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Showing 1 to 20 of 22 for “"Porphyry Copper"”.
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General theory of cut-off grades as applied to porphyry copper-type deposits
Includes bibliographical references (pages 150-156).
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Reflectance spectroscopy as a remote sensing technique for the identification of porphyry copper deposits.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Science.
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Copper mineralization in the Coed-Y-Brenin Porphyry Copper Deposit, North Wales: Mineralogy and Textures
The Coed-Y-Brenin porphyry copper deposit represents the largest deposit (200 mt) of its kind within the UK. This study aims to further understand the mineralogy and textures of ore minerals within the Coed-Y-Brenin deposit. <br/><br/>The area consists of middle to upper Cambrian sediments, namely …
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The Evolution of the Los Negritos Porphyry Copper Deposit, Coquimbo, Chile: Geological, Geochronological, Mineralogical and Geochemical Evidence
The Los Negritos porphyry copper deposit is located ~ 4 km to the northeast of Carmen de Andacollo Mine in the Chilean Cretaceous metallogenic belt. The mineralization is hosted in andesite of the Quebrada Marquesa Formation and a series of at least four early to intramineral porphyry intrusive …
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Early Laramide Magmatism in Southern Arizona U-Pb Geochronology of Key Igneous Units and Implications for the Timing of Regional Porphyry Copper Mineralization
… in the emplacement of numerous productive (porphyry copper) deposits, associated Ag-base metal deposits, and barren intrusive units. The timing of these events has been loosely constrained by early K-Ar ages and cross-cutting field relationships; in many districts early Laramide volcanic …
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Silicate Melt Inclusions in Igneous Petrogenesis
… there are few studies of such inclusions from porphyry copper systems. A melt inclusion forms when magma is trapped in a growing phenocryst. If a phenocryst is able to preserve the original parent magma, then accurate information can be obtained for ancient volcanic systems. In recent igneous …
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Geochemical Evolution at White Island, New Zealand
… of the environment associated with formation of porphyry copper deposits. White Island has only been active for about 10 Ka and, as such, is thought to be an ideal location to study early magmatic processes associated with formation of porphyry copper deposits. In this study, the geochemistry of …
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Spatial and temporal evolution of fluids in hydrothermal ore deposits
… disappearance).<br />Red Mountain, AZ is a porphyry copper system with a well-preserved lithocap<br />providing an ideal candidate to characterize the shallow expression of porphyry copper<br />systems in the southwestern US. The distribution of fluid inclusions, alteration mineralogy<br …
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Synthetic High Resolution Block Model for Benchmarking Mining Technologies
… featuring 128 million nodes, was developed for a porphyry copper deposit and used to simulate mining decisions through the mine value chain. To achieve this, samples were extracted from the model by means of a drillhole campaign to allow for comparison of estimation and planning decisions with the …
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Magmatic evolution of the southern Centinela district, northern Chile: insights from PGE geochemistry and zircon fertility tools
Copper is one of the most widely used metals in our society and it is essential for a broad range of applications. Globally, nearly three quarters of this metal is sourced from porphyry copper deposits. For this reason, is important to understand the processes that control their formation. Recent …
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Magmatic evolution of the southern Centinela district, northern Chile: insights from PGE geochemistry and zircon fertility tools
Copper is one of the most widely used metals in our society and it is essential for a broad range of applications. Globally, nearly three quarters of this metal is sourced from porphyry copper deposits. For this reason, is important to understand the processes that control their formation. Recent …
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An Investigation of Copper Recovery from a Sulphide-Oxide Ore with a Mixed Collector System
Current copper deposits contain significant amounts of secondary non-sulphide minerals and newly discovered deposits are increasingly complex. As a result, research into the improvement of sulphide-oxide copper ores processing through the use of mixed collector systems has surged. The flotation of …
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Geology of the Ajax East and Ajax West, silica-saturated alkalic copper-gold porphyry deposits, Kamloops, South-Central British Columbia
… and Ajax West deposits are two of a number of porphyry copper-gold deposits that are hosted by the silica-saturated alkaline Iron Mask batholith, in the southern part of Quesnellia. The northwesterly trending batholith is an Early Jurassic composite intrusion emplaced in the Nicola Group, a …
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Petrology of the Cenozoic igneous rocks of the Tinton district, Black Hills, South Dakota - Wyoming
… include a stock of quartz latite/quartz trachyte porphyry, an alkalic ring dike complex, lamprophyre dikes and intrusive breccia.</p> <p>Precambrian rocks are represented by a sequence of metapelites thst have been intruded by metabasite and granitic pegmatite dikes. The schistosity of the …
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An economic analysis of coal desulpharisation by froth flotation to prevent acid rock drainage (ARD) and an economic review of capping covers and ARD treatment processes
… have proven its technical feasibility using porphyry copper tailings, fine coal and more recently gold tailings. Historically, ultrafine coal was not treated by most collieries in South Africa, but disposed as waste. Oxidation of the pyrite in the coal leads to generation of acidic water. In …
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Data-driven approaches towards understanding trace metal and magmatic processes in arc volcanoes, with applications to Java, Indonesia
… petrological processes favor the enrichment of copper and the optimization of ore-forming potential in a magma? These global insights are complemented by a detailed petrological study of Mount Slamet volcano, Java, Indonesia, infused with computational advances in machine-learning. Java has 45 …
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Fluid Inclusion Characteristics in Magmatic-Hydrothermal Ore Deposits
… of fluid inclusions formed in associated with porphyry copper mineralization has been predicted using a computer model. A simple geologic model of an epizonal intrusion was developed based on a Burnham-style model for porphyry systems and thermal models of the evolution of epizonal intrusions. …
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Paleogeography of Western North America: Insights from Detrital Zircon U-Pb Geochronology and Hf Isotope Geochemistry
… Ranges, Sierra Madre Occidental, and the Porphyry Copper Province. Identifying changes in sediment provenance from Sevier thin-skinned thrusting through the formation of Laramide basement block uplifts was accomplished by conducting U-Pb geochronologic and Hf isotopic analyses on 32 …
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Magmatic and volcanic processing of volatile and chalcophile elements
… including several chalcophile elements such as copper, selenium, and silver. Copper in particular is essential – it is a key component in wind and solar technologies, as well as energy storage systems, all of which are central to the energy transition. However, with existing ore grades declining …
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Physical and chemical aspects of fluid evolution in hydrothermal ore systems
… Numerical modeling indicates that sufficient copper can be partitioned from a "typical" calc-alkaline melt into an exsolving fluid to produce an economic porphyry copper deposit. Neither non-magmatic sources nor an additional hidden magma source are necessary to provide copper to the system …
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