Litho chemical Prospecting for Gold Mineralization In Duweishat Mine Area-Northern Sudan

Abstract

The studied locality lies in North state of arid to semi-arid climate, where physical-mechanical weathering and denudation processes dominate. The lithostratgraphic sequence in geochronological order (from bottom to top) as high-grade gneisses, low-grade metasedments, serpentinized altrabasic (ophiolite complex) rocks, and younger granitoidal intrusions. Results which were obtained for Au and accompanying elements (Ag, Co, Cu, Pb, and Zn) were subjected to statistical analysis to reveral parameters such as (background value (Cb), coefficient of correlation, coefficient of variation, geochemical factors, productivities, and coefficient of dispersion). Sampling of residual soil was found to be effective in prospecting to reveal anomalous contents of chemical elements in the study area. Statistical methods interpretation of data proved to be effective and complement each other. The coefficients of correlation of Au with the accompanying elements in chip composite samples show values more reliable values for prospecting than those of the soil samples. Gold dispersion in the study area shows erratic behavior. The other mobile elements are dispersed around the mineralized quartz veins. The morphology of secondary dispersion halos of ore elements reflects more or less the morphology of the hidden ore bodies Coefficients of correlation when they are reliable can be used to define pathfinder to prospect for difficult gold. Geochemical factor can indicate horizon of mineralization and level of weathering.