Thesis Collection
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Browsing by Author "Brändle, José Luis"
Now showing items 1-20 of 22
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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 ... -
Análisis de enjambres de cliques radiales utilizando un método matemático
(1991)It is proposed, a computer program to help to the interpretation of radial dykes swarms and locate the possible emission zones, using the analysis of theoretical intersection of the dykes, considered as straight lines on ... -
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 ... -
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 ... -
El edificio sur (Jandía) de la serie I de Fuerteventura: rasgos generales
(Sociedad Geológica de España, 1991)The Jandia is one of the three main edifices identified in the Old Basaltic Series of Fuerteventura. lt shows now a semicircular shape with a nortwards facing opening. This large volcano built up by lava flows and pyroclastics ... -
Edificios volcánicos en la Serie I de Fuerteventura: Rasgos generales del edificio central
(Sociedad Geológica de España, 1990)The Old Basaltic Series in Fuerteventura is formed by three main edifices: Northern, Central and Southern (or Jandía) Edifices. The Central Edifice, a shield volcano, extends from El Jable towards Valles Ortega area forming ... -
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 manto Iítosférico en el sureste de España: Aportaciones de los xenolitos englobados en rocas alcalinas del mioceno-plioceno
(Sociedad Geológica de España, 2002)Pliocene-Quaternary nephelinitic and alkali basaltic lavas and pyroclastic deposits from Cofrentes and Tallante and Miocene lamproitic lavas from Aljorra host xenoliths and megacrysts of lithospheric mantle origin. The ... -
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 ... -
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 ... -
Los diques básicos del Edificio volcánico principal de la isla de São Vicente (Cabo Verde)
(Universidad de Huelva, 2011)En la isla de São Vicente (Cabo Verde) son muy frecuentes los diques básicos que atraviesan el edificio volcánico principal de la isla: el Edifiico São Vicente. Éstos aparecen en dos enjambres principales: sills que se ... -
Minerales accesorios en el monzogranito de Las Navas del Marqués (Sistema Central Español)
(Sociedad Geológica de España, 1990)El objeto de este trabajo es el estudio de los minerales accesorios en el monzogranito de Las Navas del Marqués. Se discuten en detalle, no sólo sus características descriptivas sino también las genéticas. Las variaciones ...
