| Detrital Zircon Ages of Hanjiang River： Constraints on Evolution of Northern Yangtze Craton, South China |
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| 引用本文： | 杨婕,高山,袁洪林,弓虎军,张红,谢士稳.Detrital Zircon Ages of Hanjiang River： Constraints on Evolution of Northern Yangtze Craton, South China[J].中国地质大学学报(英文版),2007,18(3):210-222. |
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| 作者姓名： | 杨婕 高山 袁洪林 弓虎军 张红 谢士稳 |
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| 作者单位： | Graduate School China University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources，Faculty of Earth Sciences，China University of Geosciences，Wuhan 430074，China，State Key Laboratory of Geological Processes and Mineral Resources，Faculty of Earth Sciences，China University of Geosciences，State Key Laboratory of Continental Dynamics，Department of Geology，Northwest University，State Key Laboratory of Continental Dynamics，Department of Geology，Northwest University，State Key Laboratory of Continental Dynamics，Department of Geology，Northwest University，Graduate School，China University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources，Faculty of Earth Sciences，China University of Geosciences，Wuhan 430074，China，Wuhan 430074，China，Wuhan 430074，China State Key Laboratory of Continental Dynamics，Department of Geology，Northwest University，Xi'an 710069，China，Xi'an 710069，China，Xi'an 710069，China，Xi'an 710069，China，Wuhan 430074，China |
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| 基金项目： | 国家自然科学基金，教育部资助项目 |
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| 摘 要： | Clastic sedimentary rocks are natural samples of the exposed continental crust over large areas. The Hanjiang (汉江) River drains the northern Yangtze craton,including the South Qinling (秦岭) belt and the northern parts of the Yangtze craton. Detrital zircons from this river thus provide an ideal sample for studying the formation and evolution of the northern Yangtze craton. Here we report laser ablation inductively coupled plasma mass spectrometer U-Pb ages of 122 detrital zircons from one sand sample of the Hanjiang River. The 110 concordant zircons reveal four major age groups of 768,444,212,and 124 Ma,which well correlate with known magmatic events in the northern Yangtze craton. A minor group is present at 1 536 Ma,which is less known in the study area. Only seven zircons have ages of >1 750 Ma. Our results show that the Early Paleozoic,Late Triassic,and Early Cretaceous are important episodes of zircon growth and crustal growth/reworking in addition to the previously documented Neoproterozoic event. Our results suggest very limited exposures of Paleoproterozoic and Archean rocks in the northern parts of the Yangtze craton.
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| 关 键 词： | 锆石 汉江流域 长江克拉通 地壳生长 |
| 收稿时间： | 28 March 2007 |
| 修稿时间： | 2007-03-28 |
Detrital Zircon Ages of Hanjiang River:Constraints on Evolution of Northern Yangtze Craton, South China |
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| Yang Jie,Gao Shan,Yuan Honglin,Gong Hujun,Zhang Hong,Xie Shiwen.Detrital Zircon Ages of Hanjiang River:Constraints on Evolution of Northern Yangtze Craton, South China[J].Journal of China University of Geosciences,2007,18(3):210-222. |
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| Authors: | Yang Jie Gao Shan Yuan Honglin Gong Hujun Zhang Hong Xie Shiwen |
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| Institution: | 1. Graduate School, China University of Geosciences, Wuhan 430074, China; State Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China;2. State Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China; State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, China;3. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, China;4. Graduate School, China University of Geosciences, Wuhan 430074, China; State Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | Clastic sedimentary rocks are natural samples of the exposed continental crust over large ideal sample for studying the formation and evolution of the northern Yangtze craton. Here we report laser ablation inductively coupled plasma mass spectrometer U-Pb ages of 122 detrital zircons from one sand sample of the Hanjiang River. The 110 concordant zircons reveal four major age groups of 768,444, 212, and 124 Ma, which well correlate with known magmatic events in the northern Yangtze craton. A minor group is present at 1 536 Ma, which is less known in the study area. Only seven zircons have ages of ＞1 750 Ma. Our results show that the Early Paleozoic, Late Triassic, and Early Cretaceous are important episodes of zircon growth and crustal growth/reworking in addition to the previously documented Neoproterozoic event. Our results suggest very limited exposures of Paleoproterozoic and Archean rocks in the northern parts of the Yangtze craton. |
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| Keywords: | detrital zircon U-Pb age Yangtze craton Hanjiang River crustal growth/reworking |
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