| 华北克拉通东部鲁西早白垩纪基性岩墙成因:来自锆石年龄、地球化学和Sr-Nd-Hf同位素的证据 |
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| 引用本文： | 刘燊,冯彩霞,翟明国,胡瑞忠,赖绍聪,陈俊瑾,颜军.华北克拉通东部鲁西早白垩纪基性岩墙成因:来自锆石年龄、地球化学和Sr-Nd-Hf同位素的证据[J].岩石学报,2016,32(3):629-645. |
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| 作者姓名： | 刘燊 冯彩霞 翟明国 胡瑞忠 赖绍聪 陈俊瑾 颜军 |
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| 作者单位： | 大陆动力学国家重点实验室, 西北大学地质学系, 西安 710069;矿床地球化学国家重点实验室, 中国科学院地球化学研究所, 贵阳 550002,大陆动力学国家重点实验室, 西北大学地质学系, 西安 710069,大陆动力学国家重点实验室, 西北大学地质学系, 西安 710069,矿床地球化学国家重点实验室, 中国科学院地球化学研究所, 贵阳 550002,大陆动力学国家重点实验室, 西北大学地质学系, 西安 710069,青海省西宁市武警黄金第六支队, 西宁 810021,矿床地球化学国家重点实验室, 中国科学院地球化学研究所, 贵阳 550002 |
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| 基金项目： | This research was supported by the Opening Project of the State Key Laboratory of Ore deposit Geochemistry(201206), and National Natural Science Foundation of China(41373028, 41573022). |
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| 摘 要： | 中生代基性辉绿岩墙广泛分布于华北克拉通东部山东地区。本研究给出代表性岩墙的U-Pb锆石年龄、地球化学和Sr-Nd-Hf同位素证据,4个代表性锆石的LA-ICP-MS年龄范围处于121.9±0.6Ma和124.3±0.5Ma之间(早白垩纪)。岩石的主量元素组成变化较小,岩石富集轻稀土元素和大离子亲石元素(如,Rb、Ba、U、K和Pb),以及亏损高场强元素(如,Nb、Ta和Ti)。另外,基性岩墙具有相对一致的(87Sr/86Sr)i比值(~0.7098),负的εNd(t)值(-14.7~-14.5)、εHf(t)值(-31.4~-26.7)和高的Hf模式年龄(tDM1=1817~2024Ma)。研究显示基性岩墙来自富集岩石圈地幔的部分熔融作用,并在上升侵位过程中经历了一定程度的地壳混染作用影响。总体研究表明,基性岩墙的成因机制与扬子克拉通与华北克拉通的碰撞有关,岩浆源区为晚中生代前受俯冲扬子地壳沉积物交代后的富集岩石圈地幔。
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| 关 键 词： | 基性岩墙 拆沉 鲁西 华北克拉通 |
| 收稿时间： | 2014/10/30 0:00:00 |
| 修稿时间： | 2/2/2015 12:00:00 AM |
Zircon U-Pb age, geochemical, and Sr-Nd-Hf isotopic constraints on the origin of Early Cretaceous mafic dykes from western Shandong Province, eastern North China Craton, China. |
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| LIU Shen,FENG CaiXi,ZHAI MingGuo,HU RuiZhong,LAI ShaoCong,CHEN JunJin and YAN Jun.Zircon U-Pb age, geochemical, and Sr-Nd-Hf isotopic constraints on the origin of Early Cretaceous mafic dykes from western Shandong Province, eastern North China Craton, China.[J].Acta Petrologica Sinica,2016,32(3):629-645. |
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| Authors: | LIU Shen FENG CaiXi ZHAI MingGuo HU RuiZhong LAI ShaoCong CHEN JunJin and YAN Jun |
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| Institution: | State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China,State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China,No.6 Gold Geological Party of CAPF, Xining 810021, China and State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China |
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| Abstract: | |
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| Keywords: | Mafic dykes Foundering Western Shandong Province NCC |
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