A5024910309- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological and Geophysical Studies Worldwide
- Polar Research and Ecology
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- High-pressure geophysics and materials
- Mine drainage and remediation techniques
- Mining and Resource Management
- Archaeological and Geological Studies
- Archaeology and ancient environmental studies
- Cryospheric studies and observations
- Metal Extraction and Bioleaching
- Geochemistry and Elemental Analysis
- Astro and Planetary Science
- Space Exploration and Technology
- Environmental and Cultural Studies in Latin America and Beyond
- Marine Biology and Ecology Research
- Building materials and conservation
- Geological and Tectonic Studies in Latin America
- Heavy metals in environment
- Geological Modeling and Analysis
- Geomagnetism and Paleomagnetism Studies
- Coal and Its By-products
Universidad de Salamanca
2015-2024
Universidad Complutense de Madrid
2019
Institute of Mineralogy
2019
Massachusetts Institute of Technology
2014
Instituto Andaluz de Ciencias de la Tierra
2008-2010
Universidad de Granada
2004-2010
Naturalis Biodiversity Center
2009-2010
Consejo Superior de Investigaciones Científicas
2010
Universidad de Huelva
2007-2009
University of Padua
2005-2007
Plant material culture can offer unique insights into the ways of life prehistoric societies; however, its perishable nature has prevented a thorough understanding diverse and complex uses. Sites with exceptional preservation organic materials provide opportunity for further research. The burial site Cueva de los Murciélagos in southern Iberia, uncovered during 19th-century mining activities, contained best-preserved hunter-gatherer basketry Europe, together other artifacts associated first...
Abstract The caldera collapse of Deception Island Volcano, Antarctica, was comparable in scale to some the largest eruptions on Earth over last several millennia. Despite its magnitude and potential for far-reaching environmental effects, age this event has never been established, with estimates ranging from late Pleistocene 3370 years before present. Here we analyse nearby lake sediments which identify a singular produced by Island’s that occurred 3980 ± 125 calibrated erupted tephra record...
Abstract Deception Island (South Shetland Islands) is one of the most active volcanoes in Antarctica, with more than 20 explosive eruptive events registered over past two centuries. Recent eruptions (1967, 1969, and 1970) volcanic unrest episodes that happened 1992, 1999, 2014–2015 demonstrate occurrence future activity a valid pressing concern for scientists, technical logistic personnel, tourists, are visiting or working on near island. We present unifying evolutionary model magmatic...
Abstract Spinel + cordierite K‐feldspar plagioclase glass form coronas around garnet in metapelitic xenoliths at El Hoyazo and Mazarrón, two localities of the Neogene Volcanic Province (NVP) SE Spain. The presence fresh (quenched melt) all phases shows that corona development occurred under partial melting conditions. Algebraic analysis mass balance NCKFMASH system suggests reaction Grt Sil Bt Pl = Spl Crd Kfs melt as most plausible model for sample, indicates biotite was required reactant...
Crustal xenoliths from the Neogene Volcanic Province (NVP) of Betic Cordillera, SE Spain, constitute an unusual suite high-grade melt-bearing metapelitic rocks derived in two stages metasediments surrounding crustal magma chambers. Microstructures and age relationships indicate that a first stage migmatization melt extraction was overprinted by sequence reaction microstructures. The preservation as glass requires only short residence time before eruption host melt. P–T conditions melting...
The analysis of fault-related mineralization and, particularly, in the Fluid Inclusions (FIs) entrapped synkinematic minerals are key to assess origin and modalities fluid circulation through fault zones. results these analyses, compared with those focusing on present-day fluids, crucial better understanding processes regulating both paleo modern degassing from Earth’s interior seismicity crustal deformation. In particular, focus is role that deep fluids might have deformation over...
