Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons
The processes of multi-stage and polycyclic transformation and transfer of carbon in the crust and mantle have been described. The sediments drawn in the plate underthrust zones break down, become transformed and altered by metamorphic events, and part of the newly formed carbon compounds is transferred by the mantle convective currents to rift zones of the mid-oceanic ridges and carried up to the surface as hydrocarbons of various composition and carbon dioxide. This material becomes re-deposited on the sea floor as sediments forming carbonaceous and carbon-bearing units. As a result of multi-stage mechanism of physical and chemical transformations in the crust-mantle areas of the Earth hydrocarbon compounds acquire features of abiogenic origin remaining, in fact, exogenic. The revealed crust-mantle carbon cycle represents part of a global process for the cyclic carbon transfer from the atmosphere to the mantle and back. The scale of its manifestation is likely not so wide, and numerous small (mm and portions of millimeters) particles of exogenic substance and dispersed carbon drawn in the plate underthrust zones form a stable geochemical tail of the crustal direction in the mantle propagating in the plane of convective currents motion. The scale of this process may be indirectly suggested by the volumes of hydrocarbon and carbon dioxide de-gassing and hydrogen in the rift systems of the Earth crust. The amount of generated hydrocarbon gases with deep-seated origin cannot form large gas and oil-and-gas fields since their significant part is transferred to the atmosphere. Just some portion of compounds may be deposited in oceanic sediments and generate gas-hydrate pools.
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Format: | Journal Contribution biblioteca |
Language: | English |
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2018
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Subjects: | Abiogenic hydrocarbons, Crust-mantle transfer, Абиогенные углеводороды, Коромантийный перенос, ASFA_2015::G::Geology, ASFA_2015::G::Geophysics, ASFA_2015::G::Geochemistry, ASFA_2015::C::Carbon cycle, ASFA_2015::S::Subduction zones, ASFA_2015::R::Rift zones, |
Online Access: | http://hdl.handle.net/1834/41548 |
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Abiogenic hydrocarbons Crust-mantle transfer Абиогенные углеводороды Коромантийный перенос ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::G::Geochemistry ASFA_2015::C::Carbon cycle ASFA_2015::S::Subduction zones ASFA_2015::R::Rift zones Abiogenic hydrocarbons Crust-mantle transfer Абиогенные углеводороды Коромантийный перенос ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::G::Geochemistry ASFA_2015::C::Carbon cycle ASFA_2015::S::Subduction zones ASFA_2015::R::Rift zones |
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Abiogenic hydrocarbons Crust-mantle transfer Абиогенные углеводороды Коромантийный перенос ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::G::Geochemistry ASFA_2015::C::Carbon cycle ASFA_2015::S::Subduction zones ASFA_2015::R::Rift zones Abiogenic hydrocarbons Crust-mantle transfer Абиогенные углеводороды Коромантийный перенос ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::G::Geochemistry ASFA_2015::C::Carbon cycle ASFA_2015::S::Subduction zones ASFA_2015::R::Rift zones Sorokhtin, N. O. Nikiforov, S. L. Kozlov, N. Ye. Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons |
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The processes of multi-stage and polycyclic transformation and transfer of carbon in the crust and mantle have been described. The sediments drawn in the plate underthrust zones break down, become transformed and altered by metamorphic events, and part of the newly formed carbon compounds is transferred by the mantle convective currents to rift zones of the mid-oceanic ridges and carried up to the surface as hydrocarbons of various composition and carbon dioxide. This material becomes re-deposited on the sea floor as sediments forming carbonaceous and carbon-bearing units. As a result of multi-stage mechanism of physical and chemical transformations in the crust-mantle areas of the Earth hydrocarbon compounds acquire features of abiogenic origin remaining, in fact, exogenic. The revealed crust-mantle carbon cycle represents part of a global process for the cyclic carbon transfer from the atmosphere to the mantle and back. The scale of its manifestation is likely not so wide, and numerous small (mm and portions of millimeters) particles of exogenic substance and dispersed carbon drawn in the plate underthrust zones form a stable geochemical tail of the crustal direction in the mantle propagating in the plane of convective currents motion. The scale of this process may be indirectly suggested by the volumes of hydrocarbon and carbon dioxide de-gassing and hydrogen in the rift systems of the Earth crust. The amount of generated hydrocarbon gases with deep-seated origin cannot form large gas and oil-and-gas fields since their significant part is transferred to the atmosphere. Just some portion of compounds may be deposited in oceanic sediments and generate gas-hydrate pools. |
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Journal Contribution |
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Abiogenic hydrocarbons Crust-mantle transfer Абиогенные углеводороды Коромантийный перенос ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::G::Geochemistry ASFA_2015::C::Carbon cycle ASFA_2015::S::Subduction zones ASFA_2015::R::Rift zones |
author |
