| 山东旧店金矿床花岗岩类锆石U-Pb年龄及对招平断裂带南段岩浆活动规律的约束 |
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| 引用本文： | 牛警徽, 田福泉, 邱敦方, 许道学, 范德江, 张永林, 崔青岐, 张鹏, 宋子崇, 王海红, 吴明刚, 钟世华. 2023. 山东旧店金矿床花岗岩类锆石U-Pb年龄及对招平断裂带南段岩浆活动规律的约束. 地质通报, 42(5): 813-827. doi: 10.12097/j.issn.1671-2552.2023.05.012 |
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| 作者姓名： | 牛警徽 田福泉 邱敦方 许道学 范德江 张永林 崔青岐 张鹏 宋子崇 王海红 吴明刚 钟世华 |
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| 作者单位： | 1.中国海洋大学海洋地球科学学院,山东 青岛 266100; 2.青岛金星矿业股份有限公司,山东 青岛 266748; 3.福建省政和县源鑫矿业有限公司,福建 南平 353600; 4.烟台黄金职业学院,山东 烟台 265401 |
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| 基金项目： | 国家自然科学青年基金项目《青海野马泉矿床成矿岩浆H2O和Cl含量精细研究：对矽卡岩矿床成因的约束》(批准号：42203066)；;山东省自然科学青年基金项目《磷灰石结晶对锆石微量元素成分的影响：以新疆维宝矿床为例》(编号：ZR2020QD027)； |
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| 摘 要： | 山东旧店金矿床位于胶东半岛招平断裂带南段,是以石英脉型矿化为主的中型金矿床。矿区内花岗岩类十分发育,类型多样,但是对这些花岗岩类的形成时代和成因一直缺乏深入研究,制约了对该矿床成矿地球动力学背景的认识。对该矿床4号、6号和12号矿脉出露的花岗质片麻岩、含石榴子石二长花岗岩、黑云二长花岗岩及花岗伟晶岩开展了详细的LA-ICP-MS锆石U-Pb定年,获得花岗质片麻岩年龄为709.1±4.1 Ma(6号脉),含石榴子石二长花岗岩年龄为164.1±1.9 Ma(4号脉),黑云二长花岗岩年龄为157.5±1.1 Ma(4号脉)和145.2±1.5 Ma(6号脉),花岗质伟晶岩年龄为146.5±0.7 Ma(12号脉)。综合野外地质特征和前人研究结果表明,旧店金矿床存在新元古代、晚侏罗世和早白垩世3期岩浆活动,其中晚侏罗世含石榴子石二长花岗岩和黑云二长花岗岩形成于岩石圈由挤压向伸展转变阶段,均为S型花岗岩,它们既是该矿床的赋矿岩体,同时可能也是成矿母岩。
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| 关 键 词： | 石英脉型 花岗岩类 旧店金矿床 LA-ICP-MS锆石U-Pb定年 胶东成矿带 |
| 收稿时间： | 2021-11-08 |
| 修稿时间： | 2023-04-09 |
Zircon U-Pb age of granitoids in the Jiudian gold deposit,Shandong Province and its constraints on the magmatic activity patterns in the southern section of the Zhaoping fault |
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| NIU Jinghui, TIAN Fuquan, QIU Dunfang, XU Daoxue, FAN Dejiang, ZHANG Yonglin, CUI Qingqi, ZHANG Peng, SONG Zichong, WANG Haihong, WU Minggang, ZHONG Shihua. 2023. Zircon U-Pb age of granitoids in the Jiudian gold deposit,Shandong Province and its constraints on the magmatic activity patterns in the southern section of the Zhaoping fault. Geological Bulletin of China, 42(5): 813-827. doi: 10.12097/j.issn.1671-2552.2023.05.012 |
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| Authors: | NIU Jinghui TIAN Fuquan QIU Dunfang XU Daoxue FAN Dejiang ZHANG Yonglin CUI Qingqi ZHANG Peng SONG Zichong WANG Haihong WU Minggang ZHONG Shihua |
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| Affiliation: | 1.College of Marine Geosciences,Ocean University of China,Qingdao 266100,Shandong,China; 2.Qingdao Jinxing Mining Co.Ltd.,Qingdao 266748,Shandong,China; 3.Fujian Zhenghe County Yuanxin Mining Co.LTD,Nanping 353600,Fujian,China; 4.Yantai Gold College,Yantai 265401,Shandong,China |
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| Abstract: | The Jiudian gold deposit from Shandong province is located in the south of the Zhaoping fault zone in Jiaodong Peninsula.It is a medium-sized gold deposit dominated by quartz-vein type mineralization.The granitoids in the district are widespread and of various types,but the formation ages and genesis of these granites have not been well studied,which limits the understanding of the metallogenic geodynamic background of this deposit.In this study,a detailed LA-ICP-MS zircon U-Pb dating of granite gneiss,garnet-bearing monzogranite,biotite monzogranite and granite pegmatite in Nos.4,6 and 12 veins of the Jiudian deposit shows that the granite gneiss age is 709.1±4.1 Ma(No.6),the garnet-bearing monzogranite is 164.1±1.9 Ma(No.4),the biotite monzogranite are 157.5±1.1 Ma(No.4)and 145.2±1.5 Ma(No.6),and the granitic pegmatite is 146.5±0.7 Ma(No.12).Combined with the geological characteristics and previous studies,it is indicated that there are three periods of magmatic activity in the Jiudian gold deposit:Neoproterozoic,Late Jurassic and Early Cretaceous.The Late Jurassic garnet-bearing monzogranite and biotite monzogranite are formed in lithosphere transition stage from extrusion to extend and they show characteristics of the S-type granite.They are not only the main host rocks of the deposit,but also may be the ore-forming rocks. |
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| Keywords: | quartz-vein type granitoid Jiudian gold deposit LA-ICP-MS zircon U-Pb dating Jiaodong metallogenic belt |
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