Deception Island, the most active volcanic system in South Shetland Islands (Antarctica), has recorded over 20 explosive monogenetic eruptions past two centuries. The island’s recent eruption 1970 was one of its violent, with a Volcanic Explosivity Index (VEI) 3. This event generated column height up to 10 km and produced an estimated bulk eruptive volume exceeding 0.1 km³, tephra fallout 150 away on King George Island. To investigate magmatic processes leading this...
Megaliths represent the earliest form of monumental stone architecture. The megalithic chambers in Europe appeared France fifth millennium BCE. Menga is oldest great dolmens Iberia (approximately 3800 to 3600 BCE). Menga's capstone #5 weighing 150 tons largest ever moved as part phenomenon and one Europe. research presented here proposes a completely innovative interpretation how this colossal monument was built. It comprises geoarchaeological analysis encompassing three major components:...
Abstract Three metapelitic xenolith suites in the Neogene Volcanic Province (NVP) of SE Spain (from SW to NE: El Hoyazo, Mazarrón and Mar Menor) originated by partial melting at different crustal depths, decreasing from 20–25 km 9–12 NE. Peak temperatures reached c. 900 °C. The source level is equated with base a felsic upper crust high potential (‘fertility’). At this matches thin, intracrustal low‐velocity zone recently inferred seismic studies. Isostatic calculations indicate that...
Research Article| November 01, 2014 Crustal attenuation as a tracer for the emplacement of Beni Bousera ultramafic massif (Betico-Rifean belt) Antonio M. Álvarez-Valero; Álvarez-Valero 1Department Earth, Atmospheric and Planetary Sciences, Massachusetts Institute Technology, Cambridge, 02139, USA †Current address: Departamento de Geología, Universidad Salamanca, 37008 Spain; aav@usal.es. Search other works by this author on: GSW Google Scholar Oliver Jagoutz; Jagoutz Jessica Stanley; Stanley...
In the present study, experiments in non-saturated leaching columns were conducted to characterize neoformed phases that precipitate at interface between two waste residues having different chemical characteristics: an acid mine drainage producer residue (i.e., pyritic sludge) and acidity neutralizer coal combustion fly ash). A heating source was placed on top of one accelerate oxidation precipitation newly formed phases, thus, observe longer-scale processes. When both are deposited...
This work presents a comparative study of Roman and modern slags, which represent the same type mining waste but were produced at vastly different times. The natural laboratory in both materials are found is São Domingos, one most emblematic Portuguese districts Iberian Pyrite Belt (IPB). methodology included: (1) detailed studies mineralogy geochemistry with reflected-light optical microscope, scanning electron microscope (SEM), microprobe analyses (EMPA), bulk-rock analyses; (2) MELTS...
Abstract Deception Island (South Shetland Islands) is one of the most active volcanoes in Antarctica, with more than 15 explosive eruptive events registered over past two centuries. Recent eruptions (1967, 1969 and 1970) volcanic unrest episodes 1992, 1999 2014–15 demonstrate that occurrence future activity a valid pressing concern for scientists, logistic personnel tourists are visiting or working on near island. Over last few decades, intense research has been carried out to decipher...
Abstract Aiming at understanding the source of fluids that mineralizing within seismically active fault zones, we investigate noble gas isotopes (i.e., helium (He), neon (Ne), and argon (Ar)) in fluid inclusions (FIs) trapped calcite veins sampled along high‐angle zones Contursi hydrothermal basin, southern Italy. The latter basin lies close vicinity M W = 6.9, 1980 Irpinia earthquake exposes numerous scarps dissecting Mesozoic shallow‐water carbonates. analyses gases (He, Ne, Ar) are...
Abstract Metapelitic residual enclaves in the Neogene Volcanic Province of SE Spain are residues left after melt extraction. Glass (quenched melt) granitic composition occurs as inclusions most minerals and intergranular pockets. The common enclave types show one stage garnet growth that is interpreted to have occurred at same time glass production. Some these a well‐developed foliation outlined by fibrolite, biotite, graphite glass, which wraps around elongate crystals aspect ratios up...