| 北山石板井地区英云闪长岩-石英闪长岩体锆石U-Pb年龄、成因及对古洋盆俯冲作用时限的制约 |
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| 引用本文： | 修迪,陈超,专少鹏,申宗义,王金贵,程洲,张立国,王硕,杨鑫朋,侯德华,石光耀,张鹏程.北山石板井地区英云闪长岩-石英闪长岩体锆石U-Pb年龄、成因及对古洋盆俯冲作用时限的制约[J].地质通报,2018,37(6):975-986. |
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| 作者姓名： | 修迪 陈超 专少鹏 申宗义 王金贵 程洲 张立国 王硕 杨鑫朋 侯德华 石光耀 张鹏程 |
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| 作者单位： | 河北省区域地质调查院 |
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| 基金项目： | 中国地质调查局项目《阴山成矿带小狐狸山和雅布赖地区地质矿产调查》（编号：DD20160039） |
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| 摘 要： | 北山造山带中部石板井地区出露早古生代英云闪长岩-石英闪长岩体。用LA-ICP-MS技术测得该岩体石英闪长岩中锆石的206Pb/238U年龄为464.4±2.1Ma。岩石地球化学分析结果显示,岩石属钙碱性至高钾钙碱性、准铝质I型花岗岩。通过岩石成因分析,英云闪长岩-石英闪长岩体为来自地壳的岩浆与来自深部的亏损地幔岩浆,在高压(1.5GPa)、低温(719~792℃)条件下,经不均匀混合作用形成,同时有俯冲流体的加入,残留相为石榴子石+金红石(无角闪石)。岩石富集Rb、Ba、Th、U、K等大离子亲石元素,亏损Ta、Nb、P、Ti等高场强元素,显示出典型岛弧型花岗岩的地球化学特征。微量元素构造环境判别图进一步证明,岩体形成于岛弧环境。与南侧的红柳河-牛圈子-洗肠井古生代洋盆构成"沟-弧"体系,表明红柳河-牛圈子-洗肠井古洋盆在中奥陶世晚期已经向北俯冲,该洋盆闭合时限应晚于中奥陶世。
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| 关 键 词： | 北山造山带 石板井 英云闪长岩-石英闪长岩 锆石U-Pb定年 岩石成因 构造背景 |
| 收稿时间： | 2017/2/20 0:00:00 |
| 修稿时间： | 2017/4/10 0:00:00 |
Zircon U-Pb age and petrogenesis of tonalite-quartz diorite in the Shibanjing area, central Beishan orogenic belt, and its constraint on subduction of the ancient oceanic basin |
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| XIU Di,CHEN Chao,ZHUAN Shaopeng,SHEN Zongyi,WANG Jingui,CHENG Zhou,ZHANG Liguo,WANG Shuo,YANG Xinpeng,HOU Dehu,SHI Guangyao and ZHANG Pengcheng.Zircon U-Pb age and petrogenesis of tonalite-quartz diorite in the Shibanjing area, central Beishan orogenic belt, and its constraint on subduction of the ancient oceanic basin[J].Geologcal Bulletin OF China,2018,37(6):975-986. |
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| Authors: | XIU Di CHEN Chao ZHUAN Shaopeng SHEN Zongyi WANG Jingui CHENG Zhou ZHANG Liguo WANG Shuo YANG Xinpeng HOU Dehu SHI Guangyao and ZHANG Pengcheng |
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| Institution: | Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China,Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China and Hebei Regional Geological Survey Institute, Langfang 065000, Hebei, China |
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| Abstract: | |
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| Keywords: | Beishan orogenic belt Shibanjing tonalite-quartz diorite zircon U-Pb dating petrogenesis tectonic setting |
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