Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain) (Record no. 187619)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03023nab a2200241 4500 |
| 008 - CÓDIGOS DE INFORMACIÓN DE LONGITUD FIJA - INFORMACIÓN GENERAL | |
| Campo de control de longitud fija | 260224s2012 xxu ing |
| 041 ## - IDIOMA | |
| Idioma | Inglés |
| 245 00 - TITULO | |
| Título | Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain) |
| Subtítulo | Nature and Origin of Dolomites and Dolomitising Fluids |
| 260 ## - PUBLICACION, DISTRIBUCION, ETC | |
| Lugar de publicación, distribución, etc. | |
| Nombre de publicador, distribuidor, etc. | |
| Fecha de publicación, distribución, etc. | ene./feb. 2012 |
| 270 ## - FECHA DE CARGA | |
| Fecha de carga | 19/04/2013 ; 19/04/2013 |
| 300 ## - DESCRIPCION FISICA | |
| Otra extensión | 25 p. ; 97-122 |
| 520 ## - RESUMEN, ETC | |
| Resumen | Transcripción del resumen del autor: This study documents the temporal and lateral variation in petrographic and geochemical signatures of fault-related dolomite bodies in the Ranero and El-Moro areas (Karrantza valley, Cantabrian mountains; NW Spain). These dolomite bodies are hosted in Albian carbonates, which were deposited in the Basque-Cantabrian Basin as a result of an intense rift-related subsidence with associated faulting along various orientations. Fluid circulations generated replacive and cement dolomites, paragenetically followed by various calcite cements. Petrography, mineralogical and geochemical investigations (XRD, ICP, XRF, stable and Sr isotopes) helped in distinguishing hydrothermal stages. Two major dolomite facies were observed according to their Fe-content. Early dolomites are ferroan and replace limestone more significantly than the later, non ferroan dolomites. Dolomites are generally stoichiometric (49.76 to 51.59 M% CaCO3) and exhibit a broad range of depleted d18O values (–18.7 to –10.5‰ V-PDB), which may indicate multiphase dolomitisation and/or different degrees of recrystallisation. Decreasing d18O values correlate with decreasing Fe content in dolomites. In the Ranero area, dolomites show less slightly depleted d13C values (–0.15 to +2.13‰ V-PDB) relative to the host limestone d13C signature, while these values are substantially more depleted in El-Moro area (down to –2.18‰ V-PDB). Hydrothermal calcites predating dolomitisation show less depleted d18O values (–14.15 to –12.1‰ V-PDB) than postdolomitisation calcite (–18.1‰ V-PDB). Sr isotope data suggest that the fluids interacted with siliciclastic lithologies (sandstone, shale). The dolomite fabric is variably altered through dedolomitisation and cataclastic deformation. Dolomitisation occurred in at least two main episodes. A first episode of pervasive ferroan dolomitisation probably resulted from compactional dewatering of basinal fluids from the nearby Basque trough and hydrodynamic fluid flow along the faults/fractures in the Albian carbonate platform. Subsequently, a second episode of very hot and localised dolomitisation may be related to igneous activity and convective flow. |
| 581 ## - ESTADO DE COLECCIÓN | |
| Estado de colección | 1 |
| 773 0# - CORRECCIÓN | |
| Título | Oil and Gas Science and Technology |
| Partes relacionadas | 67 |
| 942 ## - DESC. DE MATERIAL | |
| Tipo de item KOHA | Artículo de Revista |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Shah, M.M. |
| 9 (RLIN) | 53042 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Nader, F.H. |
| 9 (RLIN) | 33385 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Garcia, D. |
| 9 (RLIN) | 45586 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Swennen, R. |
| 9 (RLIN) | 36689 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Ellam, R. |
| 9 (RLIN) | 53053 |
| Biblioteca propietaria | Biblioteca actual | Fecha de adquisición | Inventario | Total de préstamos | Inventario | Fecha de carga | Tipo de item KOHA |
|---|---|---|---|---|---|---|---|
| Biblioteca Alejandro Angel Bulgheroni | Biblioteca Alejandro Angel Bulgheroni | 06/03/2026 | 200059753 | 200059753 | 06/03/2026 | Artículo de Revista |
