Geochemical And Mineralogical Characteristics Of Selinsing Gold Deposit

The average concentration of gold in the Earth‟s crust is mostly about 0.005 g/t, which is much lower than the other metallic metals. Therefore, systematic borehole logging has been conducted on borehole sample, covering about 2 holes. Sample A and E are coming from the same hole but different depth that is MSM DD036, while sample B,C and D are coming from holes MSM DD035. The objective is to identify the geology and potential gold mineralization in the prospect including observing the grade of the gold and others metallic element by knowing their concentration. In this research, pyrite, quartz and arsenopyrite are the major mineral in the gold particle as identified from the SEM analysis. Other than that, in order to do mineral identification, mineral can be know based on the peak pattern analysed by XRD and major oxide element that can be obtained from samples had been analysed by XRF. For chemical analysis in this research, the direct aqua regia was conducted to determine the grade of the other metallic elements such as Al, Cu and Fe that had high value of weight percentage, while the solvent extraction method was conducted only for tested Au the presence in the sample. From the experimental work conducted, pre-concentration such as solvent extraction can increase the gold detection under AAS analysis where large amount of iron will be removed from the solution. As a conclusion, gold in the hole MSM DD035 at Selinsing Gold Mine show the highest concentration than the hole MSM DD036