No description available.

The Stewart mining camp in northwestern British Columbia is abundantly mineralized with widely distributed, texturally and mineralogically varied, precious and base metal deposits. This report documents the geologic setting of the mining camp and the geologic features of the major mineral deposit types. The Stewart camp is underlain by a 5-kilometre-thick Upper Triassic to Lower Jurassic (Norian? to Toarcian) island arc complex of calc-alkaline basalts, andesites and dacites with interbedded sedimentary rocks. Coeval (211-189 Ma) hornblende granodiorite plutons intruded the arc at two to five kilometres depth. Rocks were deformed during mid-Cretaceous (110 ± 5 Ma) tectonism that produced north-northwest-trending folds, penetrative fabric and lower greenschist facies regional metamorphism (290°±20°C, 4.5 ±1.5 kb). Mid-Eocene (54.8-44.8 Ma) biotite granodiorite of the Coast Plutonic Complex intruded the deformed Mesozoic arc complex. Two mineralizing events formed over 200 mineral occurrences in the district. These two metallogenic epochs were brief (< 5 million years), regional-scale phenomena characterized by different base and precious metal suites. The Early Jurassic ore-forming episode produced Au and Au-Ag-Zn-Pb-Cu deposits. The mid-Eocene episode produced Ag-Pb-Zn ± W ± Mo deposits. Early Jurassic deposits have a characteristic lead isotope signature (²⁰⁶Pb/²⁰⁴Pb = 18.816; ²⁰⁷Pb/²⁰⁴Pb = 15.617) and include gold-pyrrhotite veins, gold-silver-base metal veins, and stratabound pyritic dacites. All Early Jurassic mineral occurrences are late- to post-intrusive deposits that were emplaced in andesitic to dacitic host rocks at the close of volcanic activity, about 190-185 million years ago. Transitional gold-pyrrhotite veins (Scottie Gold mine) formed in en echelon tension gashes developed in country rock around Early Jurassic plutons during late magma movement. Epithermal gold-silver-base metal veins and breccia veins (Big Missouri and Silbak Premier mines) were deposited along shallower sub-volcanic faults and in hydrothermal breccia zones formed along dyke contacts. Stratabound pyritic dacite tuffs (Mount Dilworth and Iron Cap prospects) formed where venting fumarolic fluids and hotspring pools deposited abundant fine pyrite in local areas on a cooling ignimbrite sheet. Eocene deposits also have a characteristic lead isotope signature (²⁰⁶Pb/²⁰⁴Pb = 19.147; ²⁰⁷Pb/²⁰⁴Pd = 15.627) and include silver-rich galena-sphalerite veins, gold-silver skarns and, beyond the study area, porphyry molybdenum deposits. These mineral occurrences are related to Middle Eocene plutons of the Coast Plutonic Complex. All are late- to post-intrusive deposits emplaced about 50-45 million years ago. Mesothermal silver-lead-zinc veins (Prosperity/Porter Idaho and Riverside mines) were deposited in brittle zones along major fault structures. Skarns (Oral M and Red Reef prospects) developed where plutons cut limestone or limy siltstone units within minor turbidite sequences. Major porphyry molybdenum deposits (Kitsault mine and Ajax) developed where mid-Eocene stocks were emplaced in thick turbidite sequences. Diagnostic features such as lead isotope ratios, stratigraphic and plutonic associations, alteration assemblages, sulphide mineralogy and textures, and precious metal ratios allow discrimination amoung these different deposit types. Using these criteria, the most prospective areas for each deposit type have been targetted for exploration. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

No description available.

The West Ansil deposit was the first Cu discovery in 25 years in the Noranda Central Camp. It has a combined indicated and inferred resource of ~1.2 Mt. Grades for the indicated resource are 3.4% Cu, 0.4% Zn, 1.4 g/t Au and 9.2 g/t Ag. The bulk of the resource is located in three massive sulphide lenses (Upper, Middle and Lower) that are entirely within the Rusty Ridge Formation above the Lewis exhalite. The mineralization in all three ore lenses consists of massive pyrrhotite + chalcopyrite + magnetite. Semi-massive sphalerite is restricted to the upper and lower parts of the Middle lens. Massive magnetite occurs at the center of the Upper and Middle lenses, where it replaces massive pyrrhotite. A striking feature of West Ansil is the presence of abundant colloform and nodular pyrite (+marcasite) in the massive sulphides. Late-stage replacement of massive pyrrhotite by colloform pyrite and marcasite, occurs mostly along the upper and lower contacts of the lenses.

The West Ansil deposit was the first Cu discovery in 25 years in the Noranda Central Camp. It has a combined indicated and inferred resource of ~1.2 Mt. Grades for the indicated resource are 3.4% Cu, 0.4% Zn, 1.4 g/t Au and 9.2 g/t Ag. The bulk of the resource is located in three massive sulphide lenses (Upper, Middle and Lower) that are entirely within the Rusty Ridge Formation above the Lewis exhalite. The mineralization in all three ore lenses consists of massive pyrrhotite + chalcopyrite + magnetite. Semi-massive sphalerite is restricted to the upper and lower parts of the Middle lens. Massive magnetite occurs at the center of the Upper and Middle lenses, where it replaces massive pyrrhotite. A striking feature of West Ansil is the presence of abundant colloform and nodular pyrite (+marcasite) in the massive sulphides. Late-stage replacement of massive pyrrhotite by colloform pyrite and marcasite, occurs mostly along the upper and lower contacts of the lenses.

