摘要
岩石圈中的地压梯度是一个极为重要的参数 ,直接影响着各种地质作用的解释。与地温梯度一样 ,岩石圈中的地压梯度在空间和时间上也应是复杂多变的。文中通过热压系数建立岩石圈中的地温梯度与地压梯度之间的关系式 ,以此为基础 ,研究受地温梯度的影响岩石圈中的地压梯度的变化规律 ,得到的初步认识是 :岩石圈中的地压梯度是非线性的 ,静岩压力梯度是岩石圈中地压梯度的最小值 ,受地温梯度的影响岩石圈中地压梯度明显增加 ,可达到静岩压力梯度的 2倍以上。
The pressure gradient of the lithosphere is a key to explain various geological processes, and it changes complicatedly with time and space as the geothermal gradient does. The paper constructs a correlation formula for the pressure gradient and geothermal gradient in the lithosphere with the thermocompression coefficient. Based on this formula, the article has studied the contribution to the pressure gradient from the geothermal gradient in the lithosphere, and indicated that the pressure gradient in the lithosphere is nonlinear, and its minimum is the lithostatic gradient, and that the pressure gradient in the lithosphere will increase obviously because of the contribution of both geothermal gradient and weight of rocks, and can be twice more than the lithostatic gradient.
出处
《地学前缘》
EI
CAS
CSCD
2003年第3期129-133,共5页
Earth Science Frontiers
基金
国土资源部科技项目 (2 0 0 2 2 0 1)
教育部博士点基金项目 (1998)
国家自然科学基金资助项目 (4 9873 0 0 9)
关键词
岩石圈
地压梯度
地温梯度
超高压变质岩
lithosphere
pressure gradient
geothermal gradient
ultrahigh pressure metamorphic rock
