Nan,QU Wen-jun.2011.Re-Os Dating of Molybdenite from the Liushengdian Molybdenum Deposit in Antu Area of Jilin Province and Its Geological Significance[J].Acta Geoscientica Sinica,32(6):707-715. |
| 查看全文 查看/发表评论 下载PDF阅读器 |