Carbon depth cycle and formation of abiogenic hydrocarbons
The relevance. Identification of mechanisms of carbon metamorphic transformation in convergent and divergent regions of the Earth, assessment of the scale of deep transport and the transfer on the generation of abiogenic hydrocarbons in tectonic discharge zones are some of the most urgent problems o...
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Format: | Article |
Language: | Russian |
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Tomsk Polytechnic University
2018-08-01
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Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
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Online Access: | http://izvestiya.tpu.ru/archive/article/view/2083 |
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author | Nickolay O. Sorokhtin Leopold I. Lobkovsky Igor Petrovich Semiletov |
author_facet | Nickolay O. Sorokhtin Leopold I. Lobkovsky Igor Petrovich Semiletov |
author_sort | Nickolay O. Sorokhtin |
collection | DOAJ |
description | The relevance. Identification of mechanisms of carbon metamorphic transformation in convergent and divergent regions of the Earth, assessment of the scale of deep transport and the transfer on the generation of abiogenic hydrocarbons in tectonic discharge zones are some of the most urgent problems of modern geology. The aim of the research is to describe multi-stage and polycyclic carbon transformation and transfer in the crust and mantle. Sedimentary rocks covered in subductions zones are destroyed and transformed by metamorphic processes. Some of the newly formed carbon compounds are transferred by convective flows of the mantle to the rift zones of mid-ocean ridges, brought to the surface, decomposed in the presence of water and form a wide range of hydrocarbons and carbon dioxide. There, they are again deposited on the sea floor in the form of sediments forming carbonate and carbon/containing structural/material complexes. Result. It is determined that the manifestation of a multi-stage mechanism of physicochemical transformations in crust-mantle areas of the Earth leads to occurrence of features of abiogenic origin in biogenic hydrocarbons. The identified crust-mantle carbon cycle is a part of a global process of carbon cyclic transport from the atmosphere into the mantle and back. The scale of its manifestation, most likely, is not so large. Numerous small (mm and fractions of mm) particles of exogenous matter and dispersed carbon pulled in plate subduction zones form a stable geochemical train of the crustal trend in the mantle spreading along the surface of convection flows motion. It is possible to judge indirectly the scale of this process manifestation by degassing amount of hydrocarbon and carbon dioxide gases and hydrogen in Earth's crust rift systems. In this case the amount of generated depth/origin hydrocarbon gases cannot form large gas and oil and gas fields as their significant part is released in the atmosphere. Only a small amount of compounds may be deposited in oceanic sediments and form gas hydrate accumulations in them. |
first_indexed | 2024-03-13T07:49:07Z |
format | Article |
id | doaj.art-81227143e8b84d0aa207d851cfac8682 |
institution | Directory Open Access Journal |
issn | 2500-1019 2413-1830 |
language | Russian |
last_indexed | 2024-03-13T07:49:07Z |
publishDate | 2018-08-01 |
publisher | Tomsk Polytechnic University |
record_format | Article |
series | Известия Томского политехнического университета: Инжиниринг георесурсов |
spelling | doaj.art-81227143e8b84d0aa207d851cfac86822023-06-02T21:10:07ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302018-08-013298Carbon depth cycle and formation of abiogenic hydrocarbonsNickolay O. SorokhtinLeopold I. LobkovskyIgor Petrovich SemiletovThe relevance. Identification of mechanisms of carbon metamorphic transformation in convergent and divergent regions of the Earth, assessment of the scale of deep transport and the transfer on the generation of abiogenic hydrocarbons in tectonic discharge zones are some of the most urgent problems of modern geology. The aim of the research is to describe multi-stage and polycyclic carbon transformation and transfer in the crust and mantle. Sedimentary rocks covered in subductions zones are destroyed and transformed by metamorphic processes. Some of the newly formed carbon compounds are transferred by convective flows of the mantle to the rift zones of mid-ocean ridges, brought to the surface, decomposed in the presence of water and form a wide range of hydrocarbons and carbon dioxide. There, they are again deposited on the sea floor in the form of sediments forming carbonate and carbon/containing structural/material complexes. Result. It is determined that the manifestation of a multi-stage mechanism of physicochemical transformations in crust-mantle areas of the Earth leads to occurrence of features of abiogenic origin in biogenic hydrocarbons. The identified crust-mantle carbon cycle is a part of a global process of carbon cyclic transport from the atmosphere into the mantle and back. The scale of its manifestation, most likely, is not so large. Numerous small (mm and fractions of mm) particles of exogenous matter and dispersed carbon pulled in plate subduction zones form a stable geochemical train of the crustal trend in the mantle spreading along the surface of convection flows motion. It is possible to judge indirectly the scale of this process manifestation by degassing amount of hydrocarbon and carbon dioxide gases and hydrogen in Earth's crust rift systems. In this case the amount of generated depth/origin hydrocarbon gases cannot form large gas and oil and gas fields as their significant part is released in the atmosphere. Only a small amount of compounds may be deposited in oceanic sediments and form gas hydrate accumulations in them.http://izvestiya.tpu.ru/archive/article/view/2083carbon cyclesubduction zonesrift zonesabiogenic hydrocarbonscrust-mantle transportcarbon geochemistry |
spellingShingle | Nickolay O. Sorokhtin Leopold I. Lobkovsky Igor Petrovich Semiletov Carbon depth cycle and formation of abiogenic hydrocarbons Известия Томского политехнического университета: Инжиниринг георесурсов carbon cycle subduction zones rift zones abiogenic hydrocarbons crust-mantle transport carbon geochemistry |
title | Carbon depth cycle and formation of abiogenic hydrocarbons |
title_full | Carbon depth cycle and formation of abiogenic hydrocarbons |
title_fullStr | Carbon depth cycle and formation of abiogenic hydrocarbons |
title_full_unstemmed | Carbon depth cycle and formation of abiogenic hydrocarbons |
title_short | Carbon depth cycle and formation of abiogenic hydrocarbons |
title_sort | carbon depth cycle and formation of abiogenic hydrocarbons |
topic | carbon cycle subduction zones rift zones abiogenic hydrocarbons crust-mantle transport carbon geochemistry |
url | http://izvestiya.tpu.ru/archive/article/view/2083 |
work_keys_str_mv | AT nickolayosorokhtin carbondepthcycleandformationofabiogenichydrocarbons AT leopoldilobkovsky carbondepthcycleandformationofabiogenichydrocarbons AT igorpetrovichsemiletov carbondepthcycleandformationofabiogenichydrocarbons |