Sorokhtin, N. O. Nikiforov, S. L. Kozlov, N. Ye. |
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Sorokhtin, N. O. Nikiforov, S. L. Kozlov, N. Ye. |
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Sorokhtin, N. O. |
title |
Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons |
title_short |
Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons |
title_full |
Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons |
title_fullStr |
Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons |
title_full_unstemmed |
Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons |
title_sort |
crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons |
publishDate |
2018 |
url |
http://hdl.handle.net/1834/41548 |
work_keys_str_mv |
AT sorokhtinno crustmantlebranchoftheglobalcarboncycleandoriginofdeepseatedhydrocarbons AT nikiforovsl crustmantlebranchoftheglobalcarboncycleandoriginofdeepseatedhydrocarbons AT kozlovnye crustmantlebranchoftheglobalcarboncycleandoriginofdeepseatedhydrocarbons AT sorokhtinno koromantijnaâvetvʹglobalʹnogociklauglerodaiproishoždenieglubinnyhuglevodorodov AT nikiforovsl koromantijnaâvetvʹglobalʹnogociklauglerodaiproishoždenieglubinnyhuglevodorodov AT kozlovnye koromantijnaâvetvʹglobalʹnogociklauglerodaiproishoždenieglubinnyhuglevodorodov |
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1756080176531243008 |
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dig-aquadocs-1834-415482021-10-27T02:02:24Z Crust-mantle branch of the global carbon cycle and origin of deep-seated hydrocarbons Коромантийная ветвь глобального цикла углерода и происхождение глубинных углеводородов Sorokhtin, N. O. Nikiforov, S. L. Kozlov, N. Ye. Abiogenic hydrocarbons Crust-mantle transfer Абиогенные углеводороды Коромантийный перенос ASFA_2015::G::Geology ASFA_2015::G::Geophysics ASFA_2015::G::Geochemistry ASFA_2015::C::Carbon cycle ASFA_2015::S::Subduction zones ASFA_2015::R::Rift zones The processes of multi-stage and polycyclic transformation and transfer of carbon in the crust and mantle have been described. The sediments drawn in the plate underthrust zones break down, become transformed and altered by metamorphic events, and part of the newly formed carbon compounds is transferred by the mantle convective currents to rift zones of the mid-oceanic ridges and carried up to the surface as hydrocarbons of various composition and carbon dioxide. This material becomes re-deposited on the sea floor as sediments forming carbonaceous and carbon-bearing units. As a result of multi-stage mechanism of physical and chemical transformations in the crust-mantle areas of the Earth hydrocarbon compounds acquire features of abiogenic origin remaining, in fact, exogenic. The revealed crust-mantle carbon cycle represents part of a global process for the cyclic carbon transfer from the atmosphere to the mantle and back. The scale of its manifestation is likely not so wide, and numerous small (mm and portions of millimeters) particles of exogenic substance and dispersed carbon drawn in the plate underthrust zones form a stable geochemical tail of the crustal direction in the mantle propagating in the plane of convective currents motion. The scale of this process may be indirectly suggested by the volumes of hydrocarbon and carbon dioxide de-gassing and hydrogen in the rift systems of the Earth crust. The amount of generated hydrocarbon gases with deep-seated origin cannot form large gas and oil-and-gas fields since their significant part is transferred to the atmosphere. Just some portion of compounds may be deposited in oceanic sediments and generate gas-hydrate pools. Описаны процессы многостадийного и полициклического преобразования и переноса углерода в коре и мантии. Затянутые в зонах поддвига плит осадки разрушаются, трансформируются и преобразуются метаморфическими процессами, а часть вновь сформированных углеродистых соединений переносится конвективными течениями мантии в рифтовые зоны срединно-океанических хребтов и выносится на поверхность в виде углеводородов различного состава и углекислого газа. Далее они снова отлагаются на морском дне в виде осадков, образуя карбонатные и углеродсодержащие структурно-вещественные комплексы. В результате проявления многоступенчатого механизма физико-химических преобразований в коромантийных областях Земли углеводородные соединения приобретают черты абиогенного происхождения, по сути оставаясь экзогенными. Выявленный коромантийный цикл углерода является частью глобального процесса циклического переноса углерода из атмосферы в мантию и обратно. Масштабы его проявления, скорее всего, не столь широки, а многочисленные мелкие (мм и доли мм) частицы экзогенного вещества и рассеянного углерода, затянутые в зоны поддвига плит, образуют устойчивый геохимический шлейф коровой направленности в мантии, распространяющийся в плоскости перемещения конвективных потоков. Косвенно о масштабе проявления данного процесса можно судить по объемам дегазации углеводородных и углекислого газов, а также водорода в рифтовых системах земной коры. При этом количество генерируемых углеводородных газов глубинного происхождения не может формировать крупных газовых и нефтегазовых месторождений, так как значительная их часть переносится в атмосферу. Лишь некоторое количество соединений способно отлагаться в океанических осадках и формировать в них залежи газогидратов. Published Refereed 2021-10-26T06:24:42Z 2021-10-26T06:24:42Z 2018 Journal Contribution http://hdl.handle.net/1834/41548 en http://vestnik.mstu.edu.ru/show-eng.shtml?art=1929 http://vestnik.mstu.edu.ru/show.shtml?art=1929 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ pp.61-79 |