PRESSURE GRADIENT FROM THE CONTRIBUTION OF BOTH GEOTHERMAL AND GRAVITY IN THE LITHOSPHERE  

作　　者：HU Baoqun LU Guxian WANG Fangzhang SUN Zhanxue LIU Chengdong BAI Lihong 

机构地区：[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

出　　处：《Geotectonica et Metallogenia》2005年第2期128-138,共11页大地构造与成矿学（英文版）

基　　金：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

摘　　要：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.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.

关 键 词：LITHOSPHERE pressure gradient geothermal gradient ultrahigh pressure metamorphic rock 

分 类 号：P314[天文地球—固体地球物理学]