Dolomías controladas por fracturas en carbonatos aptienses de la zona de Benicàssim (SE Cuenca del Maestrat): distribución y características petrográficas
The study of fault-controlled dolostones has increased during the last decade due to the existence of numerous equivalent hydrocarbon reservoirs around the world. This contribution presents a new case study of fault-controlled dolostones that constitutes an excellent outcrop analogue for partially d...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/225030 |
| Acceso en línea: | http://hdl.handle.net/10261/225030 |
| Access Level: | acceso abierto |
| Palabra clave: | Maestrat Aptian dolomite fault-controlled MVT Cuenca del Maestrat Aptiense dolomía fractura |
| Sumario: | The study of fault-controlled dolostones has increased during the last decade due to the existence of numerous equivalent hydrocarbon reservoirs around the world. This contribution presents a new case study of fault-controlled dolostones that constitutes an excellent outcrop analogue for partially dolomitized reservoirs. Field data indicate that the dolomitization of the Middle Aptian to Early Albian shallow marine carbonates in the Benicàssim area (SE Maestrat Basin) resulted in massive stratiform to sub-stratiform tabular bodies, up to 150-m-thick, that extend for several thousand square meters. Dolostones bodies occur in close association with basement faults and appear intercalated between very low porosity mud-dominated facies and/or early cemented grain-dominated facies. Petrographic analyses indicate that the dolostone registers the typical burial paragenesis characterized by the host limestone replacement, dolomite cementation and sulfide MVT mineralization. Most of the dolostone volume (60-70%) is a replacive dolomite with a characteristic fabric-retentive texture and low porosity. Results indicate that the dolomitization process was primarily controlled by the structure of the area, as well as the limestone facies and the early diagenetic processes. |
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