Jose mangas viñuela

Universidad de Las Palmas de Gran Canaria | ULPGC · Department of Physics

The present work aims to characterize the ephemeral mineral assemblage related to the fumarolic fields of the Tajogaite volcano, formed in 2021 in La Palma Island (Canary Islands, Spain). A set of 73 samples was obtained after two sampling campaigns in different fumarole sectors of the studied area. Mineralization related to these fumaroles formed...

Grain-size distributions and skeletal assemblages of surface sediments from the Amanay Seamount, El Banquete, and Conception Bank (Canary Islands) were combined to better understand the textural variability in carbonate microfacies of seamounts in temperate waters. Grain size was determined in half phi intervals by wet-sieving (< 63 μm) and dry-sie...

On September 19, 2021, a new monogenetic volcano erupted on the island of La Palma (Canary Islands, Spain), in the northwestern sector of the Cumbre Vieja volcanic rift, at an altitude of approximately 1,050 meters. As a result of approximately 12 weeks of volcanic emissions, a pyroclastic cone about 200 meters high was formed, as well as successiv...

Within the framework of the LIGCANARIAS research project (2018-2021), the Inventory of Geological Sites of Interest of the Canary Islands has been carried out, which is part of the Spanish Inventory of Places of Geological Interest (IELIG) for the domain of this archipelago. The inventory has used the IELIG methodology adapted to an eminently volca...

We conducted a 5-year field (2017–2021) and laboratory study of the relationship between type of substrate and hatching success, embryonic development, and the quality of hatchlings in loggerhead turtle nests. Our study site, the island of Maio in the archipelago of Cabo Verde, one of the world’s largest loggerhead turtle nesting colonies, displays...

The cliff of Boughrara (Tiznit coast) shows a 24 m thick accumulation of ten coastal dune series deposited on a basal sandy-gravelly beach with Thaïs haemastoma L. and Patella sp., i.e. typical MIS5 macrofauna. The lower coastal dunes are of metric thickness and consolidated by vadose calcitic cements. One of them bears a Mytilus sp. palaeokjökkenm...

Surface sediments of Amanay Seamount, El Banquete and Conception Bank are made up of marine carbonates from heterozoan organisms of temperate waters. Provenance and grain-size analyses suggest a geospatial segmentation of microfacies. Maërl beds of Holocene-aged (McMaster and Conover, 1966), gravel-sized macroids (e.g.: rhodolites) with sand-sized...

Amanay Seamount, El Banquete, and Conception Bank are three closest submarine volcanic edifices to both Fuerteventura and Lanzarote islands (Ancochea and Huertas, 2003). Petrography, mineralogy, and geochemistry studies on 45 volcanic, 15 subvolcanic, 15 volcaniclastic, and 5 volcano-sedimentary rocks have made it possible to extend our geological...

Volcanic islands are unique settings to analyze the controls on calcrete development in settings with varied relief, climate and vegetation, and lacking carbonate host rocks. This paper discusses the formation of Quaternary calcrete profiles in Gran Canaria volcanic Island, under direct influence of the SAL (Saharian Air Layer). Calcrete profiles a...

Las Canteras beach outcrops are vestiges of palaeoenvironments that represent changes in sea level and/or climate conditions. Using broad sedimentological, mineralogical, geochemical, and dating studies, three different palaeoenvironmental facies were distinguished. (1) The lower facies was defined as beachrock, formed by decametric calcarenite lay...

Abstract The cliff of Boughrara, on the Tiznit low-plateau coastal area, shows a 24 m thick accumulation of five main sedimentary Units (U0 to U4). Ten coastal dune series can be distinguished through these Units and were deposited since the MIS 5: U0 consists indeed on a basal sandy-gravelly beach deposit with a Thaïs haemastoma L. and Patella sp....

Résumé La coupe de la falaise de Boughrara, sur le littoral du bas-plateau de Tiznit, permet de distinguer, sur une épaisseur de 24 m, l’accumulation de dix séries de dépôts dunaires côtiers, au sein de 5 unités sédimentaires principales (U0 à U4) déposées depuis le SIM 5. L’ensemble repose en effet sur U0, ensemble plage/dune où la plage fossile c...

Fossiliferous outcrops are golden gates for the study of past events. The Quaternary is a period marked by several oscillations of the sea level, resulting in several glacial and interglacial events. The Last Interglacial period, with the warmest interval occurring between ~128 ka to ~116 ka (Marine Isotopic Stage 5e or MIS 5e) had a mean global te...

