Abstract
ABSTRACTMajor and trace element concentrations in fresh and altered coals in outcrops and coalfields from Táchira and Mérida states (Venezuela), as well as from Napo and Pastaza provinces (Ecuador), have been determined to establish inorganic parameters not dependent of weathering effects. Noteworthy is that the Ti/Zr ratio is approximately constant in each sedimentary basin even for great distances (>100 km). Worldwide data of trace elements analysis in coal samples support the stated Ti/Zr ratio constancy in different basins for fresh and weathered ones. Therefore, Ti/Zr ratio can be considered a rapid tool to easily identify coal seam correlations.
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