S. Helle M. E. Cisternas G. Alfaro D. Méndez


The coal-bearing sequence of Oligo-Miocene age has been studied in the Pupunahue Basin, in order to establish a model type of study to be applied to other deposits of similar characteristics in the south of Chile. The following elements were analyzed in coals: B, S, Ti, V, Cr, Co, Ni, Cu, Zn, Ga, Ge, As, Cd and Pb. In shales were determined: Ti, V, Cr, Co, Ni, Cu, Zn, As, Cd and Pb. The contents of sulphur and boron indicate a moderate marine influence in cornparison with other deposits of the region (e.g. Catamutún). Elements of economic importance, such as Ge, V and Ti, display no interesting concentrations. The level of arsenic, sulphur, zinc and cadmium is not significant enough to consider them as potential contaminants.KEY WORDS. Trace elements in coals. Pupunahue. Chile. 


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