At the left side of the Oued Tamri mouth, a palaeo sea-level (Unit 1) consists of marine and fluvio-marine deposits at ca. + 6 m a.s.l. The U/Th dating method applied to one marine shell of Patella sp. has yielded ages of 100,02 ± 1,662 ka and 101,188 ± 1,339 ka (MIS5.3) The overcoming dune (Sx) is dated at 84 ± 4 ka by OSL (MIS5.1). At Tighrine Im...

Saharan dust events are currently the predominant source of lithogenic particles in the Canary Basin. In order to quantify this input and its relationship with the biogenic fluxes, a sediment trap was deployed in a free-drifting system at 150 m depth, 50 km off the north coast of Gran Canaria (Canary Islands). The mineralogy of the lithogenic parti...

Volcanic oceanic islands are large buildings that grow from the ocean floor up to their highest peaks above sea level. It is estimated that only a small part of the volcanic edifices emerge above sea level, leaving almost 90% of the volcanic structure submerged. The geology of this submerged area is mainly known from indirect geophysical studies, g...

Lanzarote and Chinijo Islands are part of the Canary archipelago situated in the Atlantic Ocean and they have been included into the UNESCO Global Geopark network since 2015. The formation and evolution of Lanzarote and Chinijo Islands can be understood through the visit of 82 geosites, included in eight geological frameworks, which are representat...

Ten coastal dune series are described in the cliff section at Boughrara, and were deposited upon a MIS 5 basal paleo sea-level. All series are regressive eolianites more or less gresified by vadose calcitic cements. Serie SD6 is dated at 22 +/- 2 ka (OSL) and bears an Upper Paleolithic site. The three last coastal dune series contains Neolithic kjö...

Aeolian influx and related environmental conditions on Gran Canaria during the early Pleistocene – ERRATUM - Volume 91 Issue 1 - Inmaculada Menéndez, José Mangas, Esperança Tauler, Vidal Barrón, José Torrent, Juan F. Betancort, Ángelo Santana, José Manuel Recio, Luis A. Quevedo-González, Ignacio Alonso, Jorge Méndez-Ramos

Atlantic Morocco : post-MIS5 marine, aeolian and colluvial coastal sedimentations and tracks of Human settlement

Demonstrating the occurrence of three coastal dune systems at Boughrara : 1 - old (before MIS 5) system; 2 - middle (MIS 5 dunes system), like at Tamri; 3 - recent (rather MIS 4-3) system. Deduced geomorphological landscapes and human settlement implications

Two well-developed Late-Middle Pleistocene coastal dune systems accumulated under NNW dominant palaeowinds on the left side of wadi Tamri (30°42’N; 9°51’W, 50 km N from Agadir). The first system, with clear crossbed sets, consists of established coastal foredunes with coarse biodetritic sands. The second system, without internal structures, also co...

The island of Gran Canaria is regularly affected by dust falls due to its proximity to the Saharan desert. Climatic oscillations may affect the Saharan dust input to the island. Geochemical, mineralogical, and textural analysis was performed on a well-developed and representative early Pleistocene paleosol to examine Saharan dust contribution to Gr...

Trois unités successives de dunes littorales ont recouvert le paléorivage du MIS 5 à l'embouchure de l'oued Tamri, séparées par des colluvions et des paléosols qui recèlent des industries lithiques du Paléolithique moyen et supérieur. Ce dispositif permet de suivre les fluctuations de l'occupation humaine en fonction de celles du trait de côte dura...

La isla de La Graciosa está dentro del Parque Natural marítimo-terrestre del Archipiélago Chinijo y presenta varios ambientes sedimentarios arenosos, asociados a sistemas playa duna. El objetivo de esta investigación es determinar la composición de las arenas submareales, en el contexto de una investigación más amplia que pretende conocer las causa...

Beaches are highly valued by society, which explain their high occupancy worldwide. This demand has consequences in the economy, local politics and in the natural dynamic. The paradox is that geological-processes supporting numerous socio-ecological relationships on beaches, and they are no always consider. In this work the relationship between the...

The origin of intraplate carbonatitic to alkaline volcanism in Africa is controversial. A tectonic control, i.e., decompression melting associated with far-field stress, is suggested by correlation with lithospheric sutures, repeated magmatic cycles in the same areas over several million years, synchronicity across the plate, and lack of clear age...

