Scholarly works
Permanent URI for this collectionhttps://repository.ui.edu.ng/handle/123456789/420
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Item Thermodynamic properties prediction of the bulk modulus of sediment-hosted disseminated gold deposits(2015-06) Adetoyinbo, A. A.; Bello, A. K.An equation of state that connects pressure, volume, and temperature are very important in studying the temperature dependence of the thermal bulk modulus. Pressure, and temperature also determines the state of mutter at different depths, different geological environments. A lot of work has been carried out on gold which includes: the determination of the Critical point of gold, geochemistry of gold, the role of organic matter and source of gold in sediment-hosted disseminated gold mineralization using Rock-Eva Analysis. Temperature effects on the universal equation of state of solids among others. Hence, this work aimed at the investigation of high temperature thermodynamic properties prediction of the hulk modulus of sediment-hosted disseminated gold using model with experimental data. Analysis was carried out with pressure vessel, analysis of both pressure and temperature effects on bulk modulus of gold can be use to predict the future state of gold deposits.Item High temperature and pressure impact on volume of Ore deposits; itagunmodi gold deposit, South West Nigeria as a case study(2012) Adetoyinbo, A. A.; Bello, A. K.; Hammed, O. S.An understanding of the Earth’s interior depends on information about the behavior and properties of matter under high pressures and temperatures. An equation of state that connects pressure (P), volume (V), and temperature (T) is very important. This work examines the impact of high temperature and pressure on the formation and maturity of sediment-hosted disseminated gold (SHDG) deposits in Itagunmodi, Osun State, Nigeria located in the clayey soil types derived from variably migmatised gneiss, biotite-and-biotite-homblende- gneiss and weathered amphibolites respectively. The melting temperatures of gold were determined by differential thermal analyses. After application of appropriate correction for the effect of pressure on emf of thermocouples, the melting curves are linear with the isothermal volume of the melting solid to within the precision of the measurement. This melting point of gold at variable high temperature and pressure, if extrapolated could be used as a primary standard for measurements.