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
18 results
Search Results
Now showing 1 - 10 of 18
Item El centro de interpretación de la Cueva de Castañar: un ejemplo de difusión de la investigación en Geología Sedimentaria(2011) Martín Pérez, A.; Alonso Zarza, Ana María; Martín García, Rebeca; Gil Peña, I.; Meléndez, A.; Herrero Fernández, María Josefa; Rodríguez Berriguete, Álvaro; Pérez-Monserrat, Elena M.; Charco Romero, MaríaItem 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 Carbonate tufas as archives of climate and sedimentary dynamic in volcanic settings, examples from Gran Canaria (Spain)(Sedimentology, 2022) Rodríguez Berriguete, Álvaro; Camuera, Jon; Alonso Zarza, Ana MaríaThree Holocene tufas from Gran Canaria volcanic island were studied with the aim of deciphering their sedimentary evolution through space and time. Las Temisas tufa (south-eastern arid part of the island) is dominantly composed of oncoids, intraclasts, phytoclasts, coated stems, minor thin stromatolites, and a high amount of siliciclastics. It was deposited in a fluvial system with variable flow velocities and palustrine conditions areas, which alternated with high energy events. Azuaje tufa (northern humid part of the island) is composed of coated stems, stromatolites, oncoids and phytoclasts, with relatively low amounts of siliciclastics, suggesting slow-flowing and palustrine conditions and a relatively low incidence of (high energy) floodings. Los Berrazales tufa (north-west of Gran Ganaria, the most humid one), is mainly composed of coated stems and crystalline crusts, formed in a laminar flow regime. Dominant clastic sedimentation in Las Temisas and high calcite growth rates in Los Berrazales led to a poor development of stromatolites in comparison with Azuaje. Las Temisas and Azuaje deposits have similar upward evolution with decreasing trend in siliciclastics and increasing trend in carbonates. However, Las Temisas has higher siliciclastic and lower phytoclastic contents suggesting a less vegetated area and more arid climate than in the other deposits. Additionally, tufas record local events common in volcanic terrains. Azuaje presents three units bounded by erosive discontinuities, which reveal significant erosion by enhanced runoff that could be caused by loss of vegetation due to wildfires related to volcanic eruptions at headwaters. Las Temisas record a possible interruption in sedimentation represented by aligned boulders due to rockfalls from the hillsides. These deposits formed from waters with similar chemistry providing to the carbonates their similar signals in δ13C–δ18O stable isotopes and 87Sr/86Sr ratios like that of the volcanic rocks. This work shows how, in volcanic areas, tufas are unique archives of the climate, vegetation and volcanic-related processes, because all imprint the sedimentary regime of tufa deposition.Item Chabazite and dolomite formation in a dolocrete profile an example of complex alkaline paragenesis in Lanzarote, Canary Islands(Sedimentary geology, 2016) Alonso Zarza, Ana María; Bustamante, Leticia; Huerta, Pedro; Rodríguez Berriguete, Álvaro; Huertas Coronel, María JoséThis paper studies the weathering and soil formation processes operating on detrital sediments containing alkaline volcanic rock fragments of the Mirador del Río dolocrete profile. The profile consists of a lower horizon of removilised weathered basalts, an intermediate red sandy mudstones horizon with irregular carbonate layers and a topmost horizon of amalgamated carbonate layers with root traces. Formation occurred in arid to semiarid climates, giving place to a complex mineralogical association, including Mg-carbonates and chabazite, rarely described in cal/dolocretes profiles. Initial vadose weathering processes occurred in the basalts and in directly overlying detrital sediments, producing (Stage 1) red-smectites and dolomicrite. Dominant phreatic (Stage 2) conditions allowed precipitation of coarse-zoned dolomite and chabazite filling porosities. In Stages 3 and 4, mostly pedogenic, biogenic processes played an important role in dolomite and calcite accumulation in the profile. Overall evolution of the profile and its mineralogical association involved initial processes dominated by alteration of host rock, to provide silica and Mg-rich alkaline waters, suitable for chabazite and dolomite formation, without a previous carbonate phase. Dolomite formed both abiogenically and biogenically, but without a