| 赣东北地区燕山晚期火山岩同位素年代学研究 |
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| 引用本文：王勇,管太阳,黄国夫,余达淦,陈丛林.2002.赣东北地区燕山晚期火山岩同位素年代学研究[J].地球学报,23(3):233-236. |
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| 基金项目:核工业科学基金(Y71961802)，核能资源研究开放实验室(H9508) |
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| 中文摘要:Rb-Sr,K-Ar及锆石U－Pb等同位素年代学研究表明，研究区燕山晚期火山岩的形成时限为91．7－128．3Ma，属早白垩世；基火山夺可分为2个岩浆活动旋回－石溪旋回与周家店旋回，其年龄分别为91．7－110．8Ma与119．2－128．3Ma，与赣杭构造－火山岩带2次主要的铀矿化年龄吻合，表明铀成矿与该时期岩浆活动具有密切关系。 |
| 中文关键词:火山岩 早白垩世 同位素年代学 铀矿化 赣东北 |
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| Isotope Chronological Studies of Late Yanshanian Volcanic Rocks in Northeast Jiangxi Province |
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| Abstract:The Rb Sr, U Pb and K Ar isotope chronology shows that the time limits of the late Yanshanian volcanic rocks are from 91.7 to 128.3 Ma. Two magmatic cycles can be recognized, i.e., Shixi cycle and Zhoujiadian cycle. Their formation ages are 128.3～ 119.2±1.3 Ma and 110.8±3.2～91.7 Ma, respectively, quite consistent with the ages of two main uranium mineralization stages of the Ganhang tectonic and volcanic rock belt. This shows that the Uranium mineralization is closely related to these two magmatic activities. |
| keywords:volcanic rocks early Cretaceous isotope chronology uranium mineralization northeast Jiangxi Province |
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