| Upper mantle convection driving by density anomaly and a test model |
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| 作者姓名： | 傅容珊 王景赟 常筱华 黄建华 戴志阳 查显杰 |
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| 作者单位： | School of Earth and Space Science，University of Science and Technology of China，School of Earth and Space Science，University of Science and Technology of China，School of Earth and Space Science，University of Science and Technology of China，School of Earth and Space Science，University of Science and Technology of China，School of Earth and Space Science，University of Science and Technology of China，School of Earth and Space Science，University of Science and Technology of China Hefei 230026，China，Hefei 230026，China，Hefei 230026，China，Hefei 230026，China，Hefei 230026，China，Hefei 230026，China |
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| 基金项目： | National Natural Science Foundation of China (40274033)，the Project of Knowledge Innovation Program of Chinese Academy of Sciences (KZCX3-SW-131). |
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| 摘 要： | Introduction Richter and Mckenzie (1978) supposed that there is a small-scale convection system in the mantle. For a long time lots of research provides observational data to infer the possibility of a small-scale convection in the upper mantle. For example, Haxby and Weissel (1986) discussed the relationship between SEASAT map and small-scale convection. Baudry and Kroenke (1991), Maia and Diament (1991) found that the geoid and bathymetry exhibit peaks in the 400~650 km range in the Pa…
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| 收稿时间： | 2 September 2003 |
| 修稿时间： | 8 October 2004 |
Upper mantle convection driving by density anomaly and a test model |
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| Fu Rong-shan , Wang Jing-yun , Chang Xiao-hua , Huang Jian-hua , Dai Zhi-yang and Zha Xian-jie.Upper mantle convection driving by density anomaly and a test model[J].Acta Seismologica Sinica(English Edition),2005,18(1):27-33. |
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| Authors: | Fu Rong-shan Wang Jing-yun Chang Xiao-hua Huang Jian-hua Dai Zhi-yang and Zha Xian-jie |
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| Institution: | School of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | A mathematic-physical convection model in upper mantle is established in this paper. This model is in a three di-mensional frame. Assume that the density anomalies, which are mapped from the seismic tomography data, are responding to the temperature perturbation in the connective system. This model takes the density anomalies as the driving force for the mantle convection. We solve the basic equations with different boundary conditions in a domination of wave number by using the FFT arithmetic. In order to test the validity of our theory and method two simple models (higher-lower density body and break off slab) are employed to calculate their flow patters in this paper. Results show that our method can be directly used to investigate the upper mantle convection patterns and its related problems of lithospheric dynamics. |
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| Keywords: | mantle convection dynamics seismic tomography |
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