Thesis Collection
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Browsing by Author "López García, José Ángel"
Now showing items 1-8 of 8
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Caracterización de los minerales del dique gabroideo de Messejana - Plasencia en su sector nor-oriental
(Sociedad Geológica de España, 2005)In the gabbroic Messejana–Plasencia dyke we have distinguished three types of pyroxenes: enstatite, pigeonite and augite. Enstatite and augite have been the first minerals that have crystallized at high T (1100ºC – ... -
Caracterización mineral del granito peralumínico de Logrosán (Cáceres, España)
(Universidad de Huelva, 2011)El granito de Logrosán (Cáceres, España) comprende un complejo stockwork intragranítico de venas de Sn-W y venas de fosfato periféricas encajadas en el Complejo Esquisto Grauváquico (CEG). El emplazamiento del granito de ... -
Estimación de la composición del manto subcontinental en el centro de España a partir de los materiales básicos hercínicos y post-hercinicos del Sistema Central Español
(Sociedad Geológica de España, 2002)Basic magmatism in Central Spain occur sporadically during a long period of ca. 140 Ma. The scarce data set of incompatible trace element geochemistry and initial isotopic ratios (Sr, Nd) on mantle-derived basic magmatism ... -
Estudio de inclusiones fluidas en granitos microfisurados. Mineralizaciones de W-Sn del Sistema Central Español
(Sociedad Geológica de España, 1996)The geometry of the ore fluid migration was investigated in the (W-Sn) mineralizated granites of the Spanish Central System. Based on microthermometry, Raman microprobe and textural relationships, six types of fluid ... -
Estudio de la composición isotópica (Pb-S-O) de las mineralizaciones Pb-Zn de Mazarambroz (Banda Milonítica de Toledo)
(Sociedad Geológica de España, 2005)Combined lead, sulphur and oxygen isotopes have been analysed in ore (galena and sphalerite) and associated (quartz, barite) minerals from the Mazarambroz Pb-Zn mineralization. Lead isotopic model ages in galenas cluster ... -
Fluidos asociados a filones de cuarzo en la Sierra de Guadarrama. Sistema Central Español
(Sociedad Geológica de España, 1996)Fluids together with alteration were studied in representative hydrothermal barren quartz veins from central part o f Sierra de Guadarrama (Spain). Three types o f fluids have been distinguished: (i) an early fluid stage ... -
Geoquímica y origen de los fluidos asociados a los yacimientos de fluorita de "Berbes-La Cabaña" y "La Collada" (Asturias)
(Sociedad Geológica de España, 1996)This study evaluates a-CI-Br systematic of fluid inclusions in fluorites from "Berbes-La Cabaña" and "La Collada" districts in Asturias (N of Spain). The fluorites were formed as H20-NaCI-Ca2CI fluids represented by primary ... -
Transformación de andalucita a sillimanita en granitos peralumínicos del batolito de los Montes de Toledo: implicaciones petrogenéticas
(2008)The Montes de Toledo Batholith comprises several felsic peraluminous granitic plutons characterized by the presence of two Al2SiO5 polymorphous: andalusite and sillimanite (as fibrolitic variety). Textural features indicate ...
