Person: Rodríguez Berriguete, Álvaro
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First Name
Álvaro
Last Name
Rodríguez Berriguete
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Geológicas
Department
Mineralogía y Petrología
Area
Petrología y Geoquímica
Identifiers
4 results
Search Results
Now showing 1 - 4 of 4
Item Tobas carbonáticas como resultado del riego con aguas subterráneas ricas en CO2 de origen volcánico(Enseñanza de las ciencias de la tierra, 2019) Rodríguez Berriguete, Álvaro; Alonso Zarza, Ana María; Martín García, Rebeca; Cabrera, Mª CarmenItem Las tobas/travertinos del barranco de Calabozo: Un ejemplo de construcción rápida de un edificio carbonático alimentado por una tubería de regadío(Geotemas, 2012) Alonso Zarza, Ana María; Rodríguez Berriguete, Álvaro; Cabrera, Mª Carmen; Meléndez Hevia, Alfonso; Martín, L. F.El barranco de Calabozo, en la Isla de Gran Canaria, muestra como rasgo excepcional la presencia de un edificio tobáceo/travertínico alimentado por una tubería de un sistema de regadío. La tubería se abasteció de pozos cuyas aguas son ricas en gases de origen volcánico y tienen temperaturas que alcanzan los 31ºC. En estas condiciones el agua se mineraliza con rapidez, enriqueciéndose en HCO3- y CO32-. Cuando sale de la tubería se desgasifica rápidamente (pierde el CO2) precipitando el carbonato que forma el edificio carbonático. El edificio del barranco de Calabozo es un edificio bioconstruido colgante, formado por: a) canal abastecedor (la tubería), b) pendiente c) barreras o cascadas y 4) pozas. El edificio funcionó escasas décadas y su tasa de crecimiento fue muy rápida. Esto explicaría los tres aspectos característicos de este edificio: 1) las barreras son bioconstrucciones de macrofitas, 2) las facies cristalinas gruesas son dominantes y responden a un desequilibrio fuerte por pérdida rápida de CO2 y 3) se observan rasgos diagéneticos a pesar de lo reciente que es el edificio. Las macrofitas ejercieron un papel de soporte para los precipitados inorgánicos, pero los microorganismos también jugaron un papel importante en la precipitación de las microfacies micríticas.Item Sedimentology and geochemistry of a human‐induced tufa deposit: Implications for palaeoclimatic research(Sedimentology, 2018) Rodríguez Berriguete, Álvaro; Alonso Zarza, Ana María; Martín‐García, Rebeca; Cabrera, Mª CarmenGeochemical variations across laminated tufas and travertines may reflect the growth style of the carbonate build‐up and not just climate‐related changes. This work presents the study of a carbonate deposit, formed on a ravine wall in Gran Canaria Island (Spain), from a broken pipe system used for irrigation of banana plantations. The deposit is a few tens of metres long and has a stepped morphology formed by successive cascade‐barriers and pools. The main facies are framestones of coated stems, laminated bindstones, phytoclastic wackestones and silty mudstones, all of which display micritic or coarse crystalline textures. Lamination from a framestone with coarse crystalline texture was studied from a petrological–sedimentological and geochemical perspective, and water palaeotemperatures were calculated. Lamination displaying five orders of magnitude, from daily to annual or higher, was controlled by the discontinuous supply of water. Lamination consists of crystalline laminae–discontinuity couplets at all observed scales. Estimated mean precipitation rates are 0•7 mm year−1, but discontinuity of sedimentation at all lamination orders may have involved greater precipitation rates. Whereas elemental geochemistry suggests variable conditions not far from chemical equilibrium, stable isotopes suggest that calcite precipitated under disequilibrium conditions. However, the small dimensions of the deposit and the relatively high flow velocities allowed lack of δ13C and δ18O isotope fractionation in CO2‐ nor in ‐calcite, leading to independent temperature calculations, both with mean values of 25°C. Isotopic trends found throughout lamination cannot be explained by strong changes in water temperature nor in δ13CDIC or δ18Ow. The correction made to eliminate these isotopic trends yielded narrower temperature ranges. This paper discusses the accuracy of temperature estimations despite the difficulties coming from disequilibrium and how isotopic trends through time could be explained by the growth of the deposit and not by climate‐related changes.Item The Temisas Carbonate Building: an example of a thermogene tufa system in Gran Canaria Island(Geogaceta, 2015) Pinho, Rayana Rosa Estrella de; Rodríguez Berriguete, Álvaro; Alonso Zarza, Ana María; Cabrera, Mª CarmenThe Temisas Carbonate Building (TCB) is situated in the Temisas ravine, at the SW part of the Gran Canaria Island. Four different facies were recognised: detrital, framestone, phytoclastic and a transition between the last two facies. The carbonate is mostly calcite. The sedimentary sequence indicates that the TCB was formed in a fluvial system with different subenvironments, such as cascades, channels and bars. The studied deposits correspond to the distal part of a calcareous spring deposit. Petrologically these deposits can be included in the term tufa. The stable isotope values indicate thermal origin for the CO2, so from the geochemical point of view the TCB should be considered a thermogene tufa.