| 燕辽地区长城系串岭沟组及团山子组沉积时代的新制约 |
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| 引用本文： | 张拴宏,赵越,叶浩,胡健民,吴飞.燕辽地区长城系串岭沟组及团山子组沉积时代的新制约[J].岩石学报,2013,29(7):2481-2490. |
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| 作者姓名： | 张拴宏 赵越 叶浩 胡健民 吴飞 |
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| 作者单位： | 国土资源部古地磁与古构造重建重点实验室,中国地质科学院地质力学研究所,北京100081 |
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| 基金项目： | 本文受科技部973项目(2012CB416604)及中国地质调查局地质矿产调查评价专项项目(1212011121070)联合资助. |
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| 摘 要： | 华北克拉通北部燕辽地区是长城系地层出露最全的标准建组地区之一.近年来研究结果表明长城系地层底界年龄比以往所认为的18亿年明显年轻.新的锆石LA-ICP-MS U-Pb测年结果显示,平谷熊耳寨团山子组上部钾质火山岩的锆石207 Pb/206 Pb加权平均年龄为1637±15Ma(95％置信度,N=15,MSWD=0.75),一致年龄为1641±4Ma(1σ,N=14,MSWD=0.12),限定了团山子组上部的沉积时代.蓟县青山岭侵位于串岭沟组地层内闪长玢岩脉的锆石207 Pb/206Pb加权平均年龄为1634±9Ma(95％置信度,N=17,MSWD=0.40),表明串岭沟组地层沉积发生在1634±9Ma之前.结合前人大红峪组火山岩的研究结果还表明,燕辽拗拉槽(裂谷)钾质火山岩的喷发开始于1637±15Ma,在大红峪期(～1625Ma)达到高潮.
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| 关 键 词： | 锆石U-Pb定年 串岭沟组 团山子组 长城系 燕辽拗拉槽(裂谷) 华北克拉通 |
| 收稿时间： | 3/1/2013 12:00:00 AM |
| 修稿时间： | 5/4/2013 12:00:00 AM |
New constraints on ages of the Chuanlinggou and Tuanshanzi formations of the Changcheng System in the Yan-Liao area in the northern North China Craton |
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| ZHANG ShuanHong,ZHAO Yue,YE Hao,HU JianMin and WU Fei.New constraints on ages of the Chuanlinggou and Tuanshanzi formations of the Changcheng System in the Yan-Liao area in the northern North China Craton[J].Acta Petrologica Sinica,2013,29(7):2481-2490. |
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| Authors: | ZHANG ShuanHong ZHAO Yue YE Hao HU JianMin and WU Fei |
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| Institution: | MLR Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;MLR Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;MLR Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;MLR Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;MLR Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| Abstract: | |
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| Keywords: | Zircon U-Pb dating Chuanlinggou Formation Tuanshanzi Formation Changcheng System Yan-Liao aulacogen (rifting) North China Craton |
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