Gran Canaria Island is frequently impacted by Saharan dust, a health hazard of particular concern to the island population and health agencies. Airborne mineral dust has the severest impact on the higher age groups of the population, and those with respiratory conditions; despite that, on average, the ambient particulate matter (PM) concentrations...

Chiva is a circular lagoon with a diameter of 900 m, located in the vicinity of the Catanda graben (An-gola). This area is largely covered by Quaternary lacustrine sediments, however, a few dykes of carbonatitic composition have been found near the SE shore of the lagoon. The intrusion of these carbonatitic dykes has been linked to the occurrence o...

Geochemical constraints on rare-earth element distribution of seamount-derived deposits from Amanay, Banquete and Conception Bank (Canary Islands). 2nd European Mineralogical Conference (September 11-15, 2016). Book of Abstracts, pp. 524. Rimini, Italy.

During the oceanographical cruises of the LIFE+ INDEMARES (2009-2013) project, samples of ferro-manganese crusts have been collected from Amanay, El Banquete and Conception Bank seamounts (Canary Islands). Petrography, mineralogy and geochemistry studies have been conducted in order to characterize geologically these deposits. Hereby we expose and...

This paper focuses on the study of the pre-Hispanic ceramics from the site of La Cerera (Gran Canaria) (7th century AD – 13th century AD). An integrated approach combining various levels of analysis has been carried out, employing morphological, technical and functional analysis of the pots, as well as their instrumental characterization: X-ray flu...

The Canary Islands and the Cape Verde Islands Volcanic Provinces show sets of islands and seamounts related to magma-driven processes over tens of millions of years at the Canary and Cape Verde hotspots. Continuous volcanism has been reported for the last 142 Ma on the Canaries and the last 26 Ma on the Cape Verde islands to these days. The oldest...

A set of small volcanic edifices with tuff ring and maar morphologies occur in the Catanda area, which is the only locality with extrusive carbonatites reported in Angola. Four outcrops of carbonatite lavas have been identified in this region and considering the mineralogical, textural and compositional features, we classify them as: silicocarbonat...

Geomorphology+ of+ the+ giant+ submarine+ landslides,+ submarine+ canyons,+ volcanic+ cones+ and+ salt+ diapirs+ that+ appear+ in+ the+ seabed+ surrounding+ the+ islands+of+Fuerteventura+and+Lanzarote+(Canary+Islands)

A leap in seamounts geo-characterization: using a multi-technical approach for origin, nature and evolution of Amanay, Banquete and Conception Bank (Canary Islands). LIFE+ INDEMARES (2009-2013). Book of Abstracts submitted to the IV Congress of Marine Sciences (June 11-13, 2014), pp. 204-205. Las Palmas de Gran Canaria, Spain.

Carbonatite lavas and pyroclastic rocks are exposed in the volcanic graben of Catanda and represent the only known example of extrusive carbonatites in Angola. A new detailed geological map of the area is presented in this study as well as six different stratigraphic sections. Pyroclastic rocks, apparently unwelded, are dominant in the area and rep...

Remains of highly eroded carbonatitic volcanic edifices occupy a region of 50 km 2 in the vicinity of the Catanda village, Kwanza Sul province, Angola. Carbonatitic lava flows and pyroclastic deposits are present in the area forming sequences of volcanic materials up to 600 metres in thickness. We have studied the composition of the melt inclusions...

Sedimentologic Characteristics of the Submarine Sediments associated to the Canarian Seamounts of Amanay, El Banquete and Conception Bank. MAKAVOL 2012 - 1st Anniversary International Conference commemorating the 2011-2012 El Hierro Submarine Eruption (October 10-15, 2012). Book of Abstracts, pp. 17-18.

Remains of carbonatitic volcanic buildings are located near the village of Catanda (Kwanza Sul, Angola). These volcanic carbonatites occupy an area of 50 Km2 forming small and eroded edifices mostly covered by quaternary sediments and hosted in Archaean granites. The age of the Catanda volcanic activity is not precisely calculated although Silva an...

Aeolian dust plays an important role in climate and ocean processes. Particularly, Saharan dust deposition is of importance in the Canary Current due to its content of iron minerals, which are fertilizers of the ocean. In this work, dust particles are characterized mainly by granulometry, morphometry and mineralogy, using image processing and scann...

