| 江汉盆地河流碎屑锆石U-Pb年龄特征及其对物源研究的启示 |
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| 关键词:Jianghan Basin zircon U-Pb ages provenance tracing |
| 基金项目:国家自然科学基金项目(编号: 41972212) |
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| 摘要点击次数: 2714 |
| 全文下载次数: 2016 |
| 摘要: |
| Detrital Zircon U-Pb Age Characteristics of Main Rivers around Jianghan Basin and Implications of Provenance Tracing |
| Jianghan Basin, located in the north of the Yangtze Plate, is a key area for the study of the evolution of the Yangtze River. Zircon is a common accessory mineral in fluvial sediments, and its U-Pb age spectrum has been widely used in provenance tracing studies. However, it has not been systematically studied in Jianghan Basin. In this study, the U-Pb ages of 922 detrital zircons from 12 inflow rivers in the Jianghan Basin were analyzed using laser denudation inductively coupled plasma mass spectrometry (LA-ICP-MS). A multidimensional discriminant map (MDS) combined with the reported U-Pb ages of detrital zircons from rivers was employed to assess the U-Pb ages of detrital zircons from 12 inflow rivers. Further, the U-Pb age variation of detrital zircons from the main inflow rivers in Jianghan Basin was discussed herein. The U-Pb peak age composition of detrital zircons from the Yangtze River, Juzhang River, and Qingjiang River is different. The U-Pb age of detrital zircons in the Yangtze River and Hanjiang River, the two rivers with the largest sediment transport capacity in the Jianghan Basin, are different. The U-Pb age composition of detrital zircons in the Dabie Mountains is different from that of Hanjiang River and the Yangtze River. The U-Pb age composition of detrital zircons from the Mufu Mountains are different from the Yangtze River and the Xiangjiang River. The U-Pb age composition of detrital zircons from Qingjiang, Lishui and Yuanjiang rivers in the Wuling Mountains are different from Xiangjiang and Zijiang rivers. These differences reflect the influence of regional provenance on the sedimentary material composition of these streams. Therefore, the U-Pb ages of detrital zircons from the surrounding rivers of the Jianghan Basin have a good application prospect in the study of basin-mountain coupling and river evolution in the Jianghan Basin. |
| LIN Xu,WU Zhong-hai,ZHAO Xi-tao,ZHANG Yang,CHEN Ji-xin,LIU Hai-jin.2022.Detrital Zircon U-Pb Age Characteristics of Main Rivers around Jianghan Basin and Implications of Provenance Tracing[J].Acta Geoscientica Sinica,43(1):73-81. |
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