Barrier Effect of Degassing and Destruction of the Earth's Crust

摘要

Modeling of seismic activity is carried out in monolithic samples by providing mechanical stress and influencing with weak external fields. Previously, the samples were under normal conditions [1]. The realistic state of the geological medium is different. We can judge about this from data of superdeep drilling and estimates of the rheological properties of materials by depth [2, 3]. The developed fissuring and internal stressed state characteristic of the medium manifest themselves in the superdeep borehole during self-destruction of the core. This can also occur at great depths as progressive disking to very small sizes, which cannot be related to stress relief of the medium. Another peculiarity of the system, which cannot be modeled by loading the samples, is the fast and various variations of the volume stressed state (VSS), which are considered as the response of the medium to the interaction of ascending fluxes of light gases (hydrogen, helium) with the solid phase. This interaction significantly influences the structure and dynamic behavior of materials and the geological medium [4, 5]. The similarity in the structure and dynamic phenomena in the medium can be observed in the laboratory samples in the conditions of nonstationary processes characteristic of the peculiar geological medium. In this work, we shall show the reflection of nonstationary processes in the samples, which are caused by degassing of light gases in the geological medium related to the P-T-conditions and influencing the structures and variations of the VSS of the medium.