The Canary Islands are close to the largest desert in the world, the Sahara, and as a result, the influence of air-transported dust in the area is of great significance. The present analysis consists of a study of two deposits in the NE and NW, respectively, of the island of Gran Canaria, considered as fluvio-lacustrine loessoids. They exhibit the...

The Pleistocene dune field of Tufia, located on the east of Gran Canaria (Spain), contains different stratigraphic levels of indurated pillar-like structures that are interpreted as megarhizoliths. The megarhizoliths occur at the top of different aeolian sets and reach 31.5 cm in diameter and over 1 m in height. These scattered, free-standing, vert...

Los niveles de eolianitas costeras de Tufia (Este de Gran Canaria) aparecen de forma dispersa en un área de 54,1 ha y presentan estratificaciones cruzadas de gran escala, bases erosivas, rizolitos y bandas con gasterópodos terrestres. Estos depósitos eólicos están constituidos por arenas de grano fino y, en menor medida, medio, y están entre bien y...

The island of Gran Canaria is located in the eastern Atlantic, to the west of the Saharan Desert, and, as a result of its proximity, is regularly affected by Saharan dust. When this weather condition occurs (haze conditions) the particulate/aerosol accumulation rate was lightly higher than under non-haze conditions (5.4±3.8 mg m−2 h−1 versus 4.3±2....

Se ha llevado a cabo una caracterización de los espacios interdunares del campo dunar de Maspalomas, destacando la presencia de un rango altitudinal de ~0.9 m entre ellos. Además, se definieron los diferentes patrones de flujo en los niveles freáticos en función de las condiciones meteorológicas. Antes de las lluvias, las líneas de flujo se orienta...

Hand-grindstones quarries at Gran Canaria. Anatomy of a special production centres». The manufacture of such specialized working tools as the circular grinding mills left a characteristic print in the pre European Grand Canary landscape, which has been ever lasted until nowadays. The quarries where their raw material was extracted modified the shel...

This research project intends a contribution in the definition of the social relationships of production in aboriginal society of Gran Canaria Island. We appeal to the analysis of one aspect of the production system, which material remains can be studied under different approaches with high efficiency in resolving similar problems in other contexts...

III RESUMEN Este trabajo tiene el objetivo de describir cómo se realizaban los trabajos de captación de la obsidiana en las minas de la Montaña de Hogarzales y cómo se preparaba la materia prima para enviarla a los centros receptores. Para ello se presenta el estudio morfotécnico de las evidencias líticas recuperadas en el sondeo arqueológico que s...

The studied beachrocks outcrop in the SW coast of La Palma island, between the village of Puerto Naos and the Fuencaliente lighthouse. They are rudstones and arenites cemented by several aragonitic and calcian magnesian cements. Elemental and isotopic geochemistry indicates precipitation from marine waters slightly modified by meteoric waters. The...

The Alcudia Valley is intensely mineralized, with a large number of Pb-Zn-Ag-Cu deposits hosted by Neo-proterozoic and Paleozoic sedimentary rocks. Five distinct types of deposits have been recognized. The most significant mineralizing events were related to the two major phases of deformation (H-D1, H- D2) and granite emplacement during the Hercyn...

Beachrocks on La Palma Island developed on platform-forming lavas of the Cumbre Vieja volcano. Some of these lavas are related to the 1585 (Puerto Naos), 1677 and 1971 (Echentive) eruptions. Radiocarbon dating of the Charco Verde beachrock gives a conventional age of 33 330±490 BP, while that at Playa Chica beach gives a calibrated age of 14 940±52...

In Galicia, in the northwestern part of the Iberian Peninsula, there are several occurrences of granitic pegmatites. One of the m, known as Franqueira, is a metasomatic deposit of gem-quality chrysoberyl, emerald and phenakite. The pegmatite is associated with a two-mica peraluminous Hercynian granite, and intrude dunites of the Schistose domain in...

Fluid inclusions have been studied in three pegmatite fields in Galicia, NW Iberian Peninsula. Based on microthermometry and Raman spectroscopy, eight fluid systems have been recognized. The first fluid may be considered to be a pegmatitic fluid which is represented by daughter mineral (silicates)-rich aqueous inclusions. These inclusions are prima...

The Zn-Pb deposits of the southeastern area of the Picos de Europa province display an epigenetic hydrothermal mineralization of moderate temperature hosted by intensely dolomitized limestones of Carboniferous age. They are structurally and lithologically controlled since the three phenomena of fracturing, dolomitization, and mineralization are int...