Evaluation in coverage area and study of integrated prospecting method in Nzega area of Tanzania
The Nzega greenstone belt is one of the famous eight greenstone belts around Lake Victoria in Tan-zania,and it is also the important gold production area.Due to its high surface coverage and low level of geo-logical investigation and exploration work,although there is still some potential for prospecting hidden gold deposits,it also faces difficulties in selecting areas for evaluation and prospecting.The research and practice result has shown that in the evaluation of selected areas,the interpretation of regional aeromagnetic anoma-lies for the belt iron formation of the Archaean Nyanza Group and the analysis of geochemical gold anomalies in the study area are the most important technology methods.In the exploration work to use comprehensive geological,geophysical and geochemical exploration method,the combination of magnetic method and in-duced polarization method has a good effect on exploration of gold deposit within the iron bearing formation or near contact zones or shear zones under the coverage area.For the first time,drilling hole sampling meth-od is used in the area,and geological engineering project is carried out on the gold bearing alteration zone de-veloped under the cover layer,a certain prospecting result is achieved.Multiple gold deposits(ore points)such as Iborogo,Lusu and Choma are successively discovered.
greenstone beltcoverage areageological-geophysical-geochemical integrated prospecting meth-oddrilling hole for samplingNzega areaTanzania
万方数据
维普
