A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland)
International audience Identifying independent parameters to bracket the oil window in sedimentary basins is of first importance for petroleum exploration. We investigate the magnetic assemblage of Cretaceous claystones collected from the western volcanic margin of Greenland. These claystones experi...
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ftunivorleans:oai:HAL:insu-00687471v1 2024-09-15T17:57:00+00:00 A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland) Mansour Abdelmalak, Mohamed Aubourg, Charles Geoffroy, Laurent Laggoun-Défarge, Fatima Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR) TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) 2012 https://insu.hal.science/insu-00687471 https://doi.org/10.1306/07121111008 en eng HAL CCSD American Association of Petroleum Geologists info:eu-repo/semantics/altIdentifier/doi/10.1306/07121111008 insu-00687471 https://insu.hal.science/insu-00687471 doi:10.1306/07121111008 ISSN: 0149-1423 AAPG Bulletin https://insu.hal.science/insu-00687471 AAPG Bulletin, 2012, 96 (2), pp.205-215. ⟨10.1306/07121111008⟩ [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2012 ftunivorleans https://doi.org/10.1306/07121111008 2024-06-24T23:55:01Z International audience Identifying independent parameters to bracket the oil window in sedimentary basins is of first importance for petroleum exploration. We investigate the magnetic assemblage of Cretaceous claystones collected from the western volcanic margin of Greenland. These claystones experienced low-grade burial (<5 km). To assess the maturity of organic matter, we measured the vitrinite reflectance (Ro) and the temperature at maximum release of hydrocarbons (Tmax) that occurs during Rock-Eval pyrolysis. These data (0.37% ≤ Ro ≤ 2%, 422°C ≤ Tmax ≤ 604°C) show that most claystones are immature to mature with respect to the oil window. We suggest that magnetic minerals can be an indication of burial temperature. The magnetic assemblage of the same samples is elucidated by lowtemperature (<300 K) and high-temperature (>300 K) properties of isothermal remanent magnetization. The magnetic assemblage of immature claystones (lower Ro) resides in goethite, greigite, and some magnetite. The magnetic assemblage of immature to early mature claystones (higher Ro) resides in stoichiometric magnetite and fine-grained pyrrhotite. By comparing these results with those from claystones from the Paris Basin (France) and the Jura Mountains (Switzerland), we suggest the existence of similar mechanisms for the formation of magnetic minerals during burial. If confirmed by further studies, the magnetic assemblage of claystones may be diagnostic of oil windows. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Greenland Université d'Orléans: HAL AAPG Bulletin 96 2 205 215 |
institution |
Open Polar |
collection |
Université d'Orléans: HAL |
op_collection_id |
ftunivorleans |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes Mansour Abdelmalak, Mohamed Aubourg, Charles Geoffroy, Laurent Laggoun-Défarge, Fatima A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland) |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Identifying independent parameters to bracket the oil window in sedimentary basins is of first importance for petroleum exploration. We investigate the magnetic assemblage of Cretaceous claystones collected from the western volcanic margin of Greenland. These claystones experienced low-grade burial (<5 km). To assess the maturity of organic matter, we measured the vitrinite reflectance (Ro) and the temperature at maximum release of hydrocarbons (Tmax) that occurs during Rock-Eval pyrolysis. These data (0.37% ≤ Ro ≤ 2%, 422°C ≤ Tmax ≤ 604°C) show that most claystones are immature to mature with respect to the oil window. We suggest that magnetic minerals can be an indication of burial temperature. The magnetic assemblage of the same samples is elucidated by lowtemperature (<300 K) and high-temperature (>300 K) properties of isothermal remanent magnetization. The magnetic assemblage of immature claystones (lower Ro) resides in goethite, greigite, and some magnetite. The magnetic assemblage of immature to early mature claystones (higher Ro) resides in stoichiometric magnetite and fine-grained pyrrhotite. By comparing these results with those from claystones from the Paris Basin (France) and the Jura Mountains (Switzerland), we suggest the existence of similar mechanisms for the formation of magnetic minerals during burial. If confirmed by further studies, the magnetic assemblage of claystones may be diagnostic of oil windows. |
author2 |
Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR) TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Mansour Abdelmalak, Mohamed Aubourg, Charles Geoffroy, Laurent Laggoun-Défarge, Fatima |
author_facet |
Mansour Abdelmalak, Mohamed Aubourg, Charles Geoffroy, Laurent Laggoun-Défarge, Fatima |
author_sort |
Mansour Abdelmalak, Mohamed |
title |
A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland) |
title_short |
A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland) |
title_full |
A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland) |
title_fullStr |
A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland) |
title_full_unstemmed |
A new oil-window indicator? The magnetic assemblage of claystones from the Baffin Bay volcanic margin (Greenland) |
title_sort |
new oil-window indicator? the magnetic assemblage of claystones from the baffin bay volcanic margin (greenland) |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://insu.hal.science/insu-00687471 https://doi.org/10.1306/07121111008 |
genre |
Baffin Bay Baffin Bay Baffin Greenland |
genre_facet |
Baffin Bay Baffin Bay Baffin Greenland |
op_source |
ISSN: 0149-1423 AAPG Bulletin https://insu.hal.science/insu-00687471 AAPG Bulletin, 2012, 96 (2), pp.205-215. ⟨10.1306/07121111008⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1306/07121111008 insu-00687471 https://insu.hal.science/insu-00687471 doi:10.1306/07121111008 |
op_doi |
https://doi.org/10.1306/07121111008 |
container_title |
AAPG Bulletin |
container_volume |
96 |
container_issue |
2 |
container_start_page |
205 |
op_container_end_page |
215 |
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1810433195625152512 |