The West Ansil deposit was the first Cu discovery in 25 years in the Noranda Central Camp. It has a combined indicated and inferred resource of ~1.2 Mt. Grades for the indicated resource are 3.4% Cu, 0.4% Zn, 1.4 g/t Au and 9.2 g/t Ag. The bulk of the resource is located in three massive sulphide lenses (Upper, Middle and Lower) that are entirely within the Rusty Ridge Formation above the Lewis exhalite. The mineralization in all three ore lenses consists of massive pyrrhotite + chalcopyrite + magnetite. Semi-massive sphalerite is restricted to the upper and lower parts of the Middle lens. Massive magnetite occurs at the center of the Upper and Middle lenses, where it replaces massive pyrrhotite. A striking feature of West Ansil is the presence of abundant colloform and nodular pyrite (+marcasite) in the massive sulphides. Late-stage replacement of massive pyrrhotite by colloform pyrite and marcasite, occurs mostly along the upper and lower contacts of the lenses.

The West Ansil deposit was the first Cu discovery in 25 years in the Noranda Central Camp. It has a combined indicated and inferred resource of ~1.2 Mt. Grades for the indicated resource are 3.4% Cu, 0.4% Zn, 1.4 g/t Au and 9.2 g/t Ag. The bulk of the resource is located in three massive sulphide lenses (Upper, Middle and Lower) that are entirely within the Rusty Ridge Formation above the Lewis exhalite. The mineralization in all three ore lenses consists of massive pyrrhotite + chalcopyrite + magnetite. Semi-massive sphalerite is restricted to the upper and lower parts of the Middle lens. Massive magnetite occurs at the center of the Upper and Middle lenses, where it replaces massive pyrrhotite. A striking feature of West Ansil is the presence of abundant colloform and nodular pyrite (+marcasite) in the massive sulphides. Late-stage replacement of massive pyrrhotite by colloform pyrite and marcasite, occurs mostly along the upper and lower contacts of the lenses.

En un mercado tan competitivo, día a día se busca resaltar cualidades de una organización que marquen la diferencia, es por eso que la empresa MACLEHI, mediante su área de geosintéticos, ha decidido ejecutar el proyecto de “impermeabilización de techos en campamentos mineros aplicando los Estándares Globales del PMI” ubicado en la zona andina de nuestro País, la cual busca brindar su servicio especializado. Nuestros entregables a realizar son los siguientes: Trabajos preliminares. Impermeabilización de techos nuevos. Impermeabilización por cambio de material. Reparaciones. Dirección de proyectos. El proyecto será ejecutado en un plazo de 150 días y la inversión inicial requerida, será de S/. 1, 644,480.68 nuevos soles, donde el 60% de la inversión será asumida por socios de la empresa y el 40% será obtenido mediante un préstamo bancario. Hemos aplicado el concepto de Caso de Negocio, lo que nos ha permitido estimar que nuestro VAN es de S/. 74,382.88, nuestra TIR es de 41% generando rentabilidad a nuestro proyecto y es mayor a nuestra tasa de costo del proyecto (WACC) que es de 13.36% que es promedio ponderado, tanto de la deuda bancaria, como el capital propio que se invertirá en el inicio del proyecto. La aplicación de los Estándares Globales del PMI y el cálculo que se determina según el VAN y la TIR, además de los otros indicadores financieros; nos da la viabilidad positiva para continuar el proyecto de la empresa MACLEHI ya que cumple con el objetivo de crear valor a la empresa y obtener rentabilidad. Observaciones: En el proyecto no se desarrolló la Línea Base para Medir el Desempeño por el nivel de madurez de la empresa. / In such a competitive market, every day we seek to highlight qualities of an organization that make a difference, that is why the MACLEHI company, through its geosynthetics area, has decided to carry out the project of “waterproofing roofs in mining camps applying the PMI Global Standards ” Located in the Andean area of ​​our Country, which seeks to provide its specialized service. Our deliverables to be carried out are the following: Preliminary work. Waterproofing of new roofs. Waterproofing due to material change. Repairs. Project management. The project will be executed within a period of 150 days and the initial investment required will be S /. 1, 644,480.68 nuevos soles, where 60% of the investment will be assumed by partners of the company and 40% will be obtained through a bank loan. We have applied the Business Case concept, which has allowed us to estimate that our VAN is S /. 74,382.88 our TIR is 41% generating profitability for our project and is higher than our project cost rate (WACC) which is 13.36%, which is weighted average, both of the bank debt, and the equity that will be invested in the start of the project. The application of the PMI Global Standards and the calculation that is determined according to the VAN and the TIR, in addition to the other financial indicators; It gives us the positive viability to continue the project of the MACLEHI company since it fulfils the objective of creating value for the company and obtaining profitability. Observations: The project did not develop the Baseline to Measure Performance due to the maturity level of the company. / Trabajo de investigación