Cartografía geólogo-estructural y litológica a partir de datos geofísicos del área de Rodas-Fomento (Cuba central)
No Thumbnail Available
Date
Advisors
Evaluators
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad Industrial de Santander
Abstract
Description
Disímiles han sido los trabajos geológicos que se han realizado en la región de Rodas-Fomento enfocado hacia la prospección de minerales, sin embargo, no se ha realizado la cartografía estructuro-tectónica y litológica a partir del uso de datos geofísicos, a fin de fundamentar los trabajos de reconocimiento propuestos para los sectores más favorables de localizar mineralización. Por tales razones los objetivos de la presente investigación fueron la realización de la cartografía estructuro-tectónica-litológica y geológica de la región a partir de la interpretación integrada de datos geofísicos (gravimétrico, aeromagnético, y de espectrometría gamma aérea). La interpretación de los diferentes canales de espectrometría gamma aérea permitió concluir que: los mayores valores de uranio se observan en formaciones geológicas con altos contenidos de grafito (materia orgánica); todas las rocas metamórficas poseen valores elevados de torio y; los valores mayores de potasio se vinculan a las granodioritas, las brechas magmáticas, así como a las rocas ácidas de la Formación La Bruja correspondiente al Cretácico superior cenomaniense. A partir de la interpretación del mapa ternario y las combinaciones de los radioelementos, se identificaron con mayor precisión las principales unidades litológicas y su naturaleza en el área. Como resultado final, se confeccionó un mapa con la interpretación integrada de todos los datos geofísicos que permitirá realizar la etapa de exploración en los sectores más favorables de localizar mineralización sulfurosa de metales base y preciosos (Cu - Pb - Zn ± Au, Ag).
The geological works that have been carried out in the Rhodes-Fomento region focused on mineral prospecting have been different, however, the structural-tectonic and lithological cartography has not been realized from the use of geophysical data, in order to substantiate the reconnaissance works proposed for the most favorable sectors to locate mineralization. For these reasons, the objectives of the present investigation were the realization of the structural-tectonic-lithological and geological cartography of the region based on the integrated interpretation of geophysical data (gravimetric, aeromagnetic, and aerial gamma spectrometry). The interpretation of the different channels of aerial gamma spectrometry allowed to conclude that: the highest values of uranium are observed in geological formations with high contents of graphite (organic matter); all metamorphic rocks have high values of thorium and; the highest values of potassium are linked to the granodiorites, the magmatic breaches, as well as to the acid rocks of the La Bruja Formation corresponding to the Cenomanian Upper Cretaceous. From the interpretation of the ternary map and the combinations of radioelements, the main lithological units and their nature in the area were identified with greater precision. As a final result, a map was prepared with the integrated interpretation of all the geophysical data that will make it possible to carry out the exploration stage in the most favorable sectors of locating sulphide mineralization of base and precious metals (Cu - Pb - Zn ± Au, Ag).
The geological works that have been carried out in the Rhodes-Fomento region focused on mineral prospecting have been different, however, the structural-tectonic and lithological cartography has not been realized from the use of geophysical data, in order to substantiate the reconnaissance works proposed for the most favorable sectors to locate mineralization. For these reasons, the objectives of the present investigation were the realization of the structural-tectonic-lithological and geological cartography of the region based on the integrated interpretation of geophysical data (gravimetric, aeromagnetic, and aerial gamma spectrometry). The interpretation of the different channels of aerial gamma spectrometry allowed to conclude that: the highest values of uranium are observed in geological formations with high contents of graphite (organic matter); all metamorphic rocks have high values of thorium and; the highest values of potassium are linked to the granodiorites, the magmatic breaches, as well as to the acid rocks of the La Bruja Formation corresponding to the Cenomanian Upper Cretaceous. From the interpretation of the ternary map and the combinations of radioelements, the main lithological units and their nature in the area were identified with greater precision. As a final result, a map was prepared with the integrated interpretation of all the geophysical data that will make it possible to carry out the exploration stage in the most favorable sectors of locating sulphide mineralization of base and precious metals (Cu - Pb - Zn ± Au, Ag).
Keywords
Structure-tectonic mapping, lithological mapping, potential fields, airborne gamma spectrometry, integrated interpretation, Cartografía estructuro-tectónica, cartografía litológica, campos potenciales, espectrometría gamma aérea, interpretación integrada