Amb motiu del tancament d'estiu, la validació de documents es reprendrà a partir del 28 d'agost de 2026. Disculpeu les molèsties.
Con motivo del cierre de verano, la validación de documentos se reanudará a partir del 28 de agosto de 2026. Disculpad las molestias
Due to the summer closure, document validation will resume starting August 28, 2026. We apologize for any inconvenience.

Files

687147.pdf (1.43 MB)

Document type

Article

Version

Accepted version

Publication date

2018-01-01

All rights reserved

Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/131918

Activation of stylolites as conduits for overpressured fluid flow in dolomitized platform carbonates

Journal Title

Authors

Director/Tutor

Journal ISSN

Volume Title

Related resource

https://doi.org/10.1144/SP459.3

Abstract

This study investigates the Late Aptian-earliest Albian platform carbonates of the Benicàssim area (Maestrat Basin, Spain) in order to assess the relationship between bed-parallel stylolites and the flow of diagenetic fluids during dolomitization and subsequent hydrothermal alteration. Dolostones and burial dolomite and calcite cements were studied by a combination of field geology and standard petrographic and isotope analysis. Field data indicate that dolostones are closely associated with seismic-scale synsedimentary faults, preferentially replace grain-dominated facies and typically show wavy dolomitizing fronts that mostly correspond to bed-parallel stylolites. The dolostones are corroded and contain bed-parallel pores that are filled with hydrothermal saddle dolomite and blocky calcite cements. This late calcite cement frequently engulfs clasts of the host dolostones, suggesting that hydraulic brecciation likely associated with overpressured fluid occurred. Results indicate that stylolites play a key role in the distribution of dolostones and subsequent hydrothermal mineralization. During the replacement stage, stylolites acted as baffles for the dolomitzing fluids controlling lateral fluid flow and resulting in the stratabound dolostone distribution. During the post-dolomitization stage, stylolites became preferred pathways for overpressured hydrothermal corrosive and mineralizing fluids that likely came from the underlying basement, and increased bed-parallel stylolitic porosity and probably also permeability.

Subject

Geologia estructural, Dolomia, Roques calcàries

Subject (English)

Structural geology, Dolomite, Carbonate rocks

Citation

Collections

Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

Citation

MARTÍN, Juan Diego (Martín Martín), et al. Activation of stylolites as conduits for overpressured fluid flow in dolomitized platform carbonates. Geological Society. Special Publication. 2018. Vol. 459, num. 1, pags. 157-182. ISSN 0305-8719. [consulted: 17 of August of 2026]. Available at: https://hdl.handle.net/2445/131918

Export metadata

JSON - METS

Share record