Correlación de la respuesta gamma espectrométrica con la litología y la alteración hidrotermal, en el pozo CSD-18-068 del pórfido Alpala - Proyecto Cascabel, Provincia Imbabura, Ecuador
Fecha
2019
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
En la presente investigación se realizó, el análisis gammaespectrométrico en el área
de trabajo asignada por Exploraciones Novomining S.A, (ENSA). La concesión minera
Cascabel (50km2) se encuentra situada en la provincia de Imbabura, cantón Ibarra,
parroquias Lita y La Carolina. Se halla emplazada sobre la Cordillera Occidental,
aproximadamente a 120 Km al Norte de Quito, capital de Ecuador y 20 Km al Sur del
límite territorial con Colombia.
Se realizó el presente trabajo con el objetivo de establecer la metodología adecuada,
para la implementación del método gammaespectrometríco, que mide la radiación
natural de las rocas producido en el proceso de decaimiento radiactivo que ocurre
naturalmente en los minerales que forman la roca. El mismo que permitió obtener
resultados confiables en base a la detección de minerales de arcilla presentes en las
alteraciones hidrotermales en testigos de perforación del pozo CSD-18-068 que tiene
una profundidad de 1668.40 metros, con las lecturas de los radioelementos K, U y Th,
y su correlación con la química de laboratorio ICP (Inductively Coupled Plasma
Analysis), la validación de esta técnica aprobó la metodología que se utilizó en el
registro de los núcleos de roca, conjuntamente se demostró que el método
gammaespectrométrico puede diferenciar contactos litológicos y ser un recurso optimo
en la evaluación preliminar de los resultados de perforación en el pórfido de Alpala.
In the present investigation, the gamma-spectrometric analysis was performed in the work area assigned by Explorations Novomining S.A, (ENSA). The Cascabel mining concession (50km2) is located in the province of Imbabura, Ibarra canton, Lita and La Carolina parishes. It is located on the Western Cordillera, approximately 120 km north of Quito, capital of Ecuador and 20 km south of the territorial border with Colombia. The present work was carried out with the objective of establishing the appropriate methodology, for the implementation of the gamma-spectrometric method, which measures the natural radiation of the rocks produced in the process of radioactive decay that occurs naturally in the minerals that form the rock. The same that allowed to obtain reliable results based on the detection of clay minerals present in hydrothermal alterations in drilling witnesses of the CSD-18-068 well that has a depth of 1668.40 meters, with the readings of radioelements K, U and Th, and its correlation with the laboratory chemistry ICP (Inductively Coupled Plasma Analysis), the validation of this technique approved the methodology that was used in the registration of rock nuclei, together it was demonstrated that the Gamma-spectrometric method can differentiate lithological contacts and be an optimal resource in the preliminary evaluation of drilling results in the Alpala porphyry.
In the present investigation, the gamma-spectrometric analysis was performed in the work area assigned by Explorations Novomining S.A, (ENSA). The Cascabel mining concession (50km2) is located in the province of Imbabura, Ibarra canton, Lita and La Carolina parishes. It is located on the Western Cordillera, approximately 120 km north of Quito, capital of Ecuador and 20 km south of the territorial border with Colombia. The present work was carried out with the objective of establishing the appropriate methodology, for the implementation of the gamma-spectrometric method, which measures the natural radiation of the rocks produced in the process of radioactive decay that occurs naturally in the minerals that form the rock. The same that allowed to obtain reliable results based on the detection of clay minerals present in hydrothermal alterations in drilling witnesses of the CSD-18-068 well that has a depth of 1668.40 meters, with the readings of radioelements K, U and Th, and its correlation with the laboratory chemistry ICP (Inductively Coupled Plasma Analysis), the validation of this technique approved the methodology that was used in the registration of rock nuclei, together it was demonstrated that the Gamma-spectrometric method can differentiate lithological contacts and be an optimal resource in the preliminary evaluation of drilling results in the Alpala porphyry.
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GAMMAESPECTROMETRÍCO, RADIACIÓN, MINERALES, ARCILLAS, RADIOELEMENTOS