| 山东蒙阴坡里地区金伯利岩带形成时代——来自辉绿岩锆石U-Pb定年数据的证据 |
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| 引用本文： | 褚志远,王伟德,吕青,刘卫东,康丛轩,王树星.山东蒙阴坡里地区金伯利岩带形成时代——来自辉绿岩锆石U-Pb定年数据的证据[J].地质通报,2019,38(1):44-50. |
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| 作者姓名： | 褚志远 王伟德 吕青 刘卫东 康丛轩 王树星 |
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| 作者单位： | 山东省第七地质矿产勘查院, 山东 临沂 276006,山东省第七地质矿产勘查院, 山东 临沂 276006,山东省第七地质矿产勘查院, 山东 临沂 276006,山东省第七地质矿产勘查院, 山东 临沂 276006,中国地质调查局南京地质调查中心, 江苏 南京 210016,山东省第一地质矿产勘查院, 山东 济南 250014 |
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| 基金项目： | 山东省地矿局地质科技攻关项目《鲁西金刚石原生矿成矿规律及找矿方法研究》（编号：KY201602）、山东省科技厅基金项目《隐伏金刚石矿评价理论、方法与预测》（编号：2017CXGC1607）和中国地质调查局项目《华北和扬子地区金刚石矿产调查》（编号：12120114054301）、《安徽栏杆金刚石成矿规律与苏皖地区金刚石找矿靶区优选》（编号：DD20160059） |
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| 摘 要： | 金伯利岩是化学成分、矿物组成和结构多变的混杂岩,极易发生蚀变,因此对金伯利岩全岩及各种矿物进行测年的方法很难确定金伯利岩的侵位年龄,且数据结果差别很大。通过分析蒙阴坡里金伯利岩带与辉绿岩的侵入关系,以及辉绿岩锆石U-Pb测年,结合辉绿岩与上覆灰岩的接触关系及金刚石砂矿储集层与已知金刚石原生矿的关系,确定辉绿岩脉的侵位时代为中生代燕山晚期,证实坡里金伯利岩带形成时代为中生代燕山晚期而非加里东期。
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| 关 键 词： | 金伯利岩带 形成时代 中生代 坡里地区 |
| 收稿时间： | 2018/5/6 0:00:00 |
| 修稿时间： | 2018/7/18 0:00:00 |
The formation age of the kimberlite zone in Poli area of Mengyin, Shandong Province: Zircon U-Pb dating data of diabase |
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| CHU Zhiyuan,WANG Weide,L&#; Qing,LIU Weidong,KANG Congxuan and WANG Shuxing.The formation age of the kimberlite zone in Poli area of Mengyin, Shandong Province: Zircon U-Pb dating data of diabase[J].Geologcal Bulletin OF China,2019,38(1):44-50. |
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| Authors: | CHU Zhiyuan WANG Weide L&#; Qing LIU Weidong KANG Congxuan and WANG Shuxing |
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| Institution: | The Seventh Institute of Geology and Mineral Resources Exploration of Shandong, Linyi 276006, Shandong, China,The Seventh Institute of Geology and Mineral Resources Exploration of Shandong, Linyi 276006, Shandong, China,The Seventh Institute of Geology and Mineral Resources Exploration of Shandong, Linyi 276006, Shandong, China,The Seventh Institute of Geology and Mineral Resources Exploration of Shandong, Linyi 276006, Shandong, China,Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China and The First Institute of Geology and Mineral Resources Exploration of Shandong, Ji''nan 250014, Shandong, China |
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| Abstract: | Kimberlite is a kind of melange with changeable chemical composition, mineral composition and structure and tends to be altered. Therefore, it is difficult to determine the emplacement age of kimberlite by dating kimberlite whole rock and all kinds of minerals, and the data obtained are very different. In this paper, the intrusive relationship between kimberlite zone and diabase in Poli of Mengyin was analyzed. Through dating the zircon U-Pb in diabase and studying the contact relationship between diabase and overlying limestone as well as the relationship between diamond sand reservoir and known diamond protoores, the emplacement age of diabase vein was determined to be the Late Yanshanian period of Mesozoic. Therefore, it is proved that the Poli kimberlite belt was formed in Late Yanshanian rather than in Caledonian period. |
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| Keywords: | kimberlite belt formation period Mesozoic Poli area |
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