Lyell Collection
Geological Society, London, Special Publications
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Perroud, H.
Right arrow Articles by Rebelle, M.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Geological Society, London, Special Publications; 1995; v. 98; p. 33-41;
DOI: 10.1144/GSL.SP.1995.098.01.03
© 1995 Geological Society of London

Palaeomagnetic Properties of Hydrocarbon Reservoirs

Hydrocarbon seepage dating through chemical remagnetization

Hervé Perroud1, Annick Chauvin2 & Michel Rebelle3

1 Laboratorie de géophysique, Université de Pau, 64000 Pau, France
2 Laboratorie de paléomagnétisme, Université de Rennes, 35000 Rennes, France
3 Elf Aquitaine Production, Division Etudes et Synthèses, Tour Elf, 92078 Paris La Défense, France

A magnetostratigraphic study of Permian red sandstones from the Van Dyck well, offshore the Netherlands, revealed an anomalous magnetization, with normal polarity and a high inclination (+47°), interpreted as a Jurassic chemical remagnetization. An extensive investigation of the magnetic mineralogy indicated that, in addition to the main carrier (hematite), minor magnetic phases were present (magnetite, maghemite or pyrrhotite). This last phase is unstable with temperature and has a Curie point of 350°C. As an interpretation, late hematite precipitation (200–150 Ma ago) is proposed, following an initial dissolution of the original hematite and precipitation of magnetite and/or other low coercivity minerals, possibly in association with seepage of reducing fluids such as hydrocarbons. This model allows the proposition of a Jurassic age for the end of the hydrocarbon migration, giving new constraints to the origin of the fossil products in this basin.





This article has been cited by other articles:


Home page
 Geological Society, London, Special PublicationsHome page
J. Parnell
Introduction: Approaches to dating and duration of fluid flow and fluid-rock interaction
Geological Society, London, Special Publications, 1998; 144: 1 - 8.
[Abstract] [PDF]