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
A promising target in the quest for a 1-million-year-old Antarctic ice core
24.05.2018 | University of Washington
Tropical Peat Swamps: Restoration of Endangered Carbon Reservoirs
24.05.2018 | Leibniz-Zentrum für Marine Tropenforschung (ZMT)
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences