Low velocity zones of thermobaric origin in the crystalline crust

Автор(и)

  • V. Korchin S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Kyiv, Україна

DOI:

https://doi.org/10.24028/gzh.0203-3100.v37i5.2015.111145

Ключові слова:

physical properties, low velocity zones, thermal regimes, decompaction of rocks, porosity, hydrocarbons localization

Анотація

The paper presents a new hypothesis of origin, existence and disappearance of crustal low velocity zones (LVZs), discovered the DSS method as elastic anomalies of the Earth’s crust. Complex changes are experimentally obtained for VР,S=f(PT) in rocks (regions of velocity inversion are revealed). There is cataclastic decompaction of mineral medium in them — dilatancy phenomenon. Their configuration, location and thermodynamic conditions coincide well with the DSS elastic anomalies. They arise only when the temperature gradient exceeds the certain threshold in the crust and the pressure cannot compensate thermal disturbances of rocks.. The presence of LVZs is the objective reality and they can occur everywhere in the Earth’s crust. Their thickness can increase due to the increase of intensity of thermal regimes or the zones can disappear due to lowering heat in the lithosphere. Based on the study of relationship between pore space and velocity, an increase is revealed in rocks porosity and joint with depth of the LVZs that stipulates increasing migration and localization of different fluids and hydrocarbons of a deep origin. The LVZs and related to them deep events and processes are the most accessible to study using different geological-geophysical methods, including super-deep drilling. This makes it possible to perform the most detailed and promising studies aiming to search for mineral resources and clarify the deep structure of the Earth, as well as to explain and predict crustal earthquakes.

Посилання

Ahlers D. J., 1968. Using measurements of the speed of sound to determine the Debye temperature in the solid. In: Lattice dynamics. Moscow: Mir, P. 13—61 (in Russian).

Burtnyy P. A., Korchin V. A., Karnaukhova E. E., 2013. Modelling material composition of the deep horizons of the earth's crust (a new concept of interpretation of geophysical data). LAP Lambert Akadem. Publ., 188 p. (in Russian).

Geguzin Ya. E., Krivoglaz M. A., 1971. Movement macroscopic inclusions in solids. Moscow: Metallurgiya, 344 p. (in Russian).

Gerasimov M. E., Kobolev V. P., Lukin A. E., 2009. Azov-Black Sea landfill studying geodynamics and fluid dynamics of formation of oil and gas fields. Geofizicheskiy zhurnal 31(6), 167—170 (in Russian).

Kola ultradeep, 1984. Ed. E. A. Kozlovskiy. Moscow: Nedra, 490 p. (in Russian).

Korchin V. A., 2011а. Influence of thermal conditions of the Earth's crust in the area of low seismic velocity. Proceedings of the International Conference "Sixth scientific readings memory Yu. P. Bulashevich". Ekaterinburg, P. 199—201 (in Russian).

Korchin V. A., 2013a. Crustal low-velocity zone — promising horizons of localization of deep hydrocarbon. Glubinnaya neft 1(8), 1099—1116 (in Russian).

Korchin V. A., 2011b. Petrophysical characteristics of zones of low seismic velocities in the crust and thermobaric instability. Proceedings of the XVII All-Russian conference with international participation "Problems seismotectonics", September 20—22, 2011, Moscow. P. 273—277 (in Russian).

Korchin V. A., 2007. Structural features of mineral sroedy in PT conditions of different depths of the Earth's crust. Geofizicheskiy zhurnal 29(3), 49—77 (in Russian).

Korchin V. A., 2014. Thermobaric modeling anomalies increased porosity in the rocks of the crust — the possible horizons of migration and localization of deep hydrocarbon. Glubinnaya neft 2(9), 1434—1448 (in Russian).

Korchin V. A., 2010a. Thermobaric petrophysical modeling of the earth's crust with low-velocity zones. Physical and chemical and petrophysical studies in Earth Sciences. Proceedings of the 11th International Conference. Moscow. P. 147—150 (in Russian).

Korchin V. A., 2013b. Thermodynamics crustal zones of low seismic velocity (a new scientific hypothesis). Saarbrücken: Lambert Akadem. Publ., 280 p. (in Russian).

Korchin V. A., 2012. Elastic-thermobaric density stratification of the lithosphere, crustal zone of low seismic velocity. Proceedings of the III tectonophysical conference in IPE RAS "Tectonophysics and topical issues of Earth Sciences", 8—12 October 2012, Moscow. Vol. 2. P. 390—393 (in Russian).

Korchin V. A., Burtnyy P. A., Kobolev V. P., 2013. Thermobaric petrophysical modeling in geophysics. Kiev: Naukova Dumka, 312 p. (in Russian).

