Thiourea does not undergo any degradation reaction during the course of reduction, and it can be recycled. High recovery is obtained (>99%) and the product is pure. The reduction reaction is selective for gold and silver over base metals in a solution mixture since the reaction is carried out in acidic medium. Gold reduction by sodium borohydride is more favorable in the presence of Ag + and/or Zn 2+ ions, while the presence of Fe 2+, Co 2+, Ni 2+, and Cu 2+ ions decreases the efficiency of borohydride. Stock analysis for Precipitate Gold Corp (PREIF:OTC US) including stock price, stock chart, company news, key statistics, fundamentals and company profile. Different parameters controlling the rate of the reaction and the efficiency of borohydride were studied, namely: acidity, stoichiometry, thiourea concentration, the presence of foreign ions, and temperature.
The reduction of Au(I) in such solutions can be performed for a wide range of gold concentrations (2 mg/L-2 g/L). The reduction reaction is carried out at ambient temperature for a very short period of time (30 s). The Au(I) ion is reduced to metallic gold in the form of very fine crystals, as indicated by XRD and SEM analysis. Channel samples: 0.5m of 4.5 g/t Au, 1.5m of 10.1 g/t Au, 6.2m of 3.6 g/t Au Airborne magnetic geophysics, surface geochemical samples (elevated gold and arsenic) and surface structural lineaments, identifies 7 high priority and 11 secondary target areas Located within Newfoundland's Burin Peninsula, a current gold exploration focus of many other junior explorationists District-scale potential within a 12,350 hectare project, an estimated 16.5-km long exploration trend hosted in late Proterozoic-age Burin Group volcanic and ultramafic rocks Structurally related orogenic gold style mineralization, where gold enriched quartz veins- stockworks are strongly associated with shears, faults and folds containing low pyrite and arsenopyrite sulphide concentrations and Excellent year-round road access, with highway access, a high-power electrical line bisecting the project, and nearby Atlantic Ocean ports.Sodium borohydride can be used as an efficient agent for reducing gold and silver in acidic solutions of thiourea, thiocyanate, thiosulfate, acid chloride, and acid nitrate. (TSXV:PRG,OTCQB:PREIF) is a mineral exploration company that is advancing its Pueblo Grande and Juan de Herrera gold projects in the. 11 historical mineral occurrences, including 8 gold showings Select Historical sampling highlights: Rock grab samples: 25.0 g/t Au, 15.7 g/t Au, 11.6 g/t Au, 6.3 g/t Au & 4.5 g/t Au. This initial phase will be followed up with ground geophysical surveys of induced polarization ("IP") and further detailed work to delineate targets for near-term drill testing. The ongoing activity entails project-wide prospecting, geological mapping, and sampling to further assess the 7 high priority, and 11 secondary target areas delineated by previous exploration work, s shown on the accompanying map. announced it has commenced exploration field work on the Motherlode Gold Project ("Motherlode" or the "Project") within the Burin Peninsula of southern Newfoundland, Canada. Commences Field Work At Motherlode Gold Project in Newfoundland, Canada
A total of 330 rock samples have been submitted to the laboratory for analyses. The Company has completed the first phase project-wide exploration program of prospecting, geological mapping and surface sampling, with emphasis on the 7 high priority and 11 secondary target areas outlined in previous news releases. The Motherlode Zone hosts the Project's most notable gold mineralization and related surface colour gossan identified to date, with rock grab sample values up to 25.0 g/t gold and historical drill results including 3.5m at 1.4 g/t gold. These two surveys will cover a 1,000 metre portion of the laterally extensive shear-structure trend which bisects the Zone in a northeast - southwest direction. The IP survey will consist of 11 lines at 100 metre spacing for an estimated total of 7.5 line-kilometers. Three environments/styles are most common: gold in greenstone belts, gold in porphyry deposits, and gold in epithermal deposits. Gold forms in close association with volcanoes or is hosted in volcanic rocks. The Company has initiated a ground geophysical program of magnetic and induced polarization surveying at the high priority Motherlode Zone. Photo shows gold jewelry recovered from the ash deposits of the 79 A.D. announced it has commenced ground geophysical surveying at the Motherlode Gold Project within the Burin Peninsula of southern Newfoundland, Canada. Commences Ground Geophysical IP Survey At Motherlode Gold Project in Newfoundland, Canada
0 kommentar(er)
