| Ye Yuguang,Gao Juncheng,He jie,Diao Shaobo,Liu Xinbo,Du Yajing. 1991. ESR and U-series ages of coral reef samples from shallow drill holes in the South China Sea. Acta Oceanologica Sinica, (3):423－431 |
| ESR and U-series ages of coral reef samples from shallow drill holes in the South China Sea |
| ESR and U-series ages of coral reef samples from shallow drill holes in the South China Sea |
| Received:September 22, 1990 Revised:October 27, 1990 |
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| Author Name | Affiliation | | Ye Yuguang | Institute of Marine Geology, Ministry of Geology and Mineral Resources, Qingdao, 266071, China | | Gao Juncheng | National Institute of Metrology, Beijing, 100013, China | | He jie | Institute of Marine Geology, Ministry of Geology and Mineral Resources, Qingdao, 266071, China | | Diao Shaobo | Institute of Marine Geology, Ministry of Geology and Mineral Resources, Qingdao, 266071, China | | Liu Xinbo | Institute of Marine Geology, Ministry of Geology and Mineral Resources, Qingdao, 266071, China | | Du Yajing | National Institute of Metrology, Beijing, 100013, China |
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| Abstract: |
| The ages of coral reef samples from several shallow drill holes in the South China Sea are determined by ESR and U-series (230Th/234U) methods. The experimental results show ideal agreement between ESR and U-series ages and that the coral reefs were formed in the early Holocene. In the determination of natural total dose of coral reef by use of the additive dose method good results can be obtained by exponential fitting, no matter how the effect of dose saturation is. It was found that the ratio of the natural ESR signal intensity (I0) to the ESR signal intensity at dose saturation (Imax) of sample can reflect the significance of a irradiation efficiency-k value. Using the k value of sample determined by the formula given in this paper, the precision of ESR dating of marine carbonates can be improved. |
| 中文摘要: |
| The ages of coral reef samples from several shallow drill holes in the South China Sea are determined by ESR and U-series (230Th/234U) methods. The experimental results show ideal agreement between ESR and U-series ages and that the coral reefs were formed in the early Holocene. In the determination of natural total dose of coral reef by use of the additive dose method good results can be obtained by exponential fitting, no matter how the effect of dose saturation is. It was found that the ratio of the natural ESR signal intensity (I0) to the ESR signal intensity at dose saturation (Imax) of sample can reflect the significance of a irradiation efficiency-k value. Using the k value of sample determined by the formula given in this paper, the precision of ESR dating of marine carbonates can be improved. |
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