Korchin V. O., 2011с. Areas of low seismic velocities in the crust and petrophysical characteristics. Geodynamika (2), 122—124 (in Ukrainian).

Korchin V. O., 2010b. Crustal thermobaric transformation of mineral substances and the associated seismic vertical stratification of the lithosphere. Geodynamika (1), 50—56 (in Ukrainian).

Kuzin A. M., 2010. Concept hydrocarbon degassing of the Earth in the interpretation of seismic data. International scientific-practical conference "Modern methods of seismic exploration in the search for oil and gas in terms of complex structures (Seismic-2010)", September 16—22, 2010, Kurortnoye, Crimea, Ukraine. P. 17—26 (in Russian).

Kutas R. I., 1978. Thermal flux field and the theoretical model of the earth's crust. Kiev: Naukova Dumka, 140 p. (in Russian).

Lebedev T. S., Korniets D. V., Shapoval V. I., Korchin V. A., 1972. Elastic properties of rocks at high pressures. Kiev: Naukova Dumka, 183 p. (in Russian).

Lebedev T. S., Korchin V. A., Shapoval V. I., Pravdivyy A. A., 1972. Geofizicheskiy zhurnal 11(5), 33—39 (in Russian).

Lebedev T. S., Korchin V. A., Savenko B. Ya., Shapoval V. I., Shepel S. I., 1986. Physical properties of minerals in thermobaric conditions of the lithosphere. Kiev: Naukova Dumka, 198 p. (in Russian).

Lebedev T. S., Korchin V. A., Savenko B. Ya., Shapoval V. I., Shepel S. I., Burtnyy P. A., 1988. Petrophysical studies at high PT parameters and geophysical applications. Kiev: Naukova Dumka, 250 p. (in Russian).

Milanovskiy S. Yu., Nikolaevskiy V. N., 2010. Transport Processes (migration) in the cracks of the crust. International scientific-practical conference "Modern methods of seismic exploration in the search for oil and gas in terms of complex structures (Seismic-2010)", September 16—22, 2010, Kurortnoye, Crimea, Ukraine. P. 37—44 (in Russian).

Milanovskiy S. Yu., Nikolaevskiy V. N., 2009. The role of the fracture in the evolution of the earth's crust. In: Tectonophysics and topical issues of the Earth Sciences. Proceedings of the All-Russian Conference. Vol. 2. Moscow: IPE RAS Publ., P. 71—103 (in Russian).

Nashchekin V. V., 1969. Technical thermodynamics and heat transfer. Moscow: Vysshaya shkola, 560 p. (in Russian).

Nikolaevskiy V. N., 1996. Geomechanics and fluid dynamics. Moscow: Nedra, 447 p. (in Russian).

Pavlenkova N. I., 1973. Wave field and model of the crust. Kiev: Naukova Dumka, 219 p. (in Russian).

Pavlenkova N. I., 2006. Fluid regime of the upper layers of the Earth by geophysical data. In: Fluids and hydrodynamics. Moscow: Nauka, P. 201—218 (in Russian).

Rader E., 1987. Fluid inclusions in minerals. In 2 vol. Moscow: Mir, 632 p. (in Russian).

Rusakov O. M., Kutas R. I., 2014. Fata Morgana doctrine of biogenic hydrocarbons in the sea Chorny. Geofizicheskiy zhurnal 36(2), 3—17 (in Russian).

Tripolskiy A. A., Sharov N. V., 2004. Lithosphere of Precambrian shields of the northern hemisphere of the earth from seismic data. Petrozavodsk: KRC RAS Publ., 159 p. (in Russian).

Korchin V. A., 2006. Thermobaric Seismic Stratification of the Lithosphere. 12 International Symposium on Deep Structure of the Continents and their Margins. September 24—29, 2006, Shonan Village Centre, Hayama, Japan, NHA-P02. CD-ROM.

Korchin V., 2010. Low velocity zones in the Earth’s crust. Geofizicheskiy zhurnal 32(4), 70.

Korchin V. A., Burtny P. A., Karnaukhova E. E., 2006. Thermobaric Petrostructural Modelling of the Earth’s Crust and the Nature of some Seismic Boundaries. 12 International Symposium on Deep Structure of the Continents and their Margins, September 24—29, 2006. Shonan Village Centre, Hayama, Japan, IMC-P05.

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Опубліковано

2015-10-01

Як цитувати

Korchin, V. (2015). Low velocity zones of thermobaric origin in the crystalline crust. Геофізичний журнал, 37(5), 46–65. https://doi.org/10.24028/gzh.0203-3100.v37i5.2015.111145

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