| 内蒙古呼伦贝尔盟博克图南部变质堆晶角闪辉长岩的U-Pb锆石年龄及地质意义 |
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| 引用本文： | 张明,何会文.内蒙古呼伦贝尔盟博克图南部变质堆晶角闪辉长岩的U-Pb锆石年龄及地质意义[J].地质与资源,2007,16(1):56-58,67. |
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| 作者姓名： | 张明 何会文 |
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| 作者单位： | 内蒙古自治区地质调查院, 内蒙古 呼和浩特 010020 |
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| 基金项目： | 致谢：本文赖以讨论的各种资料均来自扎兰屯市幅1：25万区域地质调查报告,是项目组全体成员集体劳动的成果,同时在成文过程中得到中国地质大学（北京）许立权博士的精心指导,在此一并表示衷心的感谢. |
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| 摘 要： | 博克图南部的变质堆晶角闪辉长岩锆石U-Pb年龄测定结果为2096±36Ma，表明本区的变质堆晶角闪辉长岩形成于古元古代.结合岩石化学及岩石地球化学特征研究表明，岩石可能形成于俯冲环境，是造山作用过程中弧岩浆活动的早期产物，标志着区内一个新的构造岩浆旋回的开始，不能作为古元古代末期大陆裂解的产物.
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| 关 键 词： | 博克图 变质堆晶角闪辉长岩 锆石U-Pb年龄 地质意义 |
| 文章编号： | 1671-1947（2007）01-0056-04 |
| 收稿时间： | 2006-03-24 |
| 修稿时间： | 2006-04-26 |
THE U-Pb ZIRCON AGE OF THE META-CUMULUS BOJITE IN SOUTHERN BUGT,INNER MONGOLIA: Its Geological Implication |
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| ZHANG Ming,HE Hui-wen.THE U-Pb ZIRCON AGE OF THE META-CUMULUS BOJITE IN SOUTHERN BUGT,INNER MONGOLIA: Its Geological Implication[J].Geology and Resources,2007,16(1):56-58,67. |
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| Authors: | ZHANG Ming HE Hui-wen |
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| Institution: | Inner Mongolia Institute of Geological Survey, Hohhot 010020, China |
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| Abstract: | The U-Pb zircon age of the meta-cumulus bojite in southern Bugt, Inner Mongolia is detected to be 2096± 36 Ma. The result indicates that the rock was formed in Paleoproterozoic era. Study on the petrochemical and geochemical characteristics shows that it is the product in subduction environment, probably resulted from early volcanic arc magma activity during orogeny. It marks the beginning of a new tectonomagmatic cycle in the area. The rock may not be regarded as the result of the late Paleoproterozoic continental splitting. |
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| Keywords: | Bugt meta-cumulus bojite U-Pb zircon age geological implication |
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