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By C. Chávez, J. Portilla

El prospecto se ubica en el distrito de Chojata, provincia de General Sanchez Cerro, departamento de Moquegua y a altitudes desde 4,200 a 4,700 m.s.n.m. Las alteraciones más importantes en la brecha andesitica, son la silicificación (calcedonia, ópalo) y cloritizacion; también se observa un poco la presencia de sericita y algo de calcita.

May 1, 2008

By John Palomino Melgarejo, Jose Soto

Compañía de minas Buenaventura en concordancia con su política ambiental y en cumplimiento con sus normas legales vigentes ha venido cumpliendo la ejecución del plan de cierre de la Unidad Esperanza; la estabilización Física, geoquímica e Hidrológica fueron la base de los trabajos operativos, para ello se realizó una revisión minuciosa de las especificaciones técnicas de ingeniería de detalle para el cierre de bocaminas con efluentes y se ha propuesto nuevas actividades de ingeniería para la correcta ejecución de los trabajos programados. Así mismo se complementó nuevos productos los cuales dan un valor agregado a los trabajos de impermeabilización de bocaminas asegurando su funcionalidad al largo del tiempo.

Sep 1, 2017

By Silvio Hernández Aquije

El presente texto señala el descubrimiento del vanadio en el Perú, así como las cualidades de resistencia que imprime este elemento en los aceros. De otro lado, se menciona la clasificación que hizo L.Lunay de los depósitos vanadíferos que tienen un interés económico en la minería.

May 1, 1955

By Abrahan Barriga

The present study demonstrates the feasibility of the ultrafine grinding and atmospheric leaching process applied to refractory gold concentrates from Salave Project located in northern Spain. At bench scale, it was found acceptable sulfide oxidation was about 84-85% and CIL gold recoveries between 95-96% applying specific energy consumption between 30 and 60 kWh/t during ultrafine grinding. The atmospheric oxidation of the sulfide concentrate was controlled between pH 4.4 and 4.8 with a mixture 90/10 of CaCO3/NaCO3 with residence time of 48 hours for the atmospheric oxidation and 30 hours residence time for the CIL process.

Sep 30, 2022

By Kevin B. Heather, Stewart D. Redwood

The AntaKori Project, located in the Hualgayoc mining district, has a NI 43-101 compliant inferred sulphide mineral resource of 295 Mt @ 0.36 g/t Au, 0.48 % Cu and 10 g/t Ag (Wilson, 2012) which is still open in all directions. It is a calcic copper-gold-silver skarn. Mineralization is principally hosted in prograde and retrograde exoskarn in the Cretaceous Chulec and Inca Formations, as well as in quartzites and arkosic sandstones/siltstones of the underlying Farrat Formation. Additional mineralization is hosted by early porphyry intrusions, which are weakly mineralized, as well as locally well-mineralized phases of breccia. The porphyry system responsible for skarn-style mineralization has not been discovered yet.

May 1, 2008

By Samuel Canchaya M.

"El MGMB predictivo marca un hito revolucionario en la actividad minera, ya que permitirá un diseño optimizado y una mejor gestión de: la voladura, conminución, flotación, lixiviación o cianuración, etc.; además facilitará minimizar costos de energía y consumo de aditivos; así como optimizar la selección de mineral, el “ore control”, el “blending”, etc.; así como disminuirá drásticamente los problemas de la No Reconciliación. En este trabajo se detalla las características y el procedimiento para implementar el MGMB."

Sep 1, 2017

By Larry Meinert

Most large skarn deposits are zoned in both space and time relative to associated intrusions, and this zonation can be used to guide exploration. Zonation occurs on scales from km to, and reflects infiltrative fluid flow, wallrock reaction, temperature variations, and fluid mixing. In most skarn systems, there is a general zonation pattern of proximal garnet, distal pyroxene, and vesuvianite (or a pyroxenoid such as wollastonite, bustamite, or rhodonite) at the marble front. In addition, individual skarn minerals may display systematic color or compositional variations within the larger zonation pattern. Such patterns are reviewed for several well-studied examples of Cu, W, Au, and Zn-Pb-Ag skarns. In addition, many deposits have endoskarn or other alteration of the associated intrusion and recrystallization or other subtle changes in the surrounding wallrocks.

Apr 24, 2001

By Carlos Torres, Albert Cabrejo

For the last 20 years mine slopes have been monitored with slope stability radars. Since 2015 a group of dedicated geotechnical engineers dedicated to remotely monitor radars around the world have detected 2000+ slope failures of different characteristics. A statistical analysis of the information gathered of these failures have been made and the summarized results are presented with some degree of analysis appropriate for the vastness of the database. The analysis considers different types of commodities, countries, mining processes, rock types, and weather conditions.

Sep 29, 2023

By Bradley Lawson

This case study examines the control system re-design and network modifications implemented by Conveyor Dynamics Inc. on the original El Brocal Overland Conveyor system to resolve problems associated with the conveyor drive torque control during starting, stopping and running conditions. These problems resulted in symptoms including erratic conveyor behavior, belt over tension, drive slip and inability to achieve nameplate capacity.

Sep 1, 2017

By Paloma Camargos, Saulo De Rezende

In the pursuit of sustainable development, the mining industry is constantly evolving, recognizing the importance of utilizing all extracted materials. Nexa addresses waste management in the mining industry, with an emphasis on the adoption of waste as innovative and sustainable raw materials. With a focus on exploring the potential of mining waste, the characteristics of materials from the Vazante and Ambrosia units were evaluated to determine their suitability as aggregates in the construction industry, as well as to identify other possible applications.

