| 新疆西天山吐拉苏—也里莫墩火山岩带年代学: 对加曼特金矿成矿时代的约束 |
| |
| 关键词:Jiamante gold deposit Early Carboniferous zircons U-Pb dating Tulasu-Yelimodun volcanic belt western Tianshan Mountains |
| 基金项目:中国地质调查局项目“西北地区重要成矿带基础地质综合研究”(编号: 1212010610319); “天山—兴蒙成矿带火山岩浆作用对成矿制约的综合研究”(编号: 1212010050503) |
|
| 摘要点击次数: 4275 |
| 全文下载次数: 4415 |
| 摘要: |
| The Chronology of Tulasu-Yelimodun Volcanic Belt: Constraints on the Metallogenic Epoch of the Jiamante Gold Deposit, Western Tianshan Mountains of Xinjiang |
| The Tulasu-Yelimodun volcanic belt is a key component part of the Late Paleozoic tectonic-magmatic metallogenic belt in the northern part of western Tianshan Mountains and strictly controls the temporal and spatial distribution of gold deposits within the ore belt. Based on geological data available, the authors measured the section of Dahalajunshan Formation volcanic host rocks of the Jiamante gold deposit in Yelimodun area, and the result shows that the volcanic strata are closely related to mineralization. LA-ICP-MS dating of zircons separated from dacite (the host rock of the gold deposit) yields a concordant 206Pb/238U age of 354.0±1.3 Ma(MSWD=1.4), suggesting that volcanic host rocks were formed in the Early Carboniferous, and the metallogenic epoch of the Jiamante gold deposit is constrained between 354.0±1.3 Ma and the Visean period of the Early Carboniferous. Regional correlation shows that there exist extensive intermediate-acidic volcanic-volcaniclastic rocks. Meanwhile, due to tectonic controls, there are differences in eruption time between the eastern and the western Tulasu-Yelimodun volcanic belt. |
| BAI Jian-ke,LI Zhi-pei,XU Xue-yi,RU Yan-jiao,LI Ting.2011.The Chronology of Tulasu-Yelimodun Volcanic Belt: Constraints on the Metallogenic Epoch of the Jiamante Gold Deposit, Western Tianshan Mountains of Xinjiang[J].Acta Geoscientica Sinica,32(3):322-330. |
| 查看全文 查看/发表评论 下载PDF阅读器 |