| PRESSURE GRADIENT FROM THE CONTRIBUTION OF BOTH GEOTHERMAL AND GRAVITY IN THE LITHOSPHERE |
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| 作者姓名： | HU Baoqun LU Guxian WANG Fangzhang SUN Zhanxue LIU Chengdong BAI Lihong |
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| 作者单位： | [1]Institute of Geomechanics, Chinese Academy of Geological Sciences, Beo＇ing 100081, China, [2]Department of Geosciences, East China Institute of Technology, Fuzhou, JX344000, China [3]Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China |
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| 基金项目： | the Scientific Project of Ministry of Land and Resource of China，the National Natural Science Foundation of China，the Doctoral Station Foundation of Ministry of Education of China |
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| 摘 要： | 1 Introduction The pressure, a scalar quantity, is defined as P = F/S (F is force, S is the area for F) which can be widely used for both solid and fluid. The formula P = g ρh (g-gravitation acceleration,ρ-density, h-depth) is only used for even density static solid and fluid. The delivery of pressure in the fluid follows the law of Pascal, and the average pressure of uneven density fluid can be calculated with the formula of P = g ρh. The temperature influence on pressure is notHU Ba…
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| 关 键 词： | 压力梯度 地热 变质岩 岩石圈 |
| 文章编号： | 1006-513X（2005）02-0128-11 |
| 收稿时间： | 2005-01-25 |
| 修稿时间： | 2005-12-10 |
PRESSURE GRADIENT FROM THE CONTRIBUTION OF BOTH GEOTHERMAL AND GRAVITY IN THE LITHOSPHERE |
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| HU Baoqun LU Guxian WANG Fangzhang SUN Zhanxue LIU Chengdong BAI Lihong.PRESSURE GRADIENT FROM THE CONTRIBUTION OF BOTH GEOTHERMAL AND GRAVITY IN THE LITHOSPHERE[J].Geotectonicaet Metallogenia,2005,29(2):128-138. |
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| Authors: | HU Baoqun LU Guxian WANG Fangzhang SUN Zhanxue LIU Chengdong BAI Lihong |
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| Abstract: | The pressure gradient of the lithosphere is a key to explaining various geological processes, and varies also in time and space similar to the geothermal gradient. In this paper a correlation formula of geothermal gradients and pressure gradients was built with the thermocomprestion coefficients. Based on this formula, the article has studied the relation between the pressure gradients and the geothermal gradients in the lithosphere, and the results indicate that the pressure gradient in the lithosphere is nonlinear, and its minimum value is the lithostatic gradient, and that the pressure gradient of the lithosphere will increase obviously with the contribution of both geothermal and gravity, and could be twice times more than the lithostatic gradient. |
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| Keywords: | lithosphere pressure gradient geothermal gradient ultrahigh pressure metamorphic rock |
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