previous carbonate precursor and in the absence of evaporites. Dominance of calcite towards the profile top is the result of Mg/Ca decrease in the interstitial meteoric waters due to decreased supply of Mg from weathering, and increased supply of Ca in aeolian dust. Meteoric origin of the water is confirmed by C and O isotope values, which also indicate lack of deep sourced CO2. The dolocrete studied and its complex mineral association reveal the complex interactions that occur at surface during weathering and pedogenesis of basalt-sourced rocks.Item Controlling factors and implications for travertine and tufa deposition in a volcanic setting(Sedimentary Geology, 2019) Rodríguez Berriguete, Álvaro; Alonso Zarza, Ana MaríaThis work studies a fossil system of perched and fluvial travertines passing distally to fluvial tufas within a volcanic ravine. Sedimentology, petrology and geochemistry of fossil aragonitic-calcitic travertines and downstream calcitic tufas from the Azuaje volcanic ravine were studied. These spring-related carbonates seem to be formed after the Mid-Holocene climate change, the transition from a monsoon-dominated humid climate to an arid-semiarid climate controlled by trade winds. The main travertine facies include rafts, dendrites/shrubs, ooids, oncoids and stromatolites among others, whereas tufas are characterised by phytoclasts, oncoids, coated stems, intraclasts and stromatolites. Facies observed can be (i) microbial-influenced when the microbial growth rate is greater than the precipitation rate and flow energy is not above the threshold value tolerated by microbes, or (ii) inorganic-dominated if the precipitation rate exceeds that of the microbial growth rate and/or flow energy is above the threshold tolerated by microbes. Travertine facies vary from mostly inorganic to microbially-dominated, whereas tufa facies are mostly microbially-influenced. Observed changes of facies in both travertines and tufas were interpreted as due to changes in environmental conditions from (a) less to more evaporative, (b) less saturated to oversaturated, and (c) high to low energy. Changes in textures, mineralogy, geochemistry and stable isotope composition downstream from travertine to tufa suggest a decrease in the CaCO3 precipitation rate and an increase in microbial influence from travertines (proximal part of the system) to (distal) tufas. Our study case illustrates the wide variety of facies and processes operating in spring-related travertine and tufa deposits. The details of arrangement, mineralogy, facies and geochemistry of the deposits were mostly controlled by climate and hydrogeology, although the volcanic setting, provided suitable conditions for spring‑carbonate deposition.Item Gypsum speleothems in lava tubes from Lanzarote (Canary Islands). Ion sources and pathways(Sedimentary Geology, 2019) Huerta, Pedro; Martín Pérez, Andrea; Martín García, Rebeca; Rodríguez Berriguete, Álvaro; La Iglesia, Á.; Alonso Zarza, Ana MaríaLava tubes from Lanzarote Island in the Canary Archipelago commonly show white speleothems that stand out from the black basaltic rock. Mineralogical analyses of the speleothems from El Covón and Chifletera lava tubes show that gypsum is the dominant mineral with minor amounts of halite. Speleothems composed of microcrystalline gypsum (up to 150 μm long) are: coatings, globules, or extensive white powder accumulations covering the tube floor. Those composed of macrocrystalline gypsum with millimetric-size tabular and lenticular crystals are: crusts and stalactites. Uranium series dating of speleothems show ages ranging from 6217 ± 1644 yr to 40,039 ± 4748 yr. δ34S and the δ18O of gypsum speleothems (δ34S is 20.97‰ V-CDT and δ18O is 9.78‰ V-SMOW) is similar to that of sulphate dissolved in seawater. 87Sr/86Sr from speleothems (0.708665–0.708976) suggests that the main source of Ca is seawater, but additional Ca contributions from aeolian dust have reduced the Sr isotope values. These data support the idea that gypsum precipitates in the lava tube by evaporation of marine spray or solutions derived from marine spray. Two probable vias for ions input into the lava tube are considered: 1) sea spray circulating through the lava tube; 2) low-frequency rain infiltration leaching the marine spray salts precipitated at the surface. The constant supply of ions from sea spray, air currents in the cave, and the fast, but partial, evaporation due to the high relative humidity in the lava