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PRELIMINARY RESULTS OF ELECTRICAL RESISTIVITY FOR SUBSOIL ENVIRONMENTAL ASSESSMENT OF THE ALIJO LITHIUM RICH PEGMATITE QUARRY, BARROSO, PORTUGAL
Abstract
In recent years, with the rise of a growing economic and technological interest in lithium mineral resources, there has been a parallel concern, on the part of some local populations and even national environmental groups, for a hypothetical contamination problem that this type of exploitations may cause on the quality of groundwater. Thus, the present study was based on an evaluation of an open-pit quarry, in the socalled Alijo quarry, located in the North of Portugal, in the parish of Canedo, Ribeira de Pena municipality and Vila Real district. This exploitation, under concession by the company Jose Aldeia Lagoa & Filhos, SA, has been going on for at least 11 years and mainly supplies the ceramic and glass industry. It is in this context that this work is carried out. The general objectives are to assess signs of impacts that extractive activities, carried out in the open-pit exploitation area of Alijo, may have caused on the surrounding subsoil. In this sense, it was necessary to consider the aforementioned hypothesis of the existence of possible sources of water drainage with ionic anomalies for the surrounding environment. If this hypothesis were confirmed, then the level of underground conductivity would have to be proportionally high and obtainable through equivalent low values of electrical resistivity (high electrical conductivity). The current study was limited to geophysical tools along with a few chemical analysis of water samples collected in the open-pit exploration for control purposes. The signs we sought for could possibly be manifested in the form of anomalous concentrations of some of the elements of the mineralization of this lithiniferous pegmatite and whose effects could, hypothetically, be measured in the form of anomalous low values of underground electrical resistivity, as well as anomalous pH valuespresent in the drainage water. To this end, a study mainly supported by the electrical resistivity method was carried out. This method is based on the measurement of electrical resistivity variations of different subsoil geological materials, since rocks and soils, depending on their mineralogical composition, texture, porosity, fracturing and the content/chemical composition of the water contained in them, could exhibit anomalous, low electrical resistivity. The results revealed that no low resistivity values were found, typical of areas that normally exhibit natural or anthropogenic geochemical anomalies, or even, in more extreme cases, contaminations with acid drainages whose acidity and resistivity would be even lower and more anomalous.
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Oliveira, J. M. S. (1997). Algumas Reflexoes com enfoque na problematica dos riscos ambientais associados a actividade mineira. Estudos, Notas e Trabalhos, Tomo 39. Instituto Geologico e Mineiro;
Reis, A.P.; Patinha, C.; Noack, Y.; Robert, S.; Dias, A.C.; Ferreira da Silva, E.. "Assessing the human health risk for aluminium, zinc and lead in outdoor dusts collected in recreational sites used by children at an industrial area in the western part of the Bassin Minier de Provence, France". Journal of African Earth Sciences, Volume 99, Part 2, November 2014, pp 724-734; DOI: 10.1016/j.jafrearsci.2013.08.001
Ramalho, E. C., Senos Matias, M. J., Marques Moura, R. M., (2015), Surface Geophysical Methods in the Assessment of Environmental Impacts of Landfills: An Overview, Environmental Research Journal . 2015, Vol. 9 Issue 2, p179-206. 28p;
Martinez-Pagan, P., Faz Cano, A., Aracil, E., and Arocena, J. M., (2009). Electrical Resistivity Imaging Revealed the Spatial Properties of Mine Tailing Ponds in the Sierra Minera of Southeast Spain, Journal of Environmental & Engineering Geophysics 14(2) pp 63-76; DOI: 10.2113/jeeg14.2.63
Fontoura, M. J., Moura, R. M., Dias, A. G., (2011). A Geologia e a Geofisica na avaliacao da contaminacao associada a vazadouros controlados - o caso do VC de Matosinhos no Norte de Portugal. Comunicacoes Geologicas. 98, 83-92. Laboratorio Nacional de Geologia e Energia IP;
Martins, T., Lima, A., Simmons, W.B., Falster, A.U., Noronha F., Geochemical fractionation of Nb�Ta oxides in Li-bearing pegmatites from the Barroso�Alvao pegmatite field, Northern Portugal, The Canadian Mineralogist, 49 (3), 2011, 777-791 DOI: 10.3749/canmin.49.3.777
Lima, A. (2000). Estrutura, Mineralogia e Genese dos Filoes Aplitopegmatiticos com Espodumena da Regiao do Barroso-Alvao. Ph. D. thesis in Sciences (Geologia).Faculty of Sciences of University of Porto. Port;.
Loke, M.H. (2004). Tutorial: 2-D and 3-D Electrical Imaging Surveys. Geotomo Software, Res2dinv 3.5 Software;
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