Added to other techniques in the arsenal of Geochemistry and mineralogy like chemical analysis and X-rays, and with the added advantage of them being cheap, fast and non-destructive methods, a great precision is achieved.
This statement has been described in the research work titled “Aplicación conjunta de técnicas geofísicas, mineralógicas y geoquímicas para la caracterización geoambiental de balsas de lodos mineros” (Combined application of geophysic, mineralogical, and geochemical techniques for the geoambiental characterisation of mining mud ponds) and is directed by the geology professor Tomás Martín Crespo from the Rey Juan Carlos University (URJC).
The south of Spain alone has over 80 metal mines, some still active and some already inactive. The abandoned storage ponds are made up of grain sized materials, ranging from medium to fine, that contain sulphides of low economical importance and a small proportion of waste metal that failed to be extracted. They represent an environmental issue, being a source of acidic mine drainage and heavy metals. It is crucial that all the storage ponds are evaluated and characterised prior to the natural restoration work of the mining fields.
The researchers at the URJC have focused on two particular mining fields (Monte Romero and Río Tinto) both in the Spanish province of Huelva, where the new geophysical techniques have provided excellent results. The electrical resistivity tomography worked particularly well, not only determining the precise geometry of the storage pool thanks to the high electrical resistivity contrast among the tailings and the bottom of the pool but also determining the different deposited layers and their heterogeneity. It even succeeded in differentiating the flows of groundwater inside the pool by the low resistivity of water.
The ground penetrating radar is very helpful in determining the characteristics and geometry of the sides and surface of the pool, detecting changes in humidity, but being more limited than the tomography because of the high attenuation effect that the tailings and the water in the pool have.
Gabinete de prensa | alfa
Welcome Committee for Comets
19.07.2019 | Technische Universität Braunschweig
Sea level rise: West Antarctic ice collapse may be prevented by snowing ocean water onto it
18.07.2019 | Potsdam-Institut für Klimafolgenforschung
Adjusting the thermal conductivity of materials is one of the challenges nanoscience is currently facing. Together with colleagues from the Netherlands and Spain, researchers from the University of Basel have shown that the atomic vibrations that determine heat generation in nanowires can be controlled through the arrangement of atoms alone. The scientists will publish the results shortly in the journal Nano Letters.
In the electronics and computer industry, components are becoming ever smaller and more powerful. However, there are problems with the heat generation. It is...
Scientists have visualised the electronic structure in a microelectronic device for the first time, opening up opportunities for finely-tuned high performance electronic devices.
Physicists from the University of Warwick and the University of Washington have developed a technique to measure the energy and momentum of electrons in...
Scientists at the University Würzburg and University Hospital of Würzburg found that megakaryocytes act as “bouncers” and thus modulate bone marrow niche properties and cell migration dynamics. The study was published in July in the Journal “Haematologica”.
Hematopoiesis is the process of forming blood cells, which occurs predominantly in the bone marrow. The bone marrow produces all types of blood cells: red...
For some phenomena in quantum many-body physics several competing theories exist. But which of them describes a quantum phenomenon best? A team of researchers from the Technical University of Munich (TUM) and Harvard University in the United States has now successfully deployed artificial neural networks for image analysis of quantum systems.
Is that a dog or a cat? Such a classification is a prime example of machine learning: artificial neural networks can be trained to analyze images by looking...
An international research group led by scientists from the University of Bayreuth has produced a previously unknown material: Rhenium nitride pernitride. Thanks to combining properties that were previously considered incompatible, it looks set to become highly attractive for technological applications. Indeed, it is a super-hard metallic conductor that can withstand extremely high pressures like a diamond. A process now developed in Bayreuth opens up the possibility of producing rhenium nitride pernitride and other technologically interesting materials in sufficiently large quantity for their properties characterisation. The new findings are presented in "Nature Communications".
The possibility of finding a compound that was metallically conductive, super-hard, and ultra-incompressible was long considered unlikely in science. It was...
24.06.2019 | Event News
29.04.2019 | Event News
17.04.2019 | Event News
19.07.2019 | Physics and Astronomy
19.07.2019 | Physics and Astronomy
19.07.2019 | Earth Sciences