| Methods for Calculation of Geogenetic Depth |
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| 作者姓名： | Lü Guxian |
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| 作者单位： | [1]SchoolofEarthandSpaceSciences,PekingUniversity,Beijing100871,China [2]InstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100081,China [3]FacultyofEarthSciences,ChinaUniversityofGeosciences,Wuhan430074,China [4]InstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100081,China |
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| 基金项目： | 国家科技发展重大项目，Program of Knowledge Renovation，国家自然科学基金 |
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| 摘 要： | Some current methods for the calculation of the geogenetic depth are based on the hydrostatic model, it is induced that the depth in certain underground place is equal to the pressure divided by the specific weight of rock, on the assumption that the rock is hydrostatic and overlain by no other force but gravity. However, most of rock is in a deformation environment and non-hydrostatic state, especially in an orogenic belt, so that the calculated depth may be exaggerated in comparison with the actual depth according to the hydrostatic formula. In the finite slight deformation and elastic model, the relative actual depth value from the 3-axis strain data was obtained with the measurement of strain including that of superimposed tectonic forces but excluding that of time factor for the strain. If some data on the strain speed are obtained, the depth would be more realistically calculated according to the rheologicai model because the geological body often experiences long-term creep strains.
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| 关 键 词： | 流体静力学 模型理论 地壳应力 重力 |
Methods for Calculation of Geogenetic Depth |
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| Liu Ruixun,Lü Guxian,Wang Fangzheng,Wei Changshan,Guo Chusun.Methods for Calculation of Geogenetic Depth[J].Journal of China University of Geosciences,2004,15(2):145-151. |
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| Authors: | Liu Ruixun Lü Guxian Wang Fangzheng Wei Changshan Guo Chusun |
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| Abstract: | Some current methods for the calculation of the geogenetic depth are based on the hydrostatic model, it is induced that the depth in certain underground place is equal to the pressure divided by the specific weight of rock, on the assumption that the rock is hydrostatic and overlain by no other force but gravity. However, most of rock is in a deformation environment and non-hydrostatic state, especially in an orogenic belt, so that the calculated depth may be exaggerated in comparison with the actual depth according to the hydrostatic formula. In the finite slight deformation and elastic model, the relative actual depth value from the 3-axis strain data was obtained with the measurement of strain including that of superimposed tectonic forces but excluding that of time factor for the strain. If some data on the strain speed are obtained, the depth would be more realistically calculated according to the rheological model because the geological body often experiences long-term creep strains. |
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| Keywords: | geogenetic depth ultrahigh pressure metamorphism hydrostatic model elastic dynamic model liquid-affecting fluid static model rheological dynamic model |
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