Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities
Cross-section of rocks distribution with depth along the central part of DSS geo-traverse IV, which crosses several zones of low seismic velocities (ZLV) has been plotted using the method of petro-physical thermobaric simulation. Deep horizons of the Earth’s crust within this part of the profile (up...
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| Дата: | 2011 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | rus |
| Опубліковано: |
Subbotin Institute of Geophysics of the NAS of Ukraine
2011
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| Онлайн доступ: | https://journals.uran.ua/geofizicheskiy/article/view/116795 |
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| Назва журналу: | Geofizicheskiy Zhurnal |
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journalsuranua-geofizicheskiy-article-1167952020-10-07T11:02:57Z Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities Korchin, V. A. Burtnyi, P. A. Cross-section of rocks distribution with depth along the central part of DSS geo-traverse IV, which crosses several zones of low seismic velocities (ZLV) has been plotted using the method of petro-physical thermobaric simulation. Deep horizons of the Earth’s crust within this part of the profile (up to 40 km) are formed by plagiogranites, diorites, enderbites. As a rule, ZLV found at the depth 5-15 km are not dependent from the mineral composition of rocks and are first of all determined by deep temperature regimes of the crust of this area of the USh. Zones of low velocities appear in those cases when temperature gradient at the corresponding depths exceeds some definite threshold and pressure is not able to compensate violation of integrity of mineral medium produced by the action of temperature. Temperature fluctuations at the depths 7-20 km may change parameters of zone of low velocities up to their disappearance. Relation of ZLW configuration (their intensity, extension along the depth, deflation of velocity) to heat flows (HF) measured in the studied area is observed. Intense ZLV correspond to higher HF, within the areas with low HF zones of low velocities are weak or absent. Subbotin Institute of Geophysics of the NAS of Ukraine 2011-12-01 Article Article application/pdf https://journals.uran.ua/geofizicheskiy/article/view/116795 10.24028/gzh.0203-3100.v33i6.2011.116795 Geofizicheskiy Zhurnal; Vol. 33 No. 6 (2011); 82-95 Геофизический журнал; Том 33 № 6 (2011); 82-95 Геофізичний журнал; Том 33 № 6 (2011); 82-95 2524-1052 0203-3100 rus https://journals.uran.ua/geofizicheskiy/article/view/116795/110854 Copyright (c) 2020 Geofizicheskiy Zhurnal https://creativecommons.org/licenses/by/4.0 |
| institution |
Geofizicheskiy Zhurnal |
| collection |
OJS |
| language |
rus |
| format |
Article |
| author |
Korchin, V. A. Burtnyi, P. A. |
| spellingShingle |
Korchin, V. A. Burtnyi, P. A. Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities |
| author_facet |
Korchin, V. A. Burtnyi, P. A. |
| author_sort |
Korchin, V. A. |
| title |
Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities |
| title_short |
Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities |
| title_full |
Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities |
| title_fullStr |
Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities |
| title_full_unstemmed |
Thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the Ukrainian shield with zones of low seismic velocities |
| title_sort |
thermobaric petrophysical modeling of the lithosphere of the parts of the earth's crust of the ukrainian shield with zones of low seismic velocities |
| description |
Cross-section of rocks distribution with depth along the central part of DSS geo-traverse IV, which crosses several zones of low seismic velocities (ZLV) has been plotted using the method of petro-physical thermobaric simulation. Deep horizons of the Earth’s crust within this part of the profile (up to 40 km) are formed by plagiogranites, diorites, enderbites. As a rule, ZLV found at the depth 5-15 km are not dependent from the mineral composition of rocks and are first of all determined by deep temperature regimes of the crust of this area of the USh. Zones of low velocities appear in those cases when temperature gradient at the corresponding depths exceeds some definite threshold and pressure is not able to compensate violation of integrity of mineral medium produced by the action of temperature. Temperature fluctuations at the depths 7-20 km may change parameters of zone of low velocities up to their disappearance. Relation of ZLW configuration (their intensity, extension along the depth, deflation of velocity) to heat flows (HF) measured in the studied area is observed. Intense ZLV correspond to higher HF, within the areas with low HF zones of low velocities are weak or absent. |
| publisher |
Subbotin Institute of Geophysics of the NAS of Ukraine |
| publishDate |
2011 |
| url |
https://journals.uran.ua/geofizicheskiy/article/view/116795 |
| work_keys_str_mv |
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| first_indexed |
2024-04-21T19:41:24Z |
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2024-04-21T19:41:24Z |
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