| 辽东黄泥岭石英二长岩锆石U--Pb年代学、岩石地球化学及其成因 |
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| 引用本文： | 王广伟,孙国胜,余超,何欣,晋瑞香,赵天雪,刘承先,战乃臣.辽东黄泥岭石英二长岩锆石U--Pb年代学、岩石地球化学及其成因[J].世界地质,2018,37(4):1033-1046. |
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| 作者姓名： | 王广伟 孙国胜 余超 何欣 晋瑞香 赵天雪 刘承先 战乃臣 |
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| 作者单位： | 1. 吉林大学地球科学学院, 长春 130061;2. 辽宁省地质矿产调查院, 沈阳 110031 |
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| 基金项目： | 中国地质调查局"辽东一吉南成矿带永吉一凤城地区地质矿产调查"项目（DD20160049）. |
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| 摘 要： | 对华北克拉通东北缘、辽东黄泥岭岩体锆石U--Pb年代学和岩石地球化学的测试研究表明,黄泥岭岩体岩性为似斑状含辉石石英二长岩,锆石U--Pb加权平均年龄为174±0. 4 Ma,成岩时代为中侏罗世早期;岩石主量元素具有高Al、Ca、Na、Fe,低Mg特征;δEu弱-无负异常;富集Rb、Sr、Ba、Th、U等大离子亲石元素和LREE,亏损高场强元素Nb、Ta、Zr、Hf、Ti、HREE和相容元素V、Cr、Co、Ni,为"高Sr低Yb型"花岗岩。黄泥岭岩体为C型埃达克质岩,其岩浆来自于加厚基性下地壳的部分熔融。黄泥岭石英二长岩等中侏罗世早期C型埃达克质岩在华北克拉通东缘的大量分布表明,至少从中侏罗世初开始,古亚洲洋构造体系对本区的控制已经结束,环太平洋构造体系主导了本区的构造岩浆活动。
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| 关 键 词： | 黄泥岭岩体 石英二长岩 锆石U-Pb年代学 岩石地球化学 岩石成因 C型埃达克岩 |
| 收稿时间： | 2018-11-03 |
| 修稿时间： | 2018-12-06 |
Zircon U-Pb geochronology,petrogeochemistry and petrogenesis of adamellite in Huangniling area,eastern Liaoning |
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| WANG Guang-wei,SUN Guo-sheng,YU Chao,HE Xin,JIN Rui-xiang,ZHAO Tian-xue,LIU Cheng-xian,ZHAN Nai-chen.Zircon U-Pb geochronology,petrogeochemistry and petrogenesis of adamellite in Huangniling area,eastern Liaoning[J].World Geology,2018,37(4):1033-1046. |
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| Authors: | WANG Guang-wei SUN Guo-sheng YU Chao HE Xin JIN Rui-xiang ZHAO Tian-xue LIU Cheng-xian ZHAN Nai-chen |
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| Institution: | 1. College of Earth Sciences, Jilin University, Changchun 130061, China;2. Liaoning Survey Academy of Geology and Mineral Resources, Shenyang 110031, China |
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| Abstract: | Through petrogeochemistry,zircon U-Pb geochronology in Huangniling pluton from the northeastern margin of North China craton, it is indicated that the Huangniling pluton is composed of pyroxene adamellite. It formed during the Early Middle Jurassic with a weighted mean age of 174±0.4 Ma. The major elements of the adamellite are characterized by high Al,Ca,Na,Fe and low Mg, with negligible Eu anomalies. Huangniling pluton is enriched in large ion lithophile elements(LILE)(e.g.,Rb,Sr,Ba,Th,U and LREE),and depleted in high field strength elements(HFSE)(e.g.,Nb,Ta,Zr,Hf,Ti and HREE) and compatible element V,Cr,Co and Ni. The adamellite in Huangniling belongs to C-type adakite with high Sr and low Yb. The Huangniling pluton magma was derived mainly from partial melting of mafic rocks in thickened lower crust. The wide distribution of the Middle Jurassic C-type Adakite in the eastern margin of the North China craton,such as the Huanglinling adamellite,indicates that at least since Middle Jurassic, the control of the Paleo-Asian ocean tectonic system on the study area has ended. The circum-Pacific tectonic system dominates the structural magmatism in this area. |
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| Keywords: | Huangniling pluton adamellite zircon U-Pb geochronology geochemistry petrogenesis C-type adakite |
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