大别超高压变质岩折返过程中的部分熔融作用

研究表明，在大别超高压变质岩的折返过程中，超高压变质岩一方面要经受中下地壳所特有的角闪岩相退变质作用，另一方面要在合适环境下发生部分熔融作用，超高压变质岩在中下地壳的减爱变和部分熔融作用，是一个重要的物理化学过程，它可以降低岩石的强度，提高岩石的可变性，促进挤压（碰撞）体制向伸展体制的转变。超高压变质岩折返过程减压退变和部分熔融作用的确定，进一步支持了“原地”观点。它不仅说明了超高压榴辉岩石和围岩

PARTIAL MELTING IN EXHUMATION OF ULTRAHIGH PRESSURE METAMORPHIC ROCKS, DABIESHAN MOUNTAINS, CHINA

Natural fractures can be observed macroscopically and/or microscopically in the natural world. These natural fractures show a great number of universal and common features. The similarities between the natural fracture process in the alloy at the microscopic level and the strong earthquake formation process at the macroscopic level can be applied to the research into the seismogenic mechanism in terms of fracture environment, nonlinear features in the fracture process and impending behaviors. This application therefore provides us with a new experimental method and evidence for the research into the strong seismogenic mechanism.