Abstract The western North American Great Basin's Carlin-type deposits represent the largest accumulation of gold in Northern Hemisphere. controversy over their origins echoes debate between Neptunists and Plutonists at birth modern geology: were causative processes meteoric or magmatic? Sulfur isotopes have long been considered key to decoding metal cycling Earth's crust, but previous studies ...

In the south of Far East, a large deposit Sukhoe gold has been identified, where noble metal is in dispersed form, being present form microscopic particles, or entering structure sulfide minerals. It was found out that «invisible» (nano) finding mainly associated with pyrite and arsenopyrite. To develop technology for extracting useful component, completeness convenience opening stone material ...

Abstract Gold mobilization, transfer, and concentration in the Earth’s crust are controlled by hydrothermal sulfur- chloride-bearing fluids. Yet exact chemical identity, structure, stability of Au-bearing species and, particular, respective contributions sulfide (HS−) trisulfur ion (S3⋅−) ligands to Au transport lack direct situ evidence. Here we employed high energy resolution fluorescence det...

Bacterial pre-oxidation of refractory gold concentrates generates large volumes leachate and requires a significant supply nutrients to support bacterial growth. Therefore, bioleachate reuse reduces both water consumption the required for process. However, efficiency this method its benefit need be further explored. In present study, two tests on in new cycles oxidation were carried out evaluat...

In this study a novel method was developed to fabricate cadmium sulfide nanoparticles/multiwalled carbon nanotubes composite modified gold electrode (CdSNPs/MWCNTS/AuE) to measure trace amounts of norepinephrine(NE), indomethacin (IND), and uric acid (UA) simultaneously. Electrochemical investigations were carried out using cyclic voltammetry (CV), differential pulse voltammetry (DPV) and chron...

electrosynthesis process has been used for preparation of zinc sulfide nanoparticles. zinc sulfide nanoparticles in different size and shapes were electrodeposited by electrolysis of zinc plate as anode in sodium sulfide solution. effects of several reaction variables, such as electrolysis voltage, sulfide ion concentration as reactant, stirring rate of electrolyte solution and temperature on p...