论文部分内容阅读
England利用实验室岩石流变性资料在模拟大陆地壳断陷和拉伸方面前进了一大步。依据橄榄石延性流动定义,他用一个具流变性的粘性薄板模拟拉伸大陆岩石圈的性态。通过对深度积分(从莫霍面到岩石圈底部(25公里)),计算了岩石连续变形所需要的单位长度作用力,即维持一定应变速率所需要的应力。仿效England的作法,作者把产生一定变形所需要的单位力定义为岩石圈的强度。尽管该定义并不严格,但是却很方便。拉伸作用中,应变率为常量或随时间而减少时,England的模型预测,由于坚硬上地幔的等温层减薄,岩石圈总
England used laboratory rheological data to make a big leap in simulating depressions and extensions in the continental crust. According to the definition of olivine ductile flow, he used a rheological viscous thin plate to simulate the behavior of the continental lithosphere. From the depth integral (from Moho to the bottom of the lithosphere (25 km)), the force per unit length required for continuous deformation of the rock was calculated, which is the stress required to maintain a certain strain rate. Following the example of England, the author defines the unit force required to produce a certain deformation as the strength of the lithosphere. Although this definition is not strict, it is very convenient. In the tensile effect, when the strain rate is constant or decreases over time, England’s model predicts that due to the thin isothermal layer thickness of the hard upper mantle, the total lithosphere