tube favours accumulation of major amounts of gypsum and subordinately halite. Scarcity of precipitation in the western Canary Islands prevents dissolution of gypsum speleothems.Item Lacustrine microbialite pinnacles in the Palaeogene of Patagonia, Argentina: Facies and controls(Sedimentary Geology, 2020) Alonso Zarza, Ana María; Cabaleri, Nora G.; Huerta, Pedro; Armella, Claudia; Rodríguez Berriguete, Álvaro; Monferran, Mateo D.; Gallego, Oscar F.; Ubaldon, María Cecilia; Silva Nieto, DiegoLarge carbonate microbialite build-ups are relatively uncommon in ancient fresh-water lacustrine basins as compared with those marine and saline environments. This paper discusses the formation of a large continental lacustrine deposit, the Oligocene-Miocene Carinao Formation in Argentina, which contains large bioherms. The lacustrine formation occurs in N-S corridor and is mostly composed by meter scale pinnacles and sheet-like carbonate beds that grade to detrital deposits towards the more subsident southern areas. The main facies are autochthonous and allochthonous limestones and detrital deposits. The autochthonous limestones include the carbonate pinnacles, which are about 4 m high and 0.5 m in diameter and coalesce laterally to form very continuous beds (several kms). The pinnacles are formed by plate-like, dome, vertically elongated and irregular horizontal bioherms, most of them with radial structure. The bioherms are boundstones of fibrous (fans and spherulites) and feather calcite crystals, micrite and inequigranular calcite mosaics. Both biogenic and abiogenic processes interfered in carbonate precipitation. Allochthonous limestones include peloidal, ostracod and intraclastic limestones, some containing coated grains. Polymictic conglomerates and cross-bedded hybrid arenites deposited in a fluvial-deltaic system located at the southwest of the basin. δ13C values vary between −0.4 and −3.2‰ VPDB and δ18O are comprised between −5.7 and −8.6‰ VPDB. The 87Sr/86Sr ratios range between 0.7061 and 0.7056. The Carinao Formation deposited in a fresh-water lake, sourced by meteoric and deep-groundwater. Tectonics was a main control determining the configuration of the lake system, the water supply and the alignment of some bioherms. The vertical succession or the different bioherms morphologies reflects well the lake level changes controlled by both tectonic and climate.Item 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 Landscape modification due to agricultural irrigation: Carbonate tufa formation on Tenerife, Canary Islands, Spain(Anthropocene, 2021) Alonso Zarza, Ana María; Casillas, Ramón; Rodríguez Berriguete, ÁlvaroThe use of irrigation water on Tenerife has modified the hydrogeological system resulting in the formation of an anthropogenic carbonate tufa. The processes involved in its formation are: 1) infiltration of rainwater and mixing with groundwater rich in volcanic carbon dioxide (CO2), 2) weathering of volcanic rocks increasing the ion content of the water, 3) extraction of this water from subterranean galleries and channels and spilling it onto the Lomo Morin slope, 4) mechanical CO2 degassing and photosynthetic activity driving calcite precipitation. The tufa consists of boundstones of algae and coated stems of reeds, along with laminated microbial crusts. Textures range from microspar to coarse mosaics to fibrous-radial calcite, all containing biogenic features. The presence of the green macroalga Blidingia is noticeable. Carbon stable isotope ratio (δ13C) varies between -3.58 and +1.03‰ VPDB (Vienna Pee Dee Belemnite) and oxygen stable isotope ratio (δ18O) between -6.77 and -5.00‰ VPDB, highlighting the largely meteoric origin of the water with some addition of deep CO2. A strontium isotope ratio (87Sr/86Sr) of 0.7030 confirms the weathering of volcanic rocks as the source of calcium. The Lomo Morin tufa provides a scale model of how water use contributes to rapid landscape change through alterations in the hydrogeological system. It also provides a good example of a CO2 sink in a continental setting, and is comparable to the global carbon cycle, which mostly involves marine limestones. Although anthropogenic processes are commonly viewed negatively, the human modification of the hydrogeological system reported in this study has produced changes to geological and ecological conditions that have increased the geo - and biodiversity of the island.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.