Résumé: The Granada Basin is one of the most typical intramontane basins in the Betic Cordilleras. A turbidite-evaporitic sequence of upper Miocenic age is one of the deposita found in the Malá area (SW of Granada). Deposition occured in a sea which was closed in and where water circulation was restricted and only episodically comunicated
with the open sea; thus it is a transition from a marine to a lacustrine environment.
The sequences of primary internal sedimentary structures sole marks on sandstone beds and the mineralogical composition and texture of sandstones, indicate deposition by turbidity currents. The intercalated evaporite layers and
the presence of hard grounds in the lutitic beds as well as the absence of autochtonous fossils are noteworthy inasmuch as they constitute the only features which dífferenciate these materials from the actually being deposited in deep marine basins.
Tbe lack of autochtonous fossils and biogenic structures is explained by the hypersality of the waters, where life would
be practically impossible.
On the basis of the paleocurrents and the mineralogical composition of the sandstones, the turbidity currents were
proved to originate in the Sierra Nevada area. The regional and paleogeographical data lead us to believe that fue shore
line was located 20 Km. to the East. The turbidity currents flowed from the Sierra Nevada margins to the interior of an
evaporitic basin and sediments supplied by there currents became interbedded in the evaporitic sequence. There
currents carried sediments in succesive flows either from materials carried by Sierra Nevada rivers or from deposits
previously accumulated at their mouths.
Finally, a comparison is made of this facies with flysch, taking into account the definitions and concepts of different authors. Since we are dealing with materials displaying postorogenic character tue term turbidite is used instead of flysch.
Résumé: Este trabajo da una primera interpretación sedimentaria y una reconstrucción paleogeográfica
de los materiales conglomeráticos neógenos de parte de la Depresión de Granada.
El modelo sedimentario propuesto consiste en abanicos aluviales que penetran en medio
marino. En una fase posterior, se establece un régimen fluvial que desemboca en zonas
lacustres,
eventualmente evaporÍticas.
[ABSTRACT]
This paper offers a first sedimentary interpretation aod a paleogeographic reconstruction
for the neogenic conglomerates in a part of Granada Basin. The proposed sedimentary ruodel
consists on alluvial fans going into marine environment. Later, a braided fluviatile pattern
connected downstream with lacllstrine areas with episodic evaporite deposits establishes in
this place.
Mots-clés: Paleogeografía; Neógeno; Depresión de Granada
Résumé: Las variedades de yeso diagenético más abundantes en la Depresión de Granada, son las
siguientes: yeso microcristalino de color crema que corresponde a calizas lacustres reemplazadas
sinsedimentariamente; yeso alabastrino resultado de la transformación (vía anhidrita) de
los yesos primarios existentes (selenitas y yesos turbidíticos) y,
finalmente, yeso fibroso que
rellena grietas paralelas a la estratificación y fracturas tectónicas más tardías.
Mots-clés: Yesos, Estratigrafía, Depresión de Granada, Andalucía, España
Résumé: El presente trabajo tiene como objetivo final el evaluar la seguridad y el comportamiento, a largo plazo, de un Almacenamiento Geológico Profundo (AGP) de CO2 mediante el estudio de los procesos físico-químicos que controlan la evolución hidrogeoquímica de un sistema natural análogo a un almacenamiento artificial de CO2. Para ello, se ha estudiado el Sistema Termal de Alicún de las Torres (Provincia
de Granada), el cual está considerado como un Análogo Natural de escape de CO2 debido a que sus aguas presentan un alto contenido en carbono inorgánico disuelto (DIC), que escapa a través de un sistema de fallas de manera análoga a como ocurre en muchos almacenes naturales de dióxido de carbono y, por lo tanto, a como se espera que lo hagan en un AGP de CO2. [ABSTRACT]The work aims ultimately to provide a method of assessment of the safety and behaviour, in the longterm, of a CO2 Deep Geological Storage (DGS) through the study of the physicochemical processes which control the hydro-geochemical evolution of a natural system; analogous to an artificial storage of CO2. To do this, an integral study of the Alicún de las Torres Thermal System (province of Granada), has been carried out. This Thermal System is considered as a Natural Analogue of CO2 leakage because its waters have a high content of dissolved inorganic carbon (DIC) that escapes through an important system of faults, similar to what occurs in many other natural storages of carbon dioxide and analogous therefore to what could be expected in a CO2 Deep Geological Storage system.
Mots-clés: Aguas minerales, Dióxido de carbono, Hidrogeología
Résumé: Some results obtained in the El Tranco-Santiago de la Espada area, located in the Sierras de Cazorla y
Segura (Prebetic Zone), are shown in this note.
The established series are described and related the one the other. Several importants lacunas and the presence of an
intramiocene unconformity are pointed out. A geological scheme are included.
Résumé: This paper account for result of a first general view of the materials from the final Cretaceus to the Nummulitic, in the sud-east area of the high Course of the Segura river.
The Senonian presents southwards a more open-sea facies character. The Paleocene shows pararecifal facies.
The passage from Cretaceous to Paleocene is represented by a lithological change
or, at least, a change in the deposition conditions, without evidences for the presence of an unconformity.
The Eocene has very homogeneous facies belonging to a shallow-water environment. The thickness seems to increase
southerly.
Résumé: The succession of different stages of deformation, the last of them having taken place in the middle Miocene, has determined the imbricated structure of the Sierra de Cazorla and the easternmost boundary of the Guadalquivir Basin. The evolution of the structural features is analyzed and a tectonic interpretation of the resulting
structure is attempted.
Mots-clés:
Tectónica regional, Prebético, Cuenca del Guadalquivir
Résumé: The study of the lower member materials of the Santiago de la Espada Formation reveals the existence of two different sedimentary environments, whose characteristics are analyzed in detail.
Résumé: Oligocenic materials are well represented in the upper Rio Segura valley. These materials are described and their relations with the synchronous ones of neighbouring areas are considered. A map showing the regional distribution of facies.
Résumé: The authors define the Santiago de la Espada Formation and show its distinghishings characteristics. The limits and contacts as well as its observed shape and dimensions are described. The possible correlations with neighbouring sectors are pointed out. A detailed sedimentological study of de Formation materials is included in this paper.
Finally, the deposition environment and the origin of the materials are discused.
