Categorización de recursos minerales: análisis de variables y valores de corte.
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Date
2024
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Publisher
Universidad de Concepción
Abstract
La categorización de recursos minerales es una etapa crítica cuando se trata del estudio de un depósito. Dependiendo de todos los procesos anteriores a su realización, es la etapa encargada de la entrega de resultados relacionados con la calidad de la estimación realizada y de la confiabilidad de los recursos obtenidos. Es por ello que una completa metodología de análisis se hace necesaria.
Gracias a múltiples intentos en busca de estandarizar este proceso es que surge la creación del comité de estándares internacionales para reportar reservas minerales CRIRSCO. Los países miembros de este comité comenzaron a crear códigos internacionales en búsqueda del similar entendimiento entre países sobre los conceptos fundamentales al momento de categorizar y en cuanto a entrega de responsabilidades e información mínima a incluir en los informes sobre prospectos de exploración minera.
En la actualidad no existe un método estándar para definir categorías en cualquier tipo de depósito, sino que tanto los métodos para hacerlo como los parámetros o valores de corte utilizados varían de depósito en depósito y de persona en persona.
Mediante la comparación y análisis de métodos de categorización el objetivo de este trabajo es presentar en un caso real el comportamiento de las variables dentro de un depósito, aplicando a su vez diversos métodos de categorización. Esto es posible gracias a la revisión de informes técnicos de prospectos mineros en la base de datos SEDAR de la TSX (Toronto Stock Exchange) canadiense. De donde fueron extraídos los métodos más utilizados (así como también los valores de corte) al momento de categorizar recursos en la industria por parte de las personas competentes responsables de la redacción y firma de dichos informes.
Finalmente, existe un sinfín de métodos de categorización cada uno de los cuales está enfocado en distintas variables para lograr su cometido. El análisis de variables realizado lleva a definir como más confiables los sectores mayormente muestreados, dependiendo de la persona que realice el análisis de confiabilidad de los recursos en un depósito las cantidades de recursos asignados en cada una de las categorías. La calidad al momento de la definición de valores de corte para cada una de las variables presentes en el proceso de categorización tiene alta dependencia de la experiencia del profesional encargado del análisis del depósito, así como también la certeza del proceso de categorización.
Categorization of mineral resources is a critical stage when it comes to the study of a deposit. Depending on all the processes prior to its completion, it is the stage in charge of delivering results related to the quality of the estimate made and the reliability of the resources obtained. This is why a complete analysis methodology is necessary. Thanks to multiple attempts to standardize this process, the creation of the international standards committee for reporting mineral reserves CRIRSCO emerged. The member countries of this committee began to create international codes in search of similar understanding between countries on the fundamental concepts when categorizing and regarding the delivery of responsibilities and minimum information to be included in reports on mining exploration prospects. Currently there is no standard method for defining categories in any type of deposit, but both the methods for doing so and the parameters or cut-off values used vary from deposit to deposit and from person to person. Through the comparison and analysis of categorization methods, the objective of this work is to present in a real case the behavior of the variables within a deposit, applying various categorization methods. This is possible thanks to the review of technical reports of mining prospects in the SEDAR database of the Canadian TSX (Toronto Stock Exchange). From where the most used methods (as well as the cut-off values) were extracted when categorizing resources in the industry by the competent people responsible for writing and signing said reports. Finally, there are endless categorization methods, each of which is focused on different variables to achieve its goal. The analysis of variables carried out leads to defining the most sampled sectors as more reliable, depending on the person who performs the reliability analysis of the resources in a deposit, the amounts of resources assigned in each of the categories. The quality at the time of defining cut-off values for each of the variables present in the categorization process is highly dependent on the experience of the professional in charge of analyzing the deposit, as well as the certainty of the categorization process.
Categorization of mineral resources is a critical stage when it comes to the study of a deposit. Depending on all the processes prior to its completion, it is the stage in charge of delivering results related to the quality of the estimate made and the reliability of the resources obtained. This is why a complete analysis methodology is necessary. Thanks to multiple attempts to standardize this process, the creation of the international standards committee for reporting mineral reserves CRIRSCO emerged. The member countries of this committee began to create international codes in search of similar understanding between countries on the fundamental concepts when categorizing and regarding the delivery of responsibilities and minimum information to be included in reports on mining exploration prospects. Currently there is no standard method for defining categories in any type of deposit, but both the methods for doing so and the parameters or cut-off values used vary from deposit to deposit and from person to person. Through the comparison and analysis of categorization methods, the objective of this work is to present in a real case the behavior of the variables within a deposit, applying various categorization methods. This is possible thanks to the review of technical reports of mining prospects in the SEDAR database of the Canadian TSX (Toronto Stock Exchange). From where the most used methods (as well as the cut-off values) were extracted when categorizing resources in the industry by the competent people responsible for writing and signing said reports. Finally, there are endless categorization methods, each of which is focused on different variables to achieve its goal. The analysis of variables carried out leads to defining the most sampled sectors as more reliable, depending on the person who performs the reliability analysis of the resources in a deposit, the amounts of resources assigned in each of the categories. The quality at the time of defining cut-off values for each of the variables present in the categorization process is highly dependent on the experience of the professional in charge of analyzing the deposit, as well as the certainty of the categorization process.
Description
Tesis para optar al título profesional de Ingeniero Civil en Minas
Keywords
Recursos minerales, Geología