| Strontium isotopic geochemistry of the Changjiang estua-rine waters: Implications for water-sediment interaction |
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| 作者姓名： | 王中良 刘丛强 韩贵琳 徐志方 |
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| 作者单位： | WANG Zhongliang LIU CongqiangHAN Guilin & XU ZhifangState Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China;Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100101，China |
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| 基金项目： | This research was supported jointly by the Outstanding Young Scientists Foundation (Grant No.49625304)，the Ministry of Science and Technology of China (Grant No. 95-pre-39). Special thank go to Professor Qiao Guangsheng for his assistance in Sr isotopi |
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| 摘 要： | The Sr concentrations and 87Sr/86Sr ratios have been measured for the Changjiang es-tuarine waters with a main purpose to understand physical and chemical processes at the estuary. The result shows that the Changjiang River water has higher Sr concentration (150 ng/g) and lower 87Sr86Sr ratio (0.7105) when compared with the average values (0.7119 for 87Sr/86Sr and 78ppb for Sr, respectively) of large world rivers. In the mixing process, no simple mixing of two end-members has been found according to the variations of Sr concentration and isotope ratios. There is an abrupt rise of Sr isotope ratios at the salinity about 1 mg/g during river-sea water mixing at the estuary. This abrupt rise of Sr isotope ratios is mostly ascribed to the strong water-sediment interaction, because there exists the same rise of suspended particulate materials due to energetic resuspension of bottom sediments.
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Strontium isotopic geochemistry of the Changjiang estua-rine waters: Implications for water-sediment interaction |
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| WANG Zhongliang,LIU CongqiangHAN Guilin,& XU ZhifangState Key Laboratory of Environmental Geochemistry.Strontium isotopic geochemistry of the Changjiang estua-rine waters: Implications for water-sediment interaction[J].Science in China(Technological Sciences),2001(Z1). |
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| Authors: | WANG Zhongliang LIU CongqiangHAN Guilin & XU ZhifangState Key Laboratory of Environmental Geochemistry |
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| Affiliation: | WANG Zhongliang LIU CongqiangHAN Guilin & XU ZhifangState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100101,China |
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| Abstract: | The Sr concentrations and 87Sr/86Sr ratios have been measured for the Changjiang es-tuarine waters with a main purpose to understand physical and chemical processes at the estuary. The result shows that the Changjiang River water has higher Sr concentration (150 ng/g) and lower 87Sr86Sr ratio (0.7105) when compared with the average values (0.7119 for 87Sr/86Sr and 78ppb for Sr, respectively) of large world rivers. In the mixing process, no simple mixing of two end-members has been found according to the variations of Sr concentration and isotope ratios. There is an abrupt rise of Sr isotope ratios at the salinity about 1 mg/g during river-sea water mixing at the estuary. This abrupt rise of Sr isotope ratios is mostly ascribed to the strong water-sediment interaction, because there exists the same rise of suspended particulate materials due to energetic resuspension of bottom sediments. |
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| Keywords: | 87Sr/86Sr Changjiang estuary mixing water-sediment interaction |
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