MINERÍA la mejor puerta de acceso al sector minero MINERÍA / MAYO 2023 / EDICIÓN 548 55 Abstract This study aims to characterize, through the use of lithogeochemistry, the magmatic series and the host rock that took place in the formation of the Cerro Lindo VMS; in addition, alteration lithogeochemistry was performed to determine the relationship between mineralogy, lithogeochemistry and alteration intensity, obtaining as a result, vectors towards the center of the system. The primary purpose is to bring this 2D information from lithogeochemical diagrams into a 3D approach, and thus establish correlations with other controls on mineral occurrence (structural, geophysical, geochemical and lithological). From the analysis and interpretations it was determined that Cerro Lindo belongs to a calc-alkaline magmatic series with a high K content, the source rock definitely corresponds to felsic volcanic with a degree of differentiation from andesite to rhyodacite according to the degree of proximity to the economic zones; that is to say, the deposit is located in the oldest felsic bimodal level of the Casma basin, and it is these first stages of the fracture that are usually better enriched in contents of economic mineralization mainly of base elements followed by the presence of Ag*-Au; it is precisely this location that makes it much more powerful than other VMS in the area. The SerK+ChlFe (Py) alteration halo has greater thickness and dominance on lower angle deep faults, which have brought economic Zn-Cu mineralization (NW-SE and NE-SW), faults related to high grade bodies and high chargeability zones; while the shallow NW-SE faults, of higher angle, that carry low grade mineralization and related to edge bodies of low chargeability would correspond to the Ser-Chl alteration and towards the more distal zones of the system, the SerNa-Chl Mg alteration appears. enriquecidas en contenidos de mineralización económica principalmente de elementos base seguido de la presencia de Ag*-Au; es justo esta ubicación que lo hace mucho más potente que los demás VMS de la zona. El halo de alteración SerK+ChlFe (Py) tiene mayor potencia y dominio en fallas profundas de menor ángulo, que han traído mineralización económica de Zn –Cu (NW-SE y NE-SW), fallas relacionadas a los cuerpos de alta ley y a zonas de alta cargabilidad; mientras que las fallas poco profundas NW-SE, de mayor ángulo, que traen mineralización de baja ley y están relacionadas a cuerpos de borde de baja cargabilidad corresponderían a la alteración Ser-Chl y hacia las zonas más distales del sistema, aparece la alteración SerNa-Chl Mg. Introducción El área de estudio se ubica en la parte occidental del Perú, en la provincia de Chincha, departamento de Ica, a 175 km al SE de Lima. Cerro Lindo es un depósito de sulfuro masivo vulcanogénico VMS de Zn-Cu (Ag-Pb), 52 Mt de reservas (P+P) con 1.44 %Zn, 0.61%Cu, 0.20%Pb, 0.68 oz/t Ag (2020), y está compuesto de varios cuerpos subverticales. Figura 2. Diagrama del proceso de la metodología aplicada.
RkJQdWJsaXNoZXIy MTM0Mzk2