Pablo Caldevilla

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Verified

Pablo verified their affiliation via an institutional email.

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• PhD
• Professor (Assistant) at University of Leon

The Truchas Syncline contains orogenic gold deposits (OGDs), hosted mainly by the Armorican Quartzite Fm. In order to look for the source of gold in these deposits, pre-kinematic sulphides from black shales from the overlying Luarca Fm. were studied using both optical and scanning electron (SEM) microscopy, as well as nanoscale secondary ion mass s...

Concern for the perpetuation of stone monuments is deeply ingrained in humans; however, despite the attempts made in this field, there is still a great deal of effort needed to bring about advancements in the conservation of ornamental stone. Erosive agents, such as rain, extreme temperatures, and chemical and biological agents, threaten our stone...

The management of a UNESCO Global Geopark (UGGp) requires a vast wealth of miscellaneous scientific knowledge that can be successfully organised using a Geographical Information System (GIS). This paper presents a pragmatic GIS database to assist in the suitable governance of the Courel Mountains UGGp (2017) in Northwest Spain. The database is stru...

This study offers a detailed assessment of the geosites and mining sites present in the Zaruma-Portovelo mining district (Ecuador) through their qualitative and quantitative assessment. It shows up the potentiality of this area taking advantage of its geological-mining heritage. The methodological process includes: (i) compilation and inventory of...

In the northwestern (NW) Iberian Peninsula (NW Gondwana) Ordovician black-grey shales and sandstones were deposited on marine platforms at southern polar latitudes. Provenance, recycling, weathering and redox geochemical proxies were derived from the bulk rock composition of siliciclastic rocks recovered from northwest Spain. Statistically signific...

Gondwana developed marine platforms at its northern edge with Paleozoic deposits reflecting varied paleoclimatic conditions. In the northwestern (NW) Iberian Peninsula (NW Gondwana), Ordovician black-grey shales and sandstones were deposited in these platforms at southern polar latitudes. The current research contributes to a better understanding o...

En este trabajo se investiga la distribución de tierras raras (REE), elementos críticos de interés económico, en minerales accesorios de Pizarras Ordovícicas del Sinclinal de Truchas (Fm. Luarca, Zona Centro-Ibérica, León). Estas pizarras están formadas por cuarzo, moscovita y clorita (± albita) y minerales accesorios diversos: monacita (en parte s...

The Cadafresnas granites and granitoid breccias (Peña do Seo, W of León) are small post-tectonic stocks of Variscan age related to W-Sn mineralizations. According to their mineralogical geochemical characteristics, they are classified as granites-syenogranites, granodiorites and granitoids rich in quartz, of peraluminous/metaluminous composition. T...

The Courel Mountains UNESCO Global Geopark (2019) stands out in SW of Europe because of its geoheritage, its biodiversity and its cultural heritage, all of it considered of international interest. These aspects shape the local development economic and cultural improvement and development. The geoheritage is the result of three geological cycles sin...

In recent decades, interest in maintaining and conserving cultural assets has grown and there has been greater investment in the conservation of historical heritage. Developing a good methodology for action is key to guaranteeing adequate preservation of cultural assets. With this in mind, the Spanish Historical Heritage Institute convened a confer...

Acid rain is a problem that despite efforts to reduce atmospheric pollution, continues to impact not only countries where there is a high production of pollutants, but also transboundary areas to which the pollutants are transported. In addition to its effects on human health, there are also the effects on infrastructure and the consequences that t...

Karst aquifers and, especially, their caves and springs, are singular sites of the geoheritage due to their scientific, touristic and use (water resources) values. Besides, they are recognized as habitats of special protection by the Habitat Directive (92/43/CEE) and would be used for sustainable development in UNESCO Global Geoparks (UGGp). Howeve...

The importance of understanding the effects of rainfall on different materials over time makes it essential to carry out controlled tests to reduce analysis time. Rainfall simulators have been in use for decades and have been implemented as technology and knowledge of the physical behavior of water advanced. There are two main types of rainfall sim...

