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Tornos Arroyo, Fernando ; Delgado Huertas, Antonio ; Casquet, César ; Galindo Francisco, Mª del Carmen | Springer Science Business Media | 2000The Eastern Iberian Central System has abundant ore showings hosted by a wide variety of hydrothermal rocks; they include Sn-W, Fe and Zn-(W) calcic and magnesian skarns, shear zone- and episyenitehosted Cu-Zn-Sn-W orebodies, Cu-W-Sn greisens an[...]texto impreso
Galindo Francisco, Mª del Carmen ; Casquet, César ; Tornos Arroyo, Fernando | Sociedad Geológica de España | 2010Episodic hydrothermal alterations in the Sierra de Guadarrama took place between ca. 300 Ma and 10 Ma. New K-Ar ages for hydrothermal minerals have been obtained that along with previous data allow to better constrain the late- to post-Variscan [...]texto impreso
En el presente trabajo se estudian las litologías gneísicas glandulares que afloran en la ladera este del Macizo de Peñalara (Sistema Central Español), en base a la interpretación del quimismo de las biotitas de glándulas y mesostasia y del [...]texto impreso
Galindo Francisco, Mª del Carmen ; Darbishyre, D.P.F. ; Tornos Arroyo, Fernando ; Casquet, César | Sociedad Geológica de España | 1993Sm-Nd dating of F-Ba (Pb-Zn) veins enclosed in adamellites of the Spanish Central System suggests an age of 752±25 M.a. (Late jurassic) for this hydrothermal stage. This age supports an unconformity-related origin for this style of mineralizatio[...]texto impreso
Caballero Donoso, José María ; Casquet, César ; Galindo Francisco, Mª del Carmen ; González Casado, José Manuel ; Snelling, N. ; Tornos Arroyo, Fernando | Sociedad Geológica de España | 1992Preliminary results are presented on the age of the hydrothermal activity recorded in the Sierra del Guadarrama. They are among the first data generated by the K-Ar Spectrometry Lab. of the CSIS-UCM at Madrid. Hydrothermalites include different [...]texto impreso
El skarn del Carro del Diablo es un tipo desconocido en el Sistema Central Español. Se forma por interacción hidrotermal tardi y postmagmática entre los mármoles dolomíticos de la Serie Inferior y la parte apical del stock granítico de Rascafría[...]texto impreso
Caballero, José María ; González Casado, José Manuel ; Casquet, César ; Galindo Francisco, Mª del Carmen ; Tornos Arroyo, Fernando | Universidad Complutense de Madrid. Departamento de Estratigrafía | 1996Las episienitas de la Sierra de Guadarrama (Sistema Central español), las cuales son resultado de la alteración hidrotermal (decuarcificación y alcalinización) de granitoides, constituyen un conjunto litológico desarrollado en el Pérmico Inferio[...]texto impreso
Tornos Arroyo, Fernando ; Iriondo, Alexander ; Casquet, César ; Galindo Francisco, Mª del Carmen | Sociedad Geológica de España. | 2004Ar-Ar dating of intercumulus phlogopite for both a websterite fragment within the mineralized breccia pipe of the Ni-(Cu) Aguablanca magmatic deposit; and the host gabbronorite has yielded ages of 335±2 to 338±3 Ma, i.e., Visean (Mississippian).[...]texto impreso
Sanabria Orellana, Raúl ; Casquet, César ; Tornos Arroyo, Fernando ; Galindo Francisco, Mª del Carmen | Sociedad Geológica de España | 2005Stratoid magnetite and skarn magnetite were mined at the San Guillermo mine district. Structural and textural evidence suggest that they formed by replacement of older rocks in Variscan orogeny times during a protracted process that begun with f[...]texto impreso
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Both magmatic Ni–(Cu) and hydrothermal iron oxide–copper–gold mineralization coexist in ancient belts but their relationship remains poorly known. Geochronology and field geology evidence show that in SW Iberia both styles of mineralization were[...]texto impreso
Tornos Arroyo, Fernando ; Casquet, César ; Galindo Francisco, Mª del Carmen ; Velasco Roldán, Francisco ; Canales Gallarosa, Ángel | Springer Science Business Media | 2001The Aguablanca deposit represents a new style of magmatic Ni Cu mineralization in discordant sulfide rich pyro xenitic breccia pipes. The orebody is hosted by Variscan calc alkaline diorites and gabbros which intruded during an oblique subductio[...]texto impreso
González Casado, José Manuel ; Caballero Donoso, José María ; Casquet, César ; Galindo Francisco, Mª del Carmen ; Tornos Arroyo, Fernando | Elsevier Science B.V., Amsterdam | 1996Several episodes of hydrothermal activity related to periods of fracturing and/or reactivation of previous structures took place from 300 to - at least - 100 Ma, in the Sierra del Guadarrama, which is part of the crystalline axis of the Iberian [...]texto impreso
García Guinea, Javier ; Tornos Arroyo, Fernando ; Azumendi García, Oscar ; Ruiz Pérez, Javier ; Correcher Delgado, Virgilio | Taylor & Francis | 2011Calcium–aluminum-rich inclusions (CAIs) of Allende CV3 chondrite were studied by Environmental Scanning Electron Microscopy (ESEM), Energy Dispersive Spectrometry (EDS), Backscattering (BS), and Spectra Cathodoluminescence (CL). CAI minerals sho[...]texto impreso
Galindo Francisco, Mª del Carmen ; Tornos Arroyo, Fernando ; Darbishyre, D.P.F. ; Casquet, César | Elsevier Science B.V., Amsterdam. | 1994Fluorite and barite-rich veins ( + sulphides) of the Sierra del Guadarrama (Spanish Central System) are usually hosted by Hercynian granitoids. Zoned fluorites from one of these veins have a Sm-Nd age of 145 ± 18 Ma. This age is similar to the K[...]
