Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea
A late Carboniferous to early Permian carbonate and evaporite succession from the Finnmark Platform (southern Barents Sea) contains nodules of anhydrite partially to fully replaced by calcite spar and native sulfur genetically linked to hydrocarbon migration and/or oxidation, analogous to processes...
Published in: | Geology |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Geological Society of America
2022
|
Subjects: | |
Online Access: | https://authors.library.caltech.edu/118210/ https://resolver.caltech.edu/CaltechAUTHORS:20221202-906480600.6 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:118210 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:118210 2023-05-15T15:38:39+02:00 Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea Hodgskiss, Malcolm S.W. Thiagarajan, Nivedita Wang, Yue Rameil, Niels Brunstad, Harald Hammer, Erik Pedersen, Jon Halvard Kirsimäe, Kalle Mørk, Atle Lepland, Aivo 2022-11-01 https://authors.library.caltech.edu/118210/ https://resolver.caltech.edu/CaltechAUTHORS:20221202-906480600.6 unknown Geological Society of America Hodgskiss, Malcolm S.W. and Thiagarajan, Nivedita and Wang, Yue and Rameil, Niels and Brunstad, Harald and Hammer, Erik and Pedersen, Jon Halvard and Kirsimäe, Kalle and Mørk, Atle and Lepland, Aivo (2022) Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea. Geology, 50 (11). pp. 1234-1238. ISSN 0091-7613. doi:10.1130/g50244.1. https://resolver.caltech.edu/CaltechAUTHORS:20221202-906480600.6 <https://resolver.caltech.edu/CaltechAUTHORS:20221202-906480600.6> Article PeerReviewed 2022 ftcaltechauth https://doi.org/10.1130/g50244.1 2023-01-05T18:59:10Z A late Carboniferous to early Permian carbonate and evaporite succession from the Finnmark Platform (southern Barents Sea) contains nodules of anhydrite partially to fully replaced by calcite spar and native sulfur genetically linked to hydrocarbon migration and/or oxidation, analogous to processes observed in salt diapir caprocks in the Gulf of Mexico. In situ U-Pb dating of this calcite spar therefore has the potential to directly date hydrocarbon migration and provide further insight into the geochemical and temperature conditions during this event when coupled with traditional stable and clumped isotope ratios (δ¹³C, δ¹⁸O, and Δ₄₇). Results indicate calcite formed ca. 50–15 Ma, postdating host-rock deposition by 250–285 m.y. Strongly negative δ¹³C values in the calcite spar (mean = −15‰) are consistent with a major contribution of carbon from hydrocarbons, and Δ₄₇ paleothermometry indicates a mean precipitation temperature of 46 ± 11 °C. These geochemical results are consistent with the local burial history and suggest protracted hydrocarbon migration and/or oxidation and caprock formation spanning ~35 m.y. Article in Journal/Newspaper Barents Sea Finnmark Finnmark Caltech Authors (California Institute of Technology) Barents Sea Geology 50 11 1234 1238 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
description |
A late Carboniferous to early Permian carbonate and evaporite succession from the Finnmark Platform (southern Barents Sea) contains nodules of anhydrite partially to fully replaced by calcite spar and native sulfur genetically linked to hydrocarbon migration and/or oxidation, analogous to processes observed in salt diapir caprocks in the Gulf of Mexico. In situ U-Pb dating of this calcite spar therefore has the potential to directly date hydrocarbon migration and provide further insight into the geochemical and temperature conditions during this event when coupled with traditional stable and clumped isotope ratios (δ¹³C, δ¹⁸O, and Δ₄₇). Results indicate calcite formed ca. 50–15 Ma, postdating host-rock deposition by 250–285 m.y. Strongly negative δ¹³C values in the calcite spar (mean = −15‰) are consistent with a major contribution of carbon from hydrocarbons, and Δ₄₇ paleothermometry indicates a mean precipitation temperature of 46 ± 11 °C. These geochemical results are consistent with the local burial history and suggest protracted hydrocarbon migration and/or oxidation and caprock formation spanning ~35 m.y. |
format |
Article in Journal/Newspaper |
author |
Hodgskiss, Malcolm S.W. Thiagarajan, Nivedita Wang, Yue Rameil, Niels Brunstad, Harald Hammer, Erik Pedersen, Jon Halvard Kirsimäe, Kalle Mørk, Atle Lepland, Aivo |
spellingShingle |
Hodgskiss, Malcolm S.W. Thiagarajan, Nivedita Wang, Yue Rameil, Niels Brunstad, Harald Hammer, Erik Pedersen, Jon Halvard Kirsimäe, Kalle Mørk, Atle Lepland, Aivo Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea |
author_facet |
Hodgskiss, Malcolm S.W. Thiagarajan, Nivedita Wang, Yue Rameil, Niels Brunstad, Harald Hammer, Erik Pedersen, Jon Halvard Kirsimäe, Kalle Mørk, Atle Lepland, Aivo |
author_sort |
Hodgskiss, Malcolm S.W. |
title |
Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea |
title_short |
Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea |
title_full |
Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea |
title_fullStr |
Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea |
title_full_unstemmed |
Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea |
title_sort |
time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a carboniferous-permian carbonate-evaporite succession, finnmark platform, barents sea |
publisher |
Geological Society of America |
publishDate |
2022 |
url |
https://authors.library.caltech.edu/118210/ https://resolver.caltech.edu/CaltechAUTHORS:20221202-906480600.6 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Finnmark Finnmark |
genre_facet |
Barents Sea Finnmark Finnmark |
op_relation |
Hodgskiss, Malcolm S.W. and Thiagarajan, Nivedita and Wang, Yue and Rameil, Niels and Brunstad, Harald and Hammer, Erik and Pedersen, Jon Halvard and Kirsimäe, Kalle and Mørk, Atle and Lepland, Aivo (2022) Time constraints on hydrocarbon migration and caprock formation recorded by calcite spar in a Carboniferous-Permian carbonate-evaporite succession, Finnmark Platform, Barents Sea. Geology, 50 (11). pp. 1234-1238. ISSN 0091-7613. doi:10.1130/g50244.1. https://resolver.caltech.edu/CaltechAUTHORS:20221202-906480600.6 <https://resolver.caltech.edu/CaltechAUTHORS:20221202-906480600.6> |
op_doi |
https://doi.org/10.1130/g50244.1 |
container_title |
Geology |
container_volume |
50 |
container_issue |
11 |
container_start_page |
1234 |
op_container_end_page |
1238 |
_version_ |
1766369828974624768 |