Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
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 ISI Web of Science (7)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Jonk, R.
Right arrow Articles by Fallick, A.E.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 2003; v. 160; issue.6; p. 881-894;
DOI: 10.1144/0016-764902-091
© 2003 Geological Society of London

Original Article

The structural and diagenetic evolution of injected sandstones: examples from the Kimmeridgian of NE Scotland

R. Jonk1, D. Duranti1, J. Parnell1, A. Hurst1 & A.E. Fallick2

1 1Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen AB24 3UE, UK (e-mail: r.jonk@abdn.ac.uk)
2 2Scottish Universities Environmental Research Centre, East Kilbride, Glasgow G75 0QF, UK

Injected sandstones occurring in the Kimmeridgian of NE Scotland along the bounding Great Glen and Helmsdale faults formed when basinal fluids moved upward along the fault zones, fluidizing Oxfordian sands encountered at shallow depth and injecting them into overlying Kimmeridgian strata. The orientation of dykes, in addition to coeval faults and fractures, was controlled by a stress state related to dextral strike-slip along the bounding fault zones. Diagenetic studies of cements allow the reconstruction of the fluid flow history. The origin of deformation bands in sandstone dykes and sills was related to the contraction of the host-rocks against dyke and sill walls following the initial stage of fluidized flow, and these deformation bands are the earliest diagenetic imprint. Early non-ferroan calcite precipitated in injection structures at temperatures between 70 and 100 °C, indicating that it precipitated from relatively hot basinal fluids that drove injection. Coeval calcite-filled fractures show similar temperatures, suggesting that relatively hot fluids were responsible for calcite precipitation in any permeable pathway created by dextral simple shear along the faults. During progressive burial, percolating sea water was responsible for completely cementing the still relatively porous injected sandstones with a second generation of ferroan calcite, which contains fluid inclusions with homogenization temperatures below 50 °C. During this phase, depositional host sandstones were also cemented.

Key Words: Kimmeridgian • sandstone dykes • carbonates • cements • deformation




This article has been cited by other articles:


Home page
 Geological Society, London, Special PublicationsHome page
A. Hurst, J. A. Cartwright, M. Huuse, and D. Duranti
Extrusive sandstones (extrudites): a new class of stratigraphic trap?
Geological Society, London, Special Publications, 2006; 254: 289 - 300.
[Abstract] [PDF]

Home page
 AAPG BulletinHome page
R. Jonk, A. Hurst, D. Duranti, J. Parnell, A. Mazzini, and A. E. Fallick
Origin and timing of sand injection, petroleum migration, and diagenesis in Tertiary reservoirs, south Viking Graben, North Sea
AAPG Bulletin, 2005; 89: 329 - 357.
[Abstract] [Full Text] [PDF]