The use of stone in traditional architecture represents one of the most relevant links between geological and cultural heritage. As a topic of general interest and easily understandable to all public, this link is a guiding thread for touristic routes mitigating the depopulation trend that affects large inland rural areas, including many areas in U...

Ordovician volcanic rocks outcrop in several locations of the NW Iberian Variscan belt. Their composition is mainly basaltic (with less acid types) and occur as volcanic-volcanoclastic layers within a shale-slate succession. This work focuses on volcanic and related rocks within a prominent Variscan structure, the Truchas Syncline. We studied field...

Microbial mats are organo-sedimentary deposits formed by bacteria that trap or synthesize certain chemical elements. This type of activity gives rise to the formation of lamellar and/or columnar bioconstructions (stromatolites) and/or concentric structures (on-colites and thrombolites). The study of microbial mats used to be restricted mainly to ma...

Santa Elena Peninsula is characterized by beautiful geological features, historical geoscientific knowledge, and mineral and tourism resources that could all be combined for the sake of community development. This article provides an overview of the Santa Elena Peninsula Geopark Project through the assessment of six areas that are considered by inh...

Stone used in historical monuments and traditional constructions represent one of the most relevant links between geoheritage and cultural heritage, since specific rocks were widely used by the First civilizations. Throughout the history, different stones have been quarried according to their availability and geological properties, linked to the ge...

The source of Au and S of the orogenic gold deposits in the Llamas de Cabrera District (Iberian Variscan Massif)

Using optical scanning electron microscopy, electron microprobe and sulphur isotopic analysis, pyrite and graphite in black slates and volcanic rocks from Luarca formation were studied. Four types of pyrite are present in the black slates. In ascending order according to their evolutionary degree: framboidal, framboidal evolved, subhedral macroscop...

Peña do Seo W-Sn vein-type deposit lies in the West Asturian-Leonese zone, part of the Variscan Massif. Total metal reserves were 1.35 Mt, with average grades of 0,25 % WO 3 and 0,05% SnO 2. Mineralization is found within Qz veins hosted by Precambrian schists from Villalba Formation. Mineralization is mainly constituted by wolframite, cassiterite,...

Peña do Seo W-Sn vein-type deposit lies in the West Asturian-Leonese zone, part of the Variscan Massif. Total metal reserves were 1.35 Mt, with average grades of 0,25 % WO 3 and 0,05% SnO 2. Mineralization is found within Qz veins hosted by Precambrian schists from Villalba Formation. Mineralization is mainly constituted by wolframite, cassiterite,...

coverages, including topographic, environmental, geological, archaeological, and ethnographic values, but also available accommodation and catering facilities, recreational and didactic infrastructures, as well as four raster coverages to integrate the relief variables. Thematic maps have been made using the database to highlight the geological val...

The focus of this research is to develop a qualitative and quantitative assessment of the geosites and mining sites present in the Zaruma Portovelo mining district (Ecuador). This work's methodology can be summarized as follows: i) compilation and inventory of all the sites within the study area with particular geological or mining interest; ii) as...

Ordovician volcanic rocks outcrop in several locations of the NW Iberian Variscan belt. Composition is bimodal (basalts and rhyolites) and they occur as volcanic-volcanoclastic deposits within shale formations. This work focuses on the basaltic rocks (near to Cunas village) which outcrop within a prominent Variscan structure, the Truchas Syncline....

The focus of this research is to develop a qualitative and quantitative assessment of the geosites and mining sites present in the Zaruma Portovelo mining district (Ecuador). This work's methodology can be summarized as follows: i) compilation and inventory of all the sites within the study area with particular geological or mining interest; ii) as...

Este trabajo estudia la parte superior de la Formación Barcaliente, donde se concentran abundantes moldes de evaporitas, y comienza la Brecha del Porma. Mediante el levantamiento de una sección estratigráfica y el estudio de 42 láminas delgadas, se obtienen argumentos objetivos que permiten inferir cómo se produjeron los cambios en las condiciones...