| A New SHRIMP Age of the Xiamaling Formation in the North China Plate and Its Geological Significance |
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| 作者姓名： | GAO Linzhi ZHANG Chuanheng SHI Xiaoying ZHOU Hongrui WANG Ziqiang SONG Biao |
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| 作者单位： | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;China University of Geosciences (Beijing), Beijing 100083, China;China University of Geosciences (Beijing), Beijing 100083, China;China University of Geosciences (Beijing), Beijing 100083, China;China University of Geosciences (Beijing), Beijing 100083, China;Beijing SHRIMP Central, 100037 Beijing, China |
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| 基金项目： | This study was supported by the National Natural Science Foundation of China (Grant No. 40621002 and Grant No. 2006FY120300-1) and the Program for Changjiang Scholars and Innovative Research Team in university (Grant No.IRT0546). |
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| 摘 要： | Setting up the hypostratotype of late Precambrian is the main aim of the research on the Meso- and Neoproterozoic in North China. The chronostratigraphic position is the key in this study. However, many key horizons have not been calibrated with the high-quality isotopic ages. Using the reported new U-Pb age with the Sensitive High-Resolution Ion Microprobe (SHRIMP II), a zircon U-Pb age was obtained of the ash bed in the Xiamaling Formation in North China Plate, yielding a weighted mean 206Pb/238U age of 1368±12 Ma. It is the first SHRIMP U-Pb age from the Xiamaling Formation in the North China Plate, and represents the depositing time of the middle part of the Xiamaling Formation. The zircon age plays an important role to understanding geological evolution of the North China Plate during Meso- and Neoproterozoic.
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| 关 键 词： | SHRIMP U-Pb Dating Mesoproterozoic Xiamaling Formation North China Plate |
| 收稿时间： | 2007/6/22 0:00:00 |
| 修稿时间： | 2007/11/20 0:00:00 |
A New SHRIMP Age of the Xiamaling Formation in the North China Plate and Its Geological Significance |
| |
| Authors: | GAO Linzhi ZHANG Chuanheng SHI Xiaoying ZHOU Hongrui WANG Ziqiang SONG Biao |
| |
| Abstract: | Setting up the hypostratotype of late Precambrian is the main aim of the research on the Meso- and Neoproterozoic in North China. The chronostratigraphic position is the key in this study.However, many key horizons have not been calibrated with the high-quality isotopic ages. Using the reported new U-Pb age with the Sensitive High-Resolution Ion Microprobe (SHRIMP H), a zircon UPb age was obtained of the ash bed in the Xiamaling Formation in North China Plate, yielding a weighted mean 206Pb/238U age of 1368±12 Ma. It is the first SHRIMP U-Pb age from the Xiamaling Formation in the North China Plate, and represents the depositing time of the middle part of the Xiamaling Formation. The zircon age plays an important role to understanding geological evolution of the North China Plate during Meso- and Neoproterozoic. |
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| Keywords: | SHRIMP U-Pb Dating Mesoproterozoic Xiamaling Formation North China Plate |
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