Materials of the International Conference
50th Anniversary of the International Geophysical Year
and Electronic Geophysical Year

16-19 September 2007 • Suzdal, Russia

Nonequilibrium dynamic system as the basic scheme of processes of oil generation, formation of large ore deposits and earthquakes generation

M. V. Rodkin and L. M. Labuntsova

Geophysical Center Russian Academy of Sciences, Moscow, Russia

Abstract

The important general feature of such different processes as earthquakes generation, oil genesis, and processes of formation of large ore deposits is the power-law self-similar character of distribution law typical of these systems. An example of such distribution is the well known magnitude-frequency Gutenberg-Richter law corresponding to the power-law distribution of number of earthquakes from their energy or seismic moment value. Similarly, it is known, that the essential share of hydrocarbons and ore deposits stocks is concentrated in a small number of a few largest deposits, and that dependence of a number of large deposits from their stock sizes corresponds to the power-law distribution. The question arises, what are the common features of these different processes that cause such specific distribution law. It is known, that the power law distribution is typical of highly nonequilibrium dynamic systems. Necessary feature of system generating such distribution law is an existence of a some sort of positive feedback between the current value of parameter and the rate of its further growth. Simple but fruitful approaches to the process of generation of power-law distribution law are the multiplicate cascade model and the theorems of limit distributions in the theory of probability. Results of the use of such approach in an examination of the mentioned above processes are discussed. In the case of the process of earthquakes generation such approach allows to model the tendency of a decrease in the slope of the magnitude-frequency curve in a vicinity of a strong earthquake. But the strong earthquake is treated in this approach as a casual event; thus, the opportunity of the overcoming of the contradiction between an existence of algorithms of statistically significant prognosis of earthquakes and the concept of unpredictability of earthquakes arises. The used approach gives ground to treat the process of oil generation as a work of non-equilibrium reactor where flows of fluid carry-in the energy and carry-out the oil components. The consequences of this model are compared with geological data and a good agreement is found. Whereas the biological remnants are treated as a source for oil generation in this model the typical features of the process are close to those suggested in terms of the abiological model of oil genesis. This result gives possibility to overcome a number of points of disagreement between the organic and deep abiological models of oil genesis. An important result of application of such approach was obtained also in an examination of a distribution law of oil deposits of moderate and small size. The use of the limit theorem gives possibility to specify the used distribution law of a number of deposits of moderate and small size explaining the observable deviations of a number of such deposits from their theoretically expected number. For the case of the process of formation of large and superlarge ore deposits the similarity in process of formation of superlarge and moderate and large deposits was shown, and an importance (necessity of occurrence of the mechanism) of positive feedback in this process of deposits formation was emphasized. Possible mechanism of realization of such positive feedback in the process of formation of some types of ore deposits is connected with the so called transmagmatic fluid flows.

Citation: M. V. Rodkin and L. M. Labuntsova (2007), Nonequilibrium dynamic system as the basic scheme of processes of oil generation, formation of large ore deposits and earthquakes generation, in: Materials of the International Conference '50th Anniversary of the International Geophysical Year and Electronic Geophysical Year', GC RAS, Moscow, doi:10.2205/2007-IGY50conf.

© 2007 Geophysical Center RAS and authors


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