Thesis Collection
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Browsing by Author "Huertas, María José"
Now showing items 1-20 of 34
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Alineaciones de centros volcánicos en la isla de Tenerife
(Sociedad Geológica de España, 1994)A mathematical method has been used to determine the alignments of effusive centers in the Recent Series of the Tenerife island. The strike of these lineations varies from one sector to another, in this way, on the ... -
Características composicionaies y procesos de evolución magmàtica en el complejo volcánico Sur - II de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)The Southern Volcanic Complex II consists mainly of basalts with some trachybasalls and basaltic trachyandesltes. Its lower sequence is formed by middle alkaline rocks whilst in the upper one only m ild ly alk ali H y + O ... -
Características composicionales del Complejo Volcánico Sur I de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1995)The Southern Volcanic Complex I consists mainly of basalts with scarce felsic members. On the basis of chemical and mineralogical compositional features two groups could be considered. Both groups are alkaline, the first ... -
Características composícionales y procesos de evolución magmàtica en el Complejo Volcánico Central (I y II) de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)The Central Volcanic Complex / (CVC-I) consists mainly of mildly alkaline basalts, many of them ankaramitic. The compositional differences observed are explained by fractionation and extraction (rates between 20% and 30%) ... -
Características composicionales y procesos de evolución magmàtica en el complejo volcánico sur-lll de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)The Southern Volcanic Complex III is form ed by basalts, a lesser am o u n t o f trachybasalts and some scarce trachytes, a ll o f them m ild ly alkaline. Crystal fra ction ation w a s in an early stage, controle d by ... -
Composición y evolución de las lavas de la isla de Branco (Cabo Verde)
(2006)The first data about the composition of lava flows from Branco Island (Cabo Verde) are presented in this work. Most lava flows in the sequence are alkali basalts (Fo84-76 olivine, En44-36 diopside, An83-31 plagioclase) showing ... -
Cronología Rb-Sr y K-Ar de diques de la Sierra de Guadarrama (Sistema Central Español)
(Sociedad Geológica de España, 1994)Two calcalkaline granite porphyries, an E-W and a N-S trending one, and three monzonitic dykes striking NE-SW, have been dated. For the first dyke a whole rock Rb-Sr isochrone age of296±3 Ma, i.e. Upper Carboniferous, is ... -
Distribución de los diques sálicos del Norte de la isla de La Gomera
(Sociedad Geológica de España, 1999)The distributidn of felsic dykes on La Comera northern area corresponds to several swarms. The first radial dyke swarm is centered on the Tamargada area. The second radial dyke swarm center, located farther west, south of ... -
Edad de los diques sálicos del Norte de la isla de La Gomera
(Sociedad Geológica de España, 2001)Several trachytic and phonolitic, radial and conical dyke-swarms crop out on the La Gomera northern region. The first age data obtained situate the intrusion episodes coinciding in time with the extrusion of the Old Basalts. ... -
Edad de los domos sálicos de la isla de La Gomera
(Sociedad Geológica de España, 2002)The new radiometric data from felsic domes on La Comerá allow to separate two different felsic both intrusive and extrusive episodes on the island. The early one, upper Miocene in age, includes the domes on the eastern ... -
Edad y composición del volcán de Bienvenida (Campos de Calatrava)
(Sociedad Geológica de España, 2019)Se ha datado radiométricamente (K/Ar) el volcán de Bienvenida, uno de los volcanes de melilititas olivínicas más representativo de la región volcánica de Campos de Calatrava. Se ha analizado la roca y las principales ... -
Edades 39Ar/40Ar de los depósitos de Roques de García (Las Cañadas, Tenerife)
(Sociedad Geológica de España, 2000)During the evolution of the Las Cañadas volcanic edifice, debris avalanches were very significant destructive events. The Roques de Garcia unit was generated by such an event. 39Ar/40Ar dating has been carried out on ... -
Edades 40Ar-39Ar del Complejo Basal de la isla de La Gomera
(2008)This essay shows some new dating of the Basal Complex of La Gomera Island and among them, the first ones obtained using the 40Ar-39Ar methodology. Two of them are rocks of the Submarine Edifice. In the first one we obtain ... -
El Edificio Antiguo de la isla de San Vicente (Cabo Verde): características del sector occidental
(2006)A more than 1000m thick pile of basaltic lava flows and pyroclasts dipping seawards rises on the western sector of San Vicente. Several systems of dikes cut across the succession that is composed of two different sequences. ... -
El Olivino de las rocas volcánicas miocenas de la isla de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)Olivine phenocrysts are always present in the Miocene basalts of Fuerteventura, whilst they are scarce in the trachybasaltic types. Notwithstanding, olivine is common as part of the groundmass in these trachybasalts. This ... -
El Piroxeno de las rocas volcánicas miocenas de la isla de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)Pyroxene (dio psid e o r augite) is p re se n t in a ll rocks o f th e M io c e n e V o lc a n ic C om plexes on Fuerteventura. Pyroxene phenocrysts are specially abundant in basalts, in which they represent a third of all ... -
Un episódio volcánico pre-Cañadas en la Isla de Tenerife
(Sociedad Geológica de España, 1994)Based on new radiometric data, a Pre-Cañadas volcanic building of 3.5-3.0 Ma has been defined. This new building is mainly compared of basaltic rock cropping out in several gorges to the S of Cañadas Building, inside of ... -
Geología de la isla de Branco (Cabo Verde)
(Sociedad Geológica de España, 2005)The morphological, structural and volcanological aspects of Branco, an island of the Cape Verde Archipelago, are described and interpreted in this work. The isle consists of a 700 m thick pile of basalt lava flows and scarce ... -
Geometría del enjambre de diques cónicos de Vallehermoso La Gomera (Islas Canarias)
(Sociedad Geológica de España, 1999)A mainly phonolitic, 10 km in diameter, cone-sheet complex crops out on the northern area of La Comera. The swarm intrudes into the Basal Complex, The Old Basalts and other rocks of the Trachytic-phonolitic Complex to which ... -
Geoquímica de las rocas intrusivas sálicas del sur de la isla de Tenerife
(Sociedad Geológica de España, 2017)En el sur de la isla de Tenerife, en el Edificio Roque del Conde, se encuentran estructuras en forma de domo denominadas “Roques", formadas por rocas intrusivas sálicas de composiciones ácidas e intermedias, fuertemente y ...
