GeneralesNoviembre2020

23 DE JUNIO 2021 – 7:00 pm

Miércoles Geológico 23 de junio
 
Ingreso libre vía zoom https://zoom.us/j/93273290212

EXPLORACIÓN IN-FIELD DE CO, AU, AG, RE Y ETR EN PÓRFIDOS CUPRÍFEROS: IMPLICANCIAS EN LA TRANSFORMACIÓN DEL NEGOCIO MINERO DEL FUTURO

Ing, GERMAN VELASQUEZ ACOSTA

Geoekun Chile

 

Resumen de la presentación

In the near future, global demand for base- and strategic, or critical, metals is predicted to increase to palliate the needs of the ongoing energy transition. One consequence will be the expansion of large base-metal mining operations, the largest of which are probably porphyry Cu-Mo system. Porphyry deposits are known to host critical metal in addition to the base metals they are mined for, like Cu and Mo. Their possible recovery, in addition to significantly improve the operation’s economic benefit, would provide a low-impact means of extracting these metals. However, critical metal distribution across these deposits and their metallurgical circuit is usually poorly defined and their grades unknown because of dilution occurring during geochemical assays performed in whole-rock samples. In addition, because some critical metals are generally contained in pyrite, a sulfide considered as barren, they are typically overlooked and just go to waste.

In this contribution is exposed the results of implementing an advanced geochemical workflow to determine and quantify the content of critical and precious metals on sulfides from a porphyry copper deposit. The implemented workflow combine conventional and operating geochemical methods with techniques for in-situ mineral chemistry, such as laser ablation coupled to mass spectrometry (LA-ICP-MS). Compared to standard protocols, this workflow will provide a clear view of where critical and precious metals (thus far undetected or only poorly so) are hosted and their location within the mine and the Cu-metallurgical circuit (e.g., Figure 1). The implementation of this advanced geochemical workflow has the potential to shift operations from traditional Cu (± Mo) mining to high-performance multi-metallic activity.

Please cite as:

Velasquez G. et al., 2020-A: Tracking Cobalt, REE and Gold from a Porphyry-Type Deposit by LA-ICP-MS: A Geological Approach towards Metal-Selective Mining in Tailings. Minerals, 10, 109; doi:10.3390/min10020109

Velasquez G. et al., 2020-B: Metal-Selective Processing from the Los Sulfatos Porphyry-Type Deposit in Chile: Co, Au, and Re Recovery Workflows Based on Advanced Geochemical Characterization. Minerals 2020, 10, 531; doi:10.3390/min10060531

 

Sobre el Expositor

Geólogo Senior, con título profesional de Ingeniero Geólogo (Venezuela, 2003), Maestría en Geoquímica (Venezuela, 2006) y Doctor en Metalogénesis (Francia, 2012), con experiencia en investigación científica en el campo de la Geología Económica Aplicada a depósitos minerales, adquirida durante 15 años de trabajo orientado a la innovación en caracterización mineral de sulfuros y metales críticos.

Experiencia en ejecución de proyectos con la industria minera internacional (más de 20), tanto multidisciplinarios vía consorcio AMIRA, como enfocado en la implementación del conocimiento científico de frontera para la optimización del negocio minero;  con colaboración internacional activa (Francia, Australia, Chile). Habiendo trabajado en modelos metalogénicos para diferentes tipos de depósitos: orogénico-Au, pórfido-Cu-Mo, placer-COLTAN (Nb-Ta) y no convencionales-U, en diferentes países: Venezuela, Chile, Ghana, Burkina Faso, resultados presentados en publicaciones científicas (más de 15 WoS), congresos y seminarios.