This paper is the third one of a series of three papers on the fluid evolution of the crust upper mantle and the causes of earthquakes. Based on the last two papers, a model of the crustal resistivity structure and t...This paper is the third one of a series of three papers on the fluid evolution of the crust upper mantle and the causes of earthquakes. Based on the last two papers, a model of the crustal resistivity structure and the deep seated fluid evolution is presented, and also a seismogeny theory is set up, which is called the potential kinetic energy transformation model. In this model, the crustal deep seated fluid evolution is considered to take the most important effect on the seismogenic process. Taking the Tangshan M 7.8 earthquake of 1976 as an example, the earthquakes occurred in a pull apart rifting basin are analyzed, and finally the crust outgassing in the seismogenic processes is discussed, referring to the here presented theory of seismogeny.展开更多
This paper is the first one of a series of three papers on the fluid evolution of the crust-upper mantle and the causes of earthquakes. Their relationship between the deep-seated fluids and the seismic activities are...This paper is the first one of a series of three papers on the fluid evolution of the crust-upper mantle and the causes of earthquakes. Their relationship between the deep-seated fluids and the seismic activities are discussed from aspects of their macoscopic scale, microscopic mechanism and dynamic behaviors in the three papers respectively. Based on magnetotelluric sounding (MT) measurements conducted by Chinese geophysicists in more than 20 years, the maps of the upper mantle conductive layer (MCL) with a buried depth of>50 km and the crustal conductive layer (CCL) with a buried depth of >15 km in the Chinese mainland are Presented in this paper. The resistivity structure, the causes of conductive layers in crust-mantle and the relationships between earthquake distribution and conductive layers are discussed.展开更多
This paper is the second one of a series of three papers on fluid evolution of the crust upper mantle and the causes of earthquakes. Based on the first paper, two conductive mechanisms of the crustal conductive layer...This paper is the second one of a series of three papers on fluid evolution of the crust upper mantle and the causes of earthquakes. Based on the first paper, two conductive mechanisms of the crustal conductive layer(CCL), graphite and supercritical saline aqueous fluids, are discussed. As there are difficulties for graphite model, the supercritical fluids are investigated in this paper concerning the phases, the electrically conductive behaviors, the evolution and the sealing mechanisms of the fluids. It is obvious that this model is reasonable to explain the geophysical and geochemical characteristics of the CCL presented in the first paper.展开更多
The 1°×1° distribution map of crustmantle structural ratio R for the lithosphere along the Longitudinal Seismic Belt of China has been compiled using computer based on the results of geophysical prospec...The 1°×1° distribution map of crustmantle structural ratio R for the lithosphere along the Longitudinal Seismic Belt of China has been compiled using computer based on the results of geophysical prospecting by previous researchers, and the latest results by the present authors. Based on this map, an insight into the structural features of the crustmantle assemblage along the Longitudinal Seismic Belt has been gained, while their relation to seismic activity and the distributions of geothermal flux and intracrustal high conductivitylow velocity layers, as well as their tectonic effect to seismicity have been discussed.展开更多
文摘This paper is the third one of a series of three papers on the fluid evolution of the crust upper mantle and the causes of earthquakes. Based on the last two papers, a model of the crustal resistivity structure and the deep seated fluid evolution is presented, and also a seismogeny theory is set up, which is called the potential kinetic energy transformation model. In this model, the crustal deep seated fluid evolution is considered to take the most important effect on the seismogenic process. Taking the Tangshan M 7.8 earthquake of 1976 as an example, the earthquakes occurred in a pull apart rifting basin are analyzed, and finally the crust outgassing in the seismogenic processes is discussed, referring to the here presented theory of seismogeny.
文摘This paper is the first one of a series of three papers on the fluid evolution of the crust-upper mantle and the causes of earthquakes. Their relationship between the deep-seated fluids and the seismic activities are discussed from aspects of their macoscopic scale, microscopic mechanism and dynamic behaviors in the three papers respectively. Based on magnetotelluric sounding (MT) measurements conducted by Chinese geophysicists in more than 20 years, the maps of the upper mantle conductive layer (MCL) with a buried depth of>50 km and the crustal conductive layer (CCL) with a buried depth of >15 km in the Chinese mainland are Presented in this paper. The resistivity structure, the causes of conductive layers in crust-mantle and the relationships between earthquake distribution and conductive layers are discussed.
文摘This paper is the second one of a series of three papers on fluid evolution of the crust upper mantle and the causes of earthquakes. Based on the first paper, two conductive mechanisms of the crustal conductive layer(CCL), graphite and supercritical saline aqueous fluids, are discussed. As there are difficulties for graphite model, the supercritical fluids are investigated in this paper concerning the phases, the electrically conductive behaviors, the evolution and the sealing mechanisms of the fluids. It is obvious that this model is reasonable to explain the geophysical and geochemical characteristics of the CCL presented in the first paper.
文摘The 1°×1° distribution map of crustmantle structural ratio R for the lithosphere along the Longitudinal Seismic Belt of China has been compiled using computer based on the results of geophysical prospecting by previous researchers, and the latest results by the present authors. Based on this map, an insight into the structural features of the crustmantle assemblage along the Longitudinal Seismic Belt has been gained, while their relation to seismic activity and the distributions of geothermal flux and intracrustal high conductivitylow velocity layers, as well as their tectonic effect to seismicity have been discussed.
