The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin
The origin of hydrogen–hydrocarbon gases present in the rocks of the Khibiny massif in unusually high concentrations has been the subject of many years of discussion. To assess the role of potential mechanisms and relative time of formation of gases occluded in inclusions in minerals, the molecular...
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ftdoajarticles:oai:doaj.org/article:614ec913d3ed42f395e62e925e554ae9 2023-05-15T17:05:02+02:00 The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin Valentin A. Nivin Vyacheslav V. Pukha Olga D. Mokrushina Julia A. Mikhailova 2022-11-01T00:00:00Z https://doi.org/10.3390/geosciences12110416 https://doaj.org/article/614ec913d3ed42f395e62e925e554ae9 EN eng MDPI AG https://www.mdpi.com/2076-3263/12/11/416 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences12110416 2076-3263 https://doaj.org/article/614ec913d3ed42f395e62e925e554ae9 Geosciences, Vol 12, Iss 416, p 416 (2022) abiogenic hydrocarbon gases occluded gases molecular weight distribution hydrogen nepheline syenites foidolites Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.3390/geosciences12110416 2022-12-30T19:41:26Z The origin of hydrogen–hydrocarbon gases present in the rocks of the Khibiny massif in unusually high concentrations has been the subject of many years of discussion. To assess the role of potential mechanisms and relative time of formation of gases occluded in inclusions in minerals, the molecular weight distribution of C 1 –C 5 alkanes in the main rock types of the Khibiny massif was studied. For this purpose, the occluded gases were extracted from rocks by mechanical grinding and their composition was analyzed on a gas chromatograph. It is established that the molecular weight distribution of occluded hydrocarbon gases in the Khibiny massif corresponds to the classical Anderson–Schulz–Flory distribution. In addition, the slopes of the linear relationships are relatively steep. This indicates a predominantly abiogenic origin of the occluded gases of the Khibiny massif. At the same time, a small proportion of biogenic hydrocarbons is present and is associated with the influence of meteoric waters. It was also found that in the Khibiny massif, the proportion of relatively high-temperature gases decreases towards the Main foidolite Ring in the following sequence: foyaite and khibinite–trachytoid khibinite–rischorrite and lyavochorrite–foidolites and apatite–nepheline ores. In the same sequence, an increase in the proportion of heavy hydrocarbons and the increasing role of oxidation and condensation reactions in the transformation of hydrocarbons occurs. Article in Journal/Newspaper kola peninsula Directory of Open Access Journals: DOAJ Articles Kola Peninsula Khibiny ENVELOPE(33.210,33.210,67.679,67.679) Geosciences 12 11 416 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
abiogenic hydrocarbon gases occluded gases molecular weight distribution hydrogen nepheline syenites foidolites Geology QE1-996.5 |
spellingShingle |
abiogenic hydrocarbon gases occluded gases molecular weight distribution hydrogen nepheline syenites foidolites Geology QE1-996.5 Valentin A. Nivin Vyacheslav V. Pukha Olga D. Mokrushina Julia A. Mikhailova The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin |
topic_facet |
abiogenic hydrocarbon gases occluded gases molecular weight distribution hydrogen nepheline syenites foidolites Geology QE1-996.5 |
description |
The origin of hydrogen–hydrocarbon gases present in the rocks of the Khibiny massif in unusually high concentrations has been the subject of many years of discussion. To assess the role of potential mechanisms and relative time of formation of gases occluded in inclusions in minerals, the molecular weight distribution of C 1 –C 5 alkanes in the main rock types of the Khibiny massif was studied. For this purpose, the occluded gases were extracted from rocks by mechanical grinding and their composition was analyzed on a gas chromatograph. It is established that the molecular weight distribution of occluded hydrocarbon gases in the Khibiny massif corresponds to the classical Anderson–Schulz–Flory distribution. In addition, the slopes of the linear relationships are relatively steep. This indicates a predominantly abiogenic origin of the occluded gases of the Khibiny massif. At the same time, a small proportion of biogenic hydrocarbons is present and is associated with the influence of meteoric waters. It was also found that in the Khibiny massif, the proportion of relatively high-temperature gases decreases towards the Main foidolite Ring in the following sequence: foyaite and khibinite–trachytoid khibinite–rischorrite and lyavochorrite–foidolites and apatite–nepheline ores. In the same sequence, an increase in the proportion of heavy hydrocarbons and the increasing role of oxidation and condensation reactions in the transformation of hydrocarbons occurs. |
format |
Article in Journal/Newspaper |
author |
Valentin A. Nivin Vyacheslav V. Pukha Olga D. Mokrushina Julia A. Mikhailova |
author_facet |
Valentin A. Nivin Vyacheslav V. Pukha Olga D. Mokrushina Julia A. Mikhailova |
author_sort |
Valentin A. Nivin |
title |
The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin |
title_short |
The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin |
title_full |
The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin |
title_fullStr |
The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin |
title_full_unstemmed |
The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin |
title_sort |
molecular weight distribution of occluded hydrocarbon gases in the khibiny nepheline–syenite massif (kola peninsula, nw russia) in relation to the problem of their origin |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/geosciences12110416 https://doaj.org/article/614ec913d3ed42f395e62e925e554ae9 |
long_lat |
ENVELOPE(33.210,33.210,67.679,67.679) |
geographic |
Kola Peninsula Khibiny |
geographic_facet |
Kola Peninsula Khibiny |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_source |
Geosciences, Vol 12, Iss 416, p 416 (2022) |
op_relation |
https://www.mdpi.com/2076-3263/12/11/416 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences12110416 2076-3263 https://doaj.org/article/614ec913d3ed42f395e62e925e554ae9 |
op_doi |
https://doi.org/10.3390/geosciences12110416 |
container_title |
Geosciences |
container_volume |
12 |
container_issue |
11 |
container_start_page |
416 |
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1766059409055678464 |