scholarly journals Evaluation of the flotation characteristics of a copper-gold-silver ore from Lucky Luke Mine, Usk, British Columbia

1966 ◽  
Author(s):  
G I Mathieu
Keyword(s):  
British Columbia ◽  
Gold Silver ◽  
Copper Gold

scholarly journals Металлогения Конгинской зоны Омолонского террейна (Северо-Восток Азии)

2021 ◽  
pp. 3-16
Author(s):  
A. N. Glukhov ◽  
◽  
V. V. Priymenko ◽  
M. I. Fomina ◽  
V. V. Akinin ◽  
...  
Keyword(s):  
Porphyry Copper ◽  
Gold Silver ◽  
Copper Gold ◽  
Polymetallic Mineralization ◽  
Polymetallic Ore ◽  
Copper Ores

The article presents new data on geology, mineralogy, and geochemistry of porphyry-copper, gold-silver, and silver-polymetallic ore occurrences in the Kongin magmatic zone of the Omolon terrane and granitoids, associated with it. It has been demonstrated that petrology and the age of granitoids are similar to those in the OCVB Penzhina segment. Mineralization of the Kongin zone is very close to that of the OCVB, differing in relatively high Mo in porphyry-copper ores and prevalence of silver-polymetallic mineralization over gold-silver.

scholarly journals Synthesis of Medium-Sized Heterocycles by Transition-Metal-Catalyzed Intramolecular Cyclization

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3147 ◽  
Author(s):  
Mickael Choury ◽  
Alexandra Basilio Lopes ◽  
Gaëlle Blond ◽  
Mihaela Gulea
Keyword(s):  
Transition Metal ◽  
Intramolecular Cyclization ◽  
Biologically Active ◽  
Conformational Constraints ◽  
Synthesis Strategy ◽  
Gold Silver ◽  
Copper Gold ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed ◽  
Active Natural

Medium-sized heterocycles (with 8 to 11 atoms) constitute important structural components of several biologically active natural compounds and represent promising scaffolds in medicinal chemistry. However, they are under-represented in the screening of chemical libraries as a consequence of being difficult to access. In particular, methods involving intramolecular bond formation are challenging due to unfavorable enthalpic and entropic factors, such as transannular interactions and conformational constraints. The present review focuses on the synthesis of medium-sized heterocycles by transition-metal-catalyzed intramolecular cyclization, which despite its drawbacks remains a straightforward and attractive synthesis strategy. The obtained heterocycles differ in their nature, number of heteroatoms, and ring size. The methods are classified according to the metal used (palladium, copper, gold, silver), then subdivided according to the type of bond formed, namely carbon–carbon or carbon–heteroatom.

Mineral deposits of Latin America and the Caribbean. Preface

2020 ◽  
Vol 72 (3) ◽  
pp. P250820
Author(s):  
Joaquín A. Proenza ◽  
Lisard Torró ◽  
Carl E. Nelson
Keyword(s):  
Latin America ◽  
Iron Oxide ◽  
Dominican Republic ◽  
Iron Ore ◽  
Mineral Exploration ◽  
Mineral Deposits ◽  
Special Issue ◽  
Gold Silver ◽  
Copper Gold ◽  
The Caribbean

The region that encompasses Latin America and the Caribbean is a preferential destination for mining and mineral exploration, according to the Mineral Commodity Summaries 2020 of the US Geological Survey (https://www.usgs.gov/centers/nmic/). The region contains important resources of copper, gold, silver, nickel, cobalt, iron, niobium, aluminum, zinc, lead, tin, lithium, chromium, and other metals. For example, Chile is the world’s largest copper producer and the second largest lithium producer. Brazil is the world’s leading niobium producer, the second largest producer of iron ore, and the third-ranked producer of tantalum. Cuba contains some of the largest reserves of nickel and cobalt in the world, associated with lateritic Ni-Co deposits. Mexico is traditionally the largest silver producer and contains the two largest mines in this commodity and, along with Peru, Chile, Bolivia and Argentina, accounts for more than half of the total amount of global silver production. The region also hosts several world-class gold mines (e.g., Pueblo Viejo in the Dominican Republic, Paracotu in Brazil, Veladero in Argentina, and Yanacocha in Peru). Also, Bolivia and Brazil are among the world’s leading producers of tin. The region hosts a variety of deposit types, among which the most outstanding are porphyry copper and epithermal precious metal, bauxite and lateritic nickel, lateritic iron ore from banded iron-formation, iron-oxide-copper-gold (IOCG), sulfide skarn, volcanogenic massive sulfide (VMS), Mississippi Valley type (MVT), primary and weathering-related Nb-bearing minerals associated with alkaline–carbonatite complexes, tin–antimony polymetallic veins, and ophiolitic chromite. This special issue on Mineral Deposits of Latin America and the Caribbean in the Boletín de la Sociedad Geológica Mexicana contains nineteen papers. Contributions describe mineral deposits from Mexico, Panama, Cuba, Dominican Republic, Colombia, Venezuela, Ecuador, Chile, and Argentina. This volume of papers covers four mineral systems (mafic-ultramafic orthomagmatic mineral systems, porphyry-skarn-epithermal mineral systems, iron oxide copper-gold mineral systems, and surficial mineral systems). This special issue also includes papers on industrial minerals, techniques for ore discovery (predictive modelling of mineral exploration using GIS), regional metallogeny and mining history.

The Red Chris Porphyry Copper-Gold Deposit, Northern British Columbia, Canada: Igneous Phases, Alteration, and Controls of Mineralization

2015 ◽  
Vol 110 (4) ◽  
pp. 857-888 ◽  
Author(s):  
C. Rees ◽  
K. B. Riedell ◽  
J. M. Proffett ◽  
J. Macpherson ◽  
S. Robertson
Keyword(s):  
British Columbia ◽  
Gold Deposit ◽  
Porphyry Copper ◽  
Copper Gold

scholarly journals Modeling groundwater flow and salinity evolution near TSF Żelazny Most. Part I – groundwater flow

2018 ◽  
Vol 54 ◽  
pp. 00036
Author(s):  
Waldemar Świdziński
Keyword(s):  
Numerical Model ◽  
Groundwater Flow ◽  
Chloride Transport ◽  
Numerical Models ◽  
General Information ◽  
Water Mixture ◽  
Groundwater Environment ◽  
Gold Silver ◽  
Copper Gold ◽  
System Part

Tailings which are by-product of the extraction of various metals (copper, gold, silver, molybdenum, etc.) are often stored in so called Tailings Storage Facilities (TSF), where they are deposited as a soil-water mixture by spigotting. In many cases the water discharged together with tailings to the TSF is rich in salts and other chemical compounds imposing negative pressure to the groundwater environment. Even in the case of total or partial lining of such facilities and well-developed drainage systems to control leaching, some portion of contaminated water often seeps either through the surrounding dams or the bed into adjacent groundwater bodies. Numerical models can be very helpful tools to assess the extent of the contamination and particularly to predict its potential development in the future. This paper and the companion one describe such a numerical model developed for Żelazny Most Tailings Storage Facility (south-west Poland), one of the world’s largest tailings sites. In the first part general information about the facility is provided and a 3D hydrogeological numerical model of the structure is described. Groundwater flow pattern near the facility obtained from numerical simulations is confronted with the measurements from a comprehensively developed monitoring system. Part II will be focused on the modelling of chloride transport in groundwater.

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