Sep 29, 2023

By Alberto Benavides Q

El presente trabajo señala el rol de la minería dentro del área del Pacto andino a fin de conocer el desarrollo futuro de SudAmérica y su relación con los beneficios de una integración entre los países andinos. Para ello, se revisa las consideraciones geológicas sobre los Andes Sudamericanos, el desarrollo socio-económico, la posibilidad futura para el desarrollo y la función del Perú en el proceso de desarrollo de los países andinos.

Nov 20, 1978

By Norman Castillo Castillo

El presente trabajo plantea dos alternativas para afrontar la crisis minera que se desarrolla en la mina Raura del Perú. La primera, estriba en mantener el ritmo de producción e incrementar la ley de cabeza. Mientras que la segunda, refiere el cierre total de la minería convencional para enfocarse a la franja mesomática tipo skarn de la sección Catuva, utilizando métodos altamente mecanizados que incrementan la producción paulatinamente. En este sentido, se optó por la segunda alternativa puesto que el potencial minero en Raura proyecta a mayores niveles de producción y las reservas actuales se corresponden con la amortización de la deuda. Asi también se describe las características geológicas y locales del distrito minera de Raura, producción histórica, potencial minero, reservas económicas y se analiza los métodos de minado de tajo abierto y mina subterránea como los resultados de dicha valuación económica.

Nov 24, 1993

By Stefano Utili, Robert Pell, Nelson Morales, Cristobal Valderrama, Andrea Agosti, Guillermo Albornoz

The overall slope angle (OSA) of pit walls plays a crucial role in the financial return of open pit mines. The work showcases a novel design methodology where non-planar geotechnically optimal pit walls with an OSA steeper than what is used in current design practices are employed without compromising mine safety, i.e. the optimal profiles are featured by the same Factor of Safety (FoS) than their traditional design counterparts. In the current design practice, pit wall profiles are often designed to be planar in cross-section and the profile in between ramps especially tend to be defined by a constant inter-ramp angle.

Sep 30, 2022

By Caio Moreira, Saulo De Rezende, Nelly Ruíz

The present project sought alternatives for this material through the Mining Lab Beginnings program, which was developed by Nexa in partnership with Escalab to find solutions for the company's highly complex challenges. Through the program, several solutions were evaluated, with additives for the construction market being the most prominent. Tests were conducted to confirm the efficiency of jarosite in the mixture that composes this material. With successful laboratory tests, the technology was tested on an industrial scale, where it also demonstrated its technical and economic viability. The project is now moving into the operational phase, demonstrating that circular economy is the best solution for disposed tailings.

Sep 29, 2023

By Natalie Caciagli

Catchment basin sampling allows for rapid assessment of large areas. Stream sediment surveys are a common tool used in regional exploration. The difficulty in detecting geochemical anomalies in stream sediment data from large regional datasets lies in finding the background values of pathfinder elements due to variable lithologies that could be sampled within a single basin. An alternative data driven method to discover anomalies in complex environments, without a priori knowledge of background concentrations, is presented here

May 10, 2023

By Greg Corbett

The paper point out the styles of Pacific Rim epithermal gold mineralization. Some characteristics of differing styles of epithermal gold mineralization influence investment decisions (metallurgy, metal ratios, mining style), while others should be taken into account during prospecting (pyrite content and resistivity govern geophysical techniques, vein/breccia styles control drilling, gold distribution influences ore reserve determinations). Two groups of epithermal deposits are distinguished by the fluid style which controls ore and gangue mineralogy. High sulfidation systems develop from the reaction of hot acidic magmatic fluids with host rocks to produce characteristic zoned alteration and later sulfide (dominantly enargite-pyrite) and Au-Ag-Cu deposition. Ore systems display permeably controls governed by lithology, structure and breccias, typically phreatomagmatic breccia pipes, and should be distinguished from a group of generally non-economic acidic alteration including: steam heated alteration, lithocaps or barren shoulders, acid sulfate, and magmatic solfatara alteration.

Apr 24, 2001

By J. N. Rivera

El objetivo del texto busca establecer una distribución más equitativa de los bonos mineros a través de un análisis de los factores influenciables en la explotación. El estudio describe un análisis detallado de los costos y eficiencias de una mina particular,diferenciándolos de los costos y constantes de un labor de corte-relleno, para asi determinar un sistema de bonos que tenga por base promedios pesados obtenidos del laboreo.

Nov 20, 1967

By Héctor Benavente Revilla

El presente texto señala la ubicación y acceso, reseña histórica, geología general y operación del yacimiento aurífero San Antonio de Poto, provincia de Sandia, distrito Ananea, ubicado en el departamento de Puno.

Mar 1, 1978

By José Pariona Z.

En el presente trabajo se presentaran los avances en la reducción de silicatos con el uso del CMC y sus efectos en los diferentes puntos de dosificación.

Sep 1, 2017

By Jorge Rodríguez Velarde

El presente trabajo describe un esquema matemático que simula un proceso de lixiviación química a partir del estudio de las variables más importantes y sus correlaciones entre sí. Para ello, se revisa los diseños experimentales, el equipo utilizado, las variables principales del sistema experimental, control de operaciones, discusión de resultados y algunas correlaciones de variables.

Nov 20, 1978