| 鲁东胶莱盆地青山组火山岩的^40Ar—^39Ar定年——以五莲分岭山火山机构为例 |
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| 引用本文： | 刘洪,邱检生,王德滋,罗清华.鲁东胶莱盆地青山组火山岩的^40Ar—^39Ar定年——以五莲分岭山火山机构为例[J].高校地质学报,2001,7(3):351-355. |
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| 作者姓名： | 刘洪 邱检生 王德滋 罗清华 |
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| 作者单位： | 1. 南京大学内生金属矿床成矿作用国家重点实验室，南京 210093; 2. 南京大学地球科学系，南京 210093; 台湾大学 地质系，台北 106-17 |
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| 基金项目： | 国家自然科学基金项目(编号:49872028)资助 |
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| 摘 要： | 以五莲分岭山火山机构为例，运用高精度的^40Ar－^39Ar定年技术，对胶莱盆地青山组火山岩的形成年龄进行了精确测定。结果表明。青山组第一旋回中偏碱性富钾火山岩的形成年龄为109．9±0．6Ma，第二旋回酸性流纹质火山岩形成年龄为108．2±0．6Ma，据此确定胶莱盆地青山组火山岩应为早白垩世岩浆活动的产物。根据该组火山岩在空间上具有自西向东年龄渐新的演变趋势，表明中生代伊泽奈崎板块向欧亚板块碰撞俯冲应是制约区内火山活动的主要动力因素。
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| 关 键 词： | 青山组 火山岩 ^40Ar－^39Ar定年 鲁东胶莱盆地 火山机构 氩同位素 岩浆活动 |
| 文章编号： | 1006-7493(2001)03-351-05 |
| 收稿时间： | 2001-09-20 |
| 修稿时间： | 2001年4月23日 |
40Ar-39Ar Dating for Volcanic Rocks of Qingshan Formation in Jiaolai Basin, Eastern Shandong Province: A Case Study of the Fenlingshan Volcanic Apparatus in Wulian County |
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| QIU Jian sheng ,WANG De zi ,LO Qing Hua ,LIU Hong.40Ar-39Ar Dating for Volcanic Rocks of Qingshan Formation in Jiaolai Basin, Eastern Shandong Province: A Case Study of the Fenlingshan Volcanic Apparatus in Wulian County[J].Geological Journal of China Universities,2001,7(3):351-355. |
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| Authors: | QIU Jian sheng WANG De zi LO Qing Hua LIU Hong |
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| Institution: | 1. State Key Laboratory for Mineral Deposit Research, Nanjing University，Nanjing 210093; 2. Department of Earth Sciences，Nanjing University，Nanjing 210093; 3. Department of Geology National Taiwan University，Taibei106-17 |
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| Abstract: | Based on a case Study of the Fenlingshan volcanic apparatus, the formation ages of volcanic rocks of the Qingshan Formation in the Jiaolai Basin have been determined accurately by employing the highly precise 40Ar-39Ar dating technique． Investigation results demonstrate that the age of intermediate to alkaline potash-rich volcanic rocks of the first cycle of the Qingshan Formation is 109.9±0.6 Ma: and the age of the acidic rhyolitic volcanic rocks of the second cycle of the Qingshan Formation is 108.2±0.6Ma．It is thus evidenced that volcanic rocks of the Qingshan Formation in the Jiaolai volcanic Basin are products of Early Cretaceous magmatism. The ages of volcanic rocks of the Qingshan Formation in Shandong province display a progressively younger tendency eastwards，suggesting that the Mesozoic subduction of the Izanagi
plate towards the Eurasian plate is the main dynamic factor that controlled the volcanism in this region. |
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| Keywords: | volcanic rocks of Qingshan Formation 40 Ar- 39 Ar dating Jiaolai Basin eastern Shandong province |
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