Thesis Collection
Last Deposit
Browsing Geogaceta -- Nº 13, (1992) by Issue Date
Now showing items 1-20 of 36
-
Un ejemplo de tectónica salina: el sector NE del Surco de Valencia
(Sociedad Geológica de España, 1992)The messinian salt develops salt rollers, pillows and diapirs in the linking zone between the Valencia Trough and the Provenga! Basin. The correlation of the different structures based on the sedimentary wedges linked to ... -
Primeros resultados obtenidos en experiencias de laboratorio destinadas a caracterizar el comportamiento de contaminantes inorgánicos en materiales arenosos
(Sociedad Geológica de España, 1992)We describe the lisimetric column construction and we test it with two experiments using inorganic polluants in a sandy sample. We notice the tampon effect in the soil with the pH variations, and we observe the different ... -
Geocronología por el método Rb-Sr de las episienitas de la Sierra del Guadarrama, S.C.E., España
(Sociedad Geológica de España, 1992)Rb-Sr dating by internal isochrones of the episyenitea (hydrothermally dequartzified and alkalimetasomaticed granites) from the Sierra de Guadarrama gives an age of 274+-6 M.y., i.e.. Early Permian. The epysienites were ... -
Análisis comparativo de anomalías hidroquímicas del acuífero de Madrid
(Sociedad Geológica de España, 1992)The mineralization of 43 groundwater brackish samples collected from wells located in marginal areas of the Madrid acuifer are compared in this paper. This analysis shows some significatives differences between the three ... -
El surco paleogeográfico de Trucíos-Somorrostro (Albiense Inferior, W. Vizcaya)
(Sociedad Geológica de España, 1992)Detailed mapping and facies analysis of onshore Lower Albian sequences in the Trucfos-Somorrostro area led to the establishment of a major paleogeographic trough for the Lower Albian. Listric faulting on the western edge ... -
Contribución al conocimiento geológico y geoquímico de los granitos de Albalá y Montánchez (Extremadura Central) y su relación con las mineralizaciones de estaño y wolframio
(Sociedad Geológica de España, 1992)D etailed geological mapping o f the granitoids that make this part o f Central Extremadura ( A lb a li and Montanchez stocks) shows different magmatic rocks which have been geochemically characterized using major, trace ... -
Secuencias deposicionales en las facies terrigenas del Cretácico en la región del Alto Tajo (Cordillera Ibérica). Provincias de Guadalajara y Cuenca
(Sociedad Geológica de España, 1992)Four depositionsI sequences have been recognized in the Cretaceous terrigenous facies in the studied area of the Iberian Ranges. The 1st and 2nd sequences are caracteristics of continental environments, and the 3th and 4th ... -
Pistas fósiles en la «Serie de Carrascalejo». Implicaciones cronoestratigráficas
(Sociedad Geológica de España, 1992)Trace fossils (Cruziana and Rusophycus) are described for the first time in the Carrascalejo beds. The stratigraphy of this unit is also modified; the conglomeratic basal beds are included in the underlying Precambrian ... -
Propiedades petroestructurales de rocas madres de petróleo. Pizarras bituminosas del Cretácico superior de la cuenca vascocantábrica
(Sociedad Geológica de España, 1992)Black shales from Carai (Vizcaya) have been studied from the following points of view: mineralogy, geochemistry (pyrolysis rock-eval), porosimetry measurements and clay fabric. Data obtained suggest that: a) The presen ce ... -
Dinámica de la vegetación actual y aplicación de su espectro polínico en la reconstrucción de la paleovegetación en la Sierra de la Paramera (Avila, España)
(Sociedad Geológica de España, 1992)In this study we will show pollinic data of the present spectra of several transects carried out in the mountain range 'Sierra de la Paramera', situated in the province of Avila. These data reflect the variations in the ... -
Metapelitas de alta presión de la Unidad de Santiago (Complejo de Ordenes, NO del Macizo Ibérico)
(Sociedad Geológica de España, 1992)A high - pressure - low - to intermediate temperature eo - Hercynian metamorphic event characterizes the tectonothermal evolution of the Santiago Unit, in the western margin of the Ordenes Complex. P-T conditions fo r the ... -
Breves consideraciones en relación a la expresión "Minerales y rocas industriales"
(Sociedad Geológica de España, 1992)In this communication, we`ll do short considerations about commoly used expression of "minerals and industrial rocks", in our opinion, totally incomplete, and we`ll plan an alternative to suply its deficiencies -
Evolución tectonotermal de la Unidad de Santiago (Complejo de Ordenes): un ejemplo de subducción eo-hercín¡ca y descompresión sin-colisional
(Sociedad Geológica de España, 1992)The syn-D2 uplift of the Santiago Unit, inmediately after of the high-pressure eo-Hercynian metamorphic event, cause a markedly decompressive-slightly prograde P,T,t path. This path very likely suggests that the majority ... -
Existencia de una plataforma carbonatada del Albiense Superior entre materiales terrígenos de mar somero (Karrantza-Trucíos, Bizkaia)
(Sociedad Geológica de España, 1992)Facies analysis and distribution in the Karrantza and Trucfos Valleys have allowed a detailed correlation of Upper Albian series. A new carbonate platform belonging to the Urgonian Complex is described and correlated with ... -
Las pistas fósiles del Alcudiense superior en el anticlinal de Ibor. Consideraciones cronoestratigráficas
(Sociedad Geológica de España, 1992)New discovery of trace fossils in the Upper Alcudian of the Ibor anticline indicate that its supposed Precambrian age should be maintained but tentatively, due to the presence of scarce Lower Cambrian trace fossils although ... -
Análisis de la fracturación asociada a las alteraciones hidrotermales de tipo Greisen y Episienita en la Sierra del Guadarrama
(Sociedad Geológica de España, 1992)Several episodes of hydrothermal activity have recently been dated in the Sierra del Guadarrama (Caballero et ai, 1992a). Stress analysis based upon the fault sets associated with 300-290 M.a. (Wlodes and greisens) and ... -
Contribución al conocimiento de la dinámica de la vegetación en el sector oriental del Sistema Central español, en base al análisis polínico
(Sociedad Geológica de España, 1992)Based on the study of the peat-b o g PM VII, located in the Puerto de Morcuera, both the vegetation dynamics and the anthropic influence in the last 1.000 years have been elucidated. Near 640± 50 BP (UCRA-362) this area ... -
Litificación de carbonatos lacustres Miocenos. Cuenca de Madrid: ¿Implicaciones en el estudio de la diagénesis de carbonatos marinos calcíticos?
(Sociedad Geológica de España, 1992)As a possible model for lacustrine carbonate diagenesls, and as a guide for understanding calcitedominated marine limestones, a range of indurated Miocene limestones from the Madrid Basin were studied. Despite very shallow ... -
Breve introducción al estudio de las mineralizacíones industriales conquenses: los materiales geológicos metalúrgicos
(Sociedad Geológica de España, 1992)We shall try to do a short synthesis w ith this comm unication, which will be of use for a future study about industrial mineralisations in Cuenca. For this purpose, we shall establish a sucession of groups concerning the ... -
Secuencia diagenètica temprana de la plataforma carbonatada con paleocarst de Arenillas (Albiense, Oriñón, Cantabria)
(Sociedad Geológica de España, 1992)The five shallow water carbonate depositlonal sequences oftheAlbian Arenillas platform in Oriñón, N Spain, are bounded by palaeokarst surfaces. Detailed petrographic and cathodoluminescence